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general description the max96709 is a compact serializer in a 4mm x 4mm tqfn package especially suited for automotive camera applications. the embedded control channel operates at 9.6kbps to 1mbps in i 2 c mode, allowing programming of serializer, deserializer, and camera registers independent of video timing. for driving longer cables, the ic has programmable pre/deemphasis. programmable spread spectrum is available on the serial output. the serial output meets iso 10605 and iec 61000-4-2 esd standards. the supply range is 1.7v to 1.9v. the max96709 is available in a 24-pin 0.5mm lead pitch, and operates over the -40 c to +115 c temperature range. applications automotive camera applications benefts and features ideal for safety camera applications ? works with low-cost 50 coax (100 stp) cables ? error detection of video data ? high-immunity mode for robust control-channel emc tolerance ? best-in-class supply current: 88ma (max) ? pre/deemphasis allows 15m cable at full speed ? 24-pin (4mm x 4mm) tqfn package with 0.5mm lead pitch high-speed data serialization for megapixel cameras ? up to 1.74gbps serial-bit rate ? 12.5mhz to 87mhz x 12 bit + h/v data ? 16.66mhz to 116mhz x 11-bit + h/v data (through internal encoding) multiple modes for system flexibility ? 9.6kbps to 1mbps control channel in i 2 c mode (with clock stretch) ? crosspoint switch accepts any input bitmap ? modes for encoded vsync and hsync reduces emi and shielding requirements ? programmable output spread spectrum ? tracks spread spectrum applied at the parallel input ? 1.7v to 1.9v i/o supply peripheral features for camera power-up and verification ? built-in prbs generator for ber testing ? dedicated gpo for camera frame-sync trigger and other uses ? remote/local wake-up from sleep mode meets aec-q100 automotive specification ? -40c to +115c operating temperature ? 8kv contact and 15kv air iec 61000-4-2 and iso 10605 esd protection ordering information appears at end of data sheet. 19-8161; rev 0; 2/16 cam max 96709 max 96708 video i 2 c gpu video i 2 c simplifed block diagram max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive evaluation kit available
general description ............................................................................ 1 applications .................................................................................. 1 benefits and features .......................................................................... 1 simplified block diagram ........................................................................ 1 absolute maximum ratings ...................................................................... 7 package information ........................................................................... 7 24-pin tqfn-ep ............................................................................. 7 dc electrical characteristics ..................................................................... 8 ac electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 typical operating characteristics ................................................................ 13 pin configuration ............................................................................. 15 pin description ............................................................................... 15 functional block diagram ...................................................................... 17 detailed description ........................................................................... 22 serial link signaling and data format ........................................................... 22 operating modes ......................................................................... 22 video/configuration link ................................................................... 22 single/double mode ....................................................................... 23 hs/vs encoding ......................................................................... 23 error detection ........................................................................... 23 bus widths .............................................................................. 23 control channel and register programming ...................................................... 26 forward control channel ................................................................... 26 reverse control channel ................................................................... 26 i 2 c interface ............................................................................ 26 remote-end operation .................................................................... 26 clock-stretch timing ...................................................................... 26 gpo/gpi control ........................................................................... 26 spread spectrum ........................................................................... 27 cable type configuration ..................................................................... 27 crossbar switch ............................................................................ 27 shutdown/sleep modes ...................................................................... 28 configuration link ........................................................................ 28 serialization disable ...................................................................... 28 sleep mode ............................................................................. 28 link startup procedure .................................................................... 29 maxim integrated 2 table of contents max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
register map ................................................................................ 30 gmsl register map ......................................................................... 30 seraddr (0x00) ........................................................................... 34 desaddr (0x01) ........................................................................... 34 ss (0x02) ................................................................................ 35 sdiv (0x03) .............................................................................. 35 main_control (0x04) ....................................................................... 36 prbs_len (0x05) .......................................................................... 36 cmllvl_preemp (0x06) ..................................................................... 37 config (0x07) ............................................................................ 38 rsvd_8 (0x08) ............................................................................ 38 i2c_source (0x09, 0x0b) ................................................................... 39 i2c_dest (0x0a, 0x0c) ..................................................................... 39 i2c_config (0x0d) ......................................................................... 40 gpio_en (0x0e) ........................................................................... 41 gpio_out (0x0f) .......................................................................... 41 gpio_in (0x10) ........................................................................... 42 errg (0x11) .............................................................................. 42 rsvd_12 (0x12) ........................................................................... 43 pd (0x13) ............................................................................... 43 rsvd_14 (0x14) ........................................................................... 43 input_status (0x15) ........................................................................ 44 rsvd_16 (0x16) ........................................................................... 44 rsvd_17 (0x17) ........................................................................... 44 rsvd (0x18 to 0x1b) ....................................................................... 45 rsvd (0x1c) .............................................................................. 45 rsvd_1d (0x1d) ........................................................................... 45 id (0x1e) ................................................................................ 45 revision (0x1f) ........................................................................... 46 crossbar (0x20 to 0x3e) .................................................................... 46 crossbar_hs (0x3f) ....................................................................... 47 crossbar_vs (0x40) ........................................................................ 47 crossbar_de (0x41) ........................................................................ 48 link_config (0x42) ......................................................................... 48 rsvd_43 (0x43) ........................................................................... 49 rsvd (0x44 to 0x46) ....................................................................... 49 rsvd (0x47 to 0x49) ........................................................................ 49 maxim integrated 3 table of contents (continued) max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
rsvd (0x4a to 0x4c) ....................................................................... 49 cxtp (0x4d) .............................................................................. 50 rsvd (0x4e to 0x50) ....................................................................... 50 rsvd (0x51 to 0x53, 0x5d to 0x5f) ............................................................ 50 rsvd (0x54, 0x55) ......................................................................... 51 rsvd (0x56, 0x57) ......................................................................... 51 rsvd (0x58, 0x59) ......................................................................... 51 rsvd (0x5a to 0x5c) ....................................................................... 51 rsvd (0x60, 0x61) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 rsvd (0x62, 0x63) ......................................................................... 52 rsvd (0x64, 0x65) ......................................................................... 52 prbs_type (0x66) ......................................................................... 52 auto_clink (0x67) ......................................................................... 53 rsvd_68 (0x68) ........................................................................... 53 rsvd_69 (0x69) ........................................................................... 53 rsvd_96 (0x96) ........................................................................... 54 rsvd_97 (0x97) ........................................................................... 54 rsvd_98 (0x98) ........................................................................... 54 rsvd_99 (0x99) ........................................................................... 55 rsvd_9a (0x9a) .......................................................................... 55 rsvd_c8 (0xc8) .......................................................................... 55 rsvd_c9 (0xc9) ........................................................................... 56 rsvd_fc (0xfc) ........................................................................... 56 rsvd_fd (0xfd) ........................................................................... 56 rsvd_fe (0xfe) ........................................................................... 57 rsvd_ff (0xff) ............................................................................ 57 applications information ........................................................................ 58 parallel interface ............................................................................ 58 bus data width .......................................................................... 58 bus data rates .......................................................................... 58 crossbar-switch programming .............................................................. 59 recommended crossbar-switch program procedure ............................................ 59 maxim integrated 4 table of contents (continued) max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
i 2 c interface ............................................................................... 60 i 2 c bit rate ............................................................................. 60 software programming of device addresses ................................................... 60 i 2 c address translation .................................................................... 60 configuration blocking ..................................................................... 60 cascaded/parallel devices ................................................................. 60 device address .......................................................................... 61 spread spectrum ........................................................................... 61 manual programming of the spread-spectrum divider .............................................. 61 equation: ............................................................................... 61 board layout ............................................................................... 62 power-supply circuits and bypassing ......................................................... 62 high-frequency signals .................................................................... 62 esd protection ............................................................................. 62 compatibility with other gmsl devices ......................................................... 63 device configuration and component selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 internal input pulldowns .................................................................... 63 i 2 c pullup resistors ....................................................................... 63 ac-coupling capacitors ................................................................... 63 cables and connectors .................................................................... 64 prbs ..................................................................................... 64 gpi/gpo .................................................................................. 64 fast detection of loss-of-lock .............................................................. 64 providing a frame sync (camera applications) ................................................. 64 entering/exiting sleep mode .................................................................. 64 typical application circuits ..................................................................... 65 ordering information .......................................................................... 65 revision history .............................................................................. 66 maxim integrated 5 table of contents (continued) max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
figure 1. serial-output parameters ............................................................... 15 figure 2. output waveforms at out+, out- ........................................................ 16 figure 3. single-ended output template .......................................................... 16 figure 4. worst-case pattern input ............................................................... 16 figure 5. parallel clock input requirements ........................................................ 16 figure 6. i 2 c timing parameters ................................................................. 17 figure 7. differential output template ............................................................. 17 figure 8. input setup and hold times ............................................................. 18 figure 9. gpi-to-gpo delay .................................................................... 18 figure 10. serializer delay ...................................................................... 19 figure 11. link startup time .................................................................... 19 figure 12. power-up delay ..................................................................... 20 figure 13. 24-bit mode serial-data format ......................................................... 22 figure 14. 32-bit mode serial-data format ......................................................... 23 figure 15. coax connection .................................................................... 25 figure 16. crossbar-switch dataflow ............................................................. 25 figure 17. state diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 figure 18. crossbar-switch default mapping ....................................................... 57 figure 19. human body model esd test circuit ..................................................... 60 figure 20. iec 61000-4-2 contact discharge esd test circuit ......................................... 60 figure 21. iso 10605 contact discharge esd test circuit ............................................ 60 table 1. reverse control-channel modes .......................................................... 24 table 2. link-startup procedure ................................................................. 27 table 3. input data-width selection .............................................................. 56 table 4. data-rate selection .................................................................... 56 table 5. output spread ........................................................................ 59 table 6. spread limitations ..................................................................... 59 table 7. modulation coefficients and maximum sdiv settings ......................................... 60 table 8. feature compatibility ................................................................... 61 table 9. suggested connectors and cables for gmsl ................................................ 62 maxim integrated 6 list of tables list of figures max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
avdd to gnd* ..................................................... -0.5v to +1.9v dvdd to gnd* ..................................................... -0.5v to +1.9v out+, out- to gnd* ........................................... -0.5v to +1.9v all other pins to gnd* .......................... -0.5v to (dvdd + 0.5v) out+, out- short circuit to ground or supply ........ continuous continuous power dissipation, t a = +70c tqfn (derate 27.8mw/c above +70c) ............... 2222.2mw operating temperature range .......................... -40c to +115c junction temperature ...................................................... +125c storage temperature range ............................ -40c to +150c soldering temperature (reflow) ....................................... +260c *ep externally connected to gnd. package code t2444+4 outline number 21-0139 land pattern number 90-0022 single-layer board: junction-to-ambient thermal resistance ( ja ) 48 junction-to-case thermal resistance ( jc ) 3 four-layer board: junction-to-ambient thermal resistance ( ja ) 36 junction-to-case thermal resistance ( jc ) 3 package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four-layer board. for detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial . absolute maximum ratings stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to ab solute maximum rating conditions for extended periods may affect device reliability. package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. 24-pin tqfn-ep maxim integrated 7 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
(v dvdd = v avdd = 1.7v to 1.9v, r l = 100 1% (differential), t a = -40c to +115c, ep connected to gnd, typical values are at v dvdd = v avdd = 1.8v, t a = +25c, unless otherwise noted.) (note 1) parameter symbol conditions min typ max units single-ended inputs (din_, pclkin, hs, vs, him, ms) high-level input voltage v ih 0.65 x v dvdd v low-level input voltage v il 0.35 x v dvdd v input current i in v in = 0 to v dvdd -20 +20 a single-ended output (gpo) high-level output voltage v oh i oh = -2ma v dvdd - 0.2 v low-level output voltage v ol i ol = 2ma 0.2 v output short-circuit current i os v o = 0v 3 12 21 ma i 2 c and general-purpose i/os (sda, scl, gpio_) with open-drain outputs high-level input voltage v ih 0.7 x v dvdd v low-level input voltage v il 0.3 x v dvdd v input current i in v in = 0 to v dvdd (note 2), sda, scl -110 +5 a v in = 0 to v dvdd (note 2), gpio_ -80 +5 low-level open-drain output voltage v ol i ol = 3ma 0.4 v input capacitance c in each pin (note 3) 10 pf differential outputs (out+, out-) differential output voltage v od preemphasis off, high drive ( figure 1 ) 300 400 500 mv 3.3db preemphasis, high drive ( figure 2 ) 350 610 3.3db deemphasis, high drive ( figure 2 ) 240 425 change in v od between complementary output states v od 25 mv output offset voltage (v out+ + v out- )/2 = v os v os preemphasis off 1.1 1.4 1.56 v change in v os between complementary output states v os 25 mv output short-circuit current i os v out+ or v out- = 0v -60 ma v out+ or v out- = 1.9v 25 magnitude of differential output short-circuit current i osd v od = 0v 25 ma output-termination resistance (internal) r o from out+ or out- to avdd 45 54 63 dc electrical characteristics maxim integrated 8 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
(v dvdd = v avdd = 1.7v to 1.9v, r l = 100 1% (differential), t a = -40c to +115c, ep connected to gnd, typical values are at, v dvdd = v avdd = 1.8v, t a = +25c, unless otherwise noted.) (note 1) parameter symbol conditions min typ max units reverse control-channel receiver outputs (out+, out-) high-switching threshold v chr legacy 27 mv high immunity 40 low-switching threshold v clr legacy -27 mv high immunity -40 single-ended serial outputs (out+ or out-) single-ended output voltage v o preemphasis off, high drive ( figure 3 ) 375 500 625 mv 3.3db preemphasis, high drive ( figure 2 ) 435 765 3.3db deemphasis, high drive ( figure 2 ) 300 535 output short-circuit current i os v out+ or v out- = 0v -69 ma v out+ or v out- = 1.9v 32 output-termination resistance (internal) r o from out+ or out- to avdd 45 54 63 power supply supply current, worst-case pattern ( figure 4 ) i wcs f pclkin = 116mhz, bws = 0, default register values, avdd + dvdd (1.9v) 66 88 ma f pclkin = 87mhz, bws = 1, default register values, avdd + dvdd (1.9v) 62 83 sleep-mode supply current i ccs wake-up receiver enabled 40 100 a esd protection out+, out- (note 4) v esd human body model, r d = 1.5k, c s = 100pf 8 kv iec 61000-4-2, r d = 330, c s = 150pf, contact discharge 8 iec 61000-4-2, r d = 330, c s = 150pf, air discharge 15 iso 10605, r d = 2k, c s = 330pf, contact discharge 8 iso 10605, r d = 2k, c s = 330pf, air discharge 15 all other pins (note 5) v esd human body model, r d = 1.5k, c s = 100pf 4 kv dc electrical characteristics (continued) maxim integrated 9 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
(v dvdd = v avdd = 1.7v to 1.9v, r l = 100 1% (differential), t a = -40c to +115c, ep connected to gnd, typical values are at, v dvdd = v avdd = 1.8v, t a = +25c, unless otherwise noted.) (note 1) parameter symbol conditions min typ max units parallel clock input (pclkin) clock frequency f pclkin bws = 0, single input 16.66 58 mhz bws = 1, single input 12.5 43.5 bws = 0, double input 33.32 116 bws = 1, double input 25 87 clock duty cycle dc t high /t t or t low /t t (note 3, figure 5 ) 35 50 65 % clock transition time t r, t f (note 3, figure 5 ) 4 ns clock jitter t j 1.74gbps bit rate, 300khz sinusoidal jitter (note 3) 800 ps i 2 c port timing i 2 c bit rate 9.6 1000 kbps output rise time t r 30% to 70%, c l = 10pf to 100pf, 1k pullup to dvdd 20 150 ns output fall time t f 70% to 30%, c l = 10pf to 100pf, 1k pullup to dvdd 20 150 ns i 2 c timing ( figure 6 ) scl clock frequency f scl low f scl range: (i2cmstbt = 010, i2cslvsh = 10) 9.6 100 khz mid f scl range: (i2cmstbt 101, i2cslvsh = 01) > 100 400 high f scl range: (i2cmstbt = 111, i2cslvsh = 00) > 400 1000 start condition hold time t hd:sta f scl range, low 4 s f scl range, mid 0.6 f scl range, high 0.26 low period of scl clock t low f scl range, low 4.7 s f scl range, mid 1.3 f scl range, high 0.5 high period of scl clock t high f scl range, low 4 s f scl range, mid 0.6 f scl range, high 0.26 repeated start condition setup time t su:sta f scl range, low 4.7 s f scl range, mid 0.6 f scl range, high 0.26 ac electrical characteristics maxim integrated 10 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
(v dvdd = v avdd = 1.7v to 1.9v, r l = 100 1% (differential), t a = -40c to +115c, ep connected to gnd, typical values are at, v dvdd = v avdd = 1.8v, t a = +25c, unless otherwise noted.) (note 1) parameter symbol conditions min typ max units data hold time t hd:dat f scl range, low 0 ns f scl range, mid 0 f scl range, high 0 data setup time t su:dat f scl range, low 250 ns f scl range, mid 100 f scl range, high 50 setup time for stop condition t su:sto f scl range, low 4 s f scl range, mid 0.6 f scl range, high 0.26 bus-free time t buf f scl range, low 4.7 s f scl range, mid 1.3 f scl range, high 0.5 data valid time t vd:dat f scl range, low 3.45 s f scl range, mid 0.9 f scl range, high 0.45 data valid-acknowledge time t vd:ack f scl range, low 3.45 s f scl range, mid 0.9 f scl range, high 0.45 pulse width of spikes suppressed t sp f scl range, low 50 ns f scl range, mid 50 f scl range, high 50 capacitive load of each bus line c b (note 3) 100 pf switching characteristics (note 3) differential/single-ended output rise/fall time t r, t f 20% to 80%, v od , 400mv differential r l = 100, 500mv single-ended r l = 50, serial bit rate = 1.74gbps 250 ps total serial-output jitter (differential output) t tsoj1 1.74gbps prbs, measured at v od = 0v differential, preemphasis disabled ( figure 7 ) 0.25 ui deterministic serial-output jitter (differential output) t dsoj2 1.74gbps prbs, measured at v od = 0v differential, preemphasis disabled ( figure 7 ) 0.15 ui total serial-output jitter (single-ended output) t tsoj1 1.74gbps prbs, measured at v o /2, preemphasis disabled ( figure 3 ) 0.25 ui ac electrical characteristics (continued) maxim integrated 11 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
note 1: limits are 100% production tested at t a = +115c. limits over the operating temperature range are guaranteed by design and characterization, unless otherwise noted. note 2: i in min is due to voltage drop across the internal pullup resistor. note 3: not production tested. guaranteed by design. note 4: specified pin to ground . note 5: specified pin to all supply/ground . note 6: measured in serial link bit times. bit time = 1/(30 x f pclkin ) for bws = 0; bit time = 1/(40 x f pclkin ) for bws = 1. (v dvdd = v avdd = 1.7v to 1.9v, r l = 100 1% (differential), t a = -40c to +115c, ep connected to gnd, typical values are at, v dvdd = v avdd = 1.8v, t a = +25c, unless otherwise noted.) (note 1) parameter symbol conditions min typ max units deterministic serial-output jitter (single-ended output) t dsoj2 1.74gbps prbs, measured at v o /2, preemphasis disabled ( figure 3 ) 0.15 ui parallel data-input setup time t set ( figure 8 ) 2 ns parallel data input hold time t hold ( figure 8 ) (note 3) 1 ns gpi-to-gpo delay t gpio deserializer gpi to serializer gpo ( figure 9 ) 350 s serializer delay t sd spread spectrum enabled ( figure 10 ) (notes 3, 6) 2065 bits spread spectrum disabled ( figure 10 ) (notes 3, 6) 1095 link start time t lock ( figure 11 ) 2 ms power-up time t pu ( figure 12 ) 7 ms ac electrical characteristics (continued) maxim integrated 12 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
(v avdd = v dvdd = 1.8v, t a = +25 c, unless otherwise noted.) 40 45 50 55 60 65 70 10 30 50 70 90 supply current (ma) pixel clock frequency (mhz) supply current vs. pixel clock frequency (bws = 1) toc02 prbs on, coax mode, ss off pe off pe = 0xb to 0xf pe = 0x1 to 0x4 dbl = 1 dbl = 0 40 45 50 55 60 65 70 75 15 35 55 75 95 115 supply current (ma) pixel clock frequency (mhz) supply current vs. pixel clock frequency (bws = 0) toc01 prbs on, coax mode, ss off pe off pe = 0xb to 0xf pe = 0x1 to 0x4 dbl = 1 dbl = 0 40 45 50 55 60 65 15 35 55 75 95 115 supply current (ma) pixel clock frequency (mhz) supply current vs. pixel clock frequency (bws = 0) toc03 prbs on, coax mode, pe off all spread values dbl = 1 dbl = 0 40 45 50 55 60 65 10 30 50 70 90 supply current (ma) pixel clock frequency (mhz) supply current vs. pixel clock frequency (bws = 1) toc04 prbs on, coax mode, pe off all spread values dbl = 1 dbl = 0 -80 -70 -60 -50 -40 -30 -20 -10 0 10 18.5 19.0 19.5 20.0 20.5 21.0 21.5 supply current (ma) pixel clock frequency (mhz) output power spectrum vs. pclk frequency (various spread) toc05 f pclkin = 20mhz 4% spread 2% spread 1% spread 0.5% spread no spread -80 -70 -60 -50 -40 -30 -20 -10 0 10 47 48 49 50 51 52 53 supply current (ma) pixel clock frequency (mhz) output power spectrum vs. pclk frequency (various spread) toc06 f pclkin = 50mhz 4% spread 2% spread 1% spread 0.5% spread no spread typical operating characteristics maxim integrated 13 www.maximintegrated.com max96709 14-bit gmsl serializer with high mode and coax/stp cable drive
(v avdd = v dvdd = 1.8v, t a = +25 c, unless otherwise noted.) 0 10 20 30 40 50 60 70 0 5 10 15 20 25 pixel clock frequency (mhz) stp cable length (m) maximum pixel clock frequency vs. stp cable length (ber < 10 - 10 ) toc07 ber can be as low as 10 - 12 for cable lengths less than 15m aeq no eq 4.3db eq 9.7db eq no pe, dbl = 0 0 10 20 30 40 50 60 70 0 10 20 30 40 pixel clock frequency (mhz) coax cable length (m) maximum pixel clock frequency vs. coax cable length (ber < 10 - 10 ) toc08 ber can be as low as 10 - 12 for cable lengths less than 15m aeq no eq 4.3db eq no pe, dbl = 0 100mv/div toc09 200ps/div serial link switching pattern with 4.4db preemphasis (1.5gbps, 10m stp cable) 50mv/div toc10 200ps/div serial link switching pattern with 3.3db preemphasis (1.5gbps, 20m coax cable) typical operating characteristics (continued) maxim integrated 14 www.maximintegrated.com max96709 14-bit gmsl serializer with high mode and coax/stp cable drive
pin name function ref supply type power 3, 13 gnd analog and digital ground power 16 avdd 1.8v analog power supply. bypass avdd to gnd with 0.1f, and 0.001f capacitors as close as possible to the device with the smaller value capacitor closest to avdd. power 22 dvdd 1.8v digital power supply. bypass dvdd to gnd with 0.1f, and 0.001f capacitors as close as possible to the device with the smaller value capacitor closest to dvdd. power ep exposed pad. ep is internally connected to device ground. must connect ep to the pcb ground plane through a via array for proper thermal and electrical performance. power high-speed digital single function 1 din4 parallel data input. internal pulldown to gnd. dvdd digital 2 din5 parallel data input. internal pulldown to gnd. dvdd digital 4 din6 parallel data input. internal pulldown to gnd. dvdd digital 5 din7 parallel data input. internal pulldown to gnd. dvdd digital 6 din8 parallel data input. internal pulldown to gnd. dvdd digital 7 din9 parallel data input. internal pulldown to gnd. dvdd digital din 5 din 6 din 7 din 8 din 4 sda out + out - scl gnd dvdd din 2 din 3 din 12 / hs din 11 / gpio 2 din 10 / gpio 1 din 9 gnd avdd din 1 din 13 / vs din 0 gpo / him pclkin tqfn ( 4 mm x 4 mm ) top view + 13 14 15 16 17 18 12 11 10 9 8 7 19 20 21 22 23 24 6 5 4 3 2 1 max 96709 pin confguration pin description maxim integrated 15 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
pin name function ref supply type 19 pclkin parallel clock input with internal pulldown to gnd. latches parallel data inputs and provides the pll reference clock. dvdd digital 20 din0 parallel data input. internal pulldown to gnd. dvdd digital 21 din1 parallel data input. internal pulldown to gnd. dvdd digital 23 din2 parallel data input. internal pulldown to gnd. dvdd digital 24 din3 parallel data input. internal pulldown to gnd. dvdd digital multifunction 8 din10/gpio1 parallel data input/gpio. defaults to parallel data input on power- up. parallel data input has internal pulldown to gnd. gpio1 has an open-drain input/output with internal 60k pullup to dvdd. dvdd digital 9 din11/gpio2 parallel data input/gpio. defaults to parallel data input on power- up. parallel data input has internal pulldown to gnd. gpio2 has an open-drain input/output with internal 60k pullup to dvdd. dvdd digital 10 din12/hs parallel data input/horizontal sync with internal pulldown to gnd. defaults to parallel data input on power-up. defaults to horizontal- sync input when hs/vs encoding is enabled. dvdd digital 11 din13/vs parallel data input/vertical sync with internal pulldown to gnd. defaults to parallel data input on power-up. defaults to vertical- sync input when hs/vs encoding is enabled. dvdd digital confguration and interface 12 gpo/him general-purpose output/high-immunity mode input with internal pulldown to gnd. him is latched at power-up and switches to gpo output automatically after power-up. connect him to dvdd with a 30k? resistor to set high, or leave open to set low. highimm can be programmed to a different value after power-up. highimm in the deserializer must be set to the same value. gpo output follows the state of the gpi (or int) input on the gmsl deserializer. gpo is low upon power-up. dvdd digital 14 out- inverting coax/twisted-pair serial output digital 15 out+ noninverting coax/twisted-pair serial output digital 17 sda serial data. input/output with internal 30k? pullup to dvdd. sda is the sda input/output of the serializer's i 2 c master/slave. sda has an open-drain driver and requires a pullup resistor. dvdd digital 18 scl serial clock input/output with internal 30k? pullup to dvdd. scl is the scl input/output of the serializer's i 2 c master/slave. scl has an open-drain driver and requires a pullup resistor. dvdd digital pin description (continued) maxim integrated 16 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
figure 1. serial-output parameters parallel to serial sspll scramble / hven / crc / parity / encode fifo control vs hs fcc pclkin din 12 / hs reverse control channel video max 96709 out + out - clkdiv din 13 / vs din [ 9 : 0 ] cml tx sync i 2 c scl sda gpo / him crosspoint switch any 32 inputs to any 22 / 30 outputs 16 x 1 latch ( single ) or 16 x 2 latch ( dbl ) gpio 2 him rx din 10 / gpio 1 din 11 / gpio 2 functional block diagram out- v od v os gnd r l /2 r l /2 out+ out- out+ (out+) - (out-) v os(-) v os(+) ((out+) + (out-))/2 v os(-) v od(-) v od(-) v od = 0v dv os = | v os(+) - v os(-) | dv od = | v od(+) - v od(-) | v od (+) maxim integrated 17 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
figure 2. output waveforms at out+, out- figure 3. single-ended output template figure 4. worst-case pattern input figure 5. parallel clock input requirements out+ out- v os v od(p) v od(d) serial-bit time out+ or out- v o /2 v o /2 v o v o pclkin note: pclkin programmed for rising latch edge. din_ v il max t high t low t t t r t f v ih min pclkin maxim integrated max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
figure 6. i 2 c timing parameters figure 7. differential output template protocol scl sda start condition (s) bit 7 msb (a7) bit 6 (a6) bit 0 (r/w) acknowledge (a) stop condition (p) t su;sta v dvdd x 0.7 v dvdd x 0.7 v dvdd x 0.3 v dvdd x 0.3 t low t high t buf t hd;sta t r t sp t f t su;dat t hd;dat t vd;dat t vd;ack t su;sto 1/f scl 800mv p-p t tsoj1 2 t tsoj1 2 maxim integrated 19 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
figure 8. input setup and hold times figure 9. gpi-to-gpo delay v ih min v ih min v ih min v il max v il max v il max pclkin din_ t hold t set note: pclkin programmed for rising latching edge. t gpio t gpio v oh_min v ol_max v ih_min v il_max deserializer gpi serializer gpo maxim integrated 20 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
figure 10. serializer delay figure 11. link startup time t sd first bit last bit n n+3 expanded time scale n+4 n n+1 n+2 n-1 din_ pclkin out+/- serial link inactive serial link active channel disabled reverse control channel enabled t lock 500s pclkin reverse control channel available maxim integrated 21 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
detailed description the max96709 is a compact device with features especially suited for automotive camera applications. the device operates at a variety of input widths and word rates up to a total serial-data rate up to 1.74gbps. an embedded 9.6kbps to 1mbps control channel programs the serializer, deserializer, and any attached i 2 c peripherals. to promote safety applications, the device features crc protection of video data. in addition, high-immunity mode reduces the effects of bit errors corrupting communica - tion. preemphasis and a prbs tester allow for in-system evaluation and optimization of the link quality. the max96709 operates over the -40c to +115c auto - motive temperature range. serial link signaling and data format the serializer scrambles the input parallel data and combines this with the forward control data. the data is then encoded for transmission and output as a single- serialized bitstream at several times the input word rate (depending on bus width). the deserializer receives the serial data and recovers the clock signal. the data is then deserialized, decoded, and descrambled into parallel out - put data and forward control data. operating modes the gmsl devices are configurable to operate in many modes depending on the application. these modes allow for a more efficient use of serial bandwidth. most of these settings are set during system design, and are configured through register bits. video/confguration link in normal operation, the serializer runs in video link mode (serializer seren = 1) with video data and control data sent across the serial link. set seren = 0 in the serializer to turn off serialization. the serializer powers up in video link mode and requires a valid pclk for operation. a configuration link is available to set up the serializer, deserializer, and peripherals when pclk is not available. set seren = 0 and clink = 1 in the serializer to enable the configuration link (seren = 1 forces the serializer into video link mode). once pclk has been established, turn on the video link (seren = 1). by default, video link mode requires a valid pclk for operation. set auto_clink bit = 1 and seren = 1 in the serializer to have the device automatically switch between the video link and configuration link whenever pclk is not present. figure 12. power-up delay powered down 1.7v t pu reverse control channel disabled 500s pclkin powered up, serial link inactive powered up, serial link active reverse control channel enabled v dd maxim integrated 22 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
single/double mode single-/double-mode operation configures the available 1.74gbps bandwidth into a variety of widths and word rates. single-mode operation is compatible with all gmsl devices and serializers, yielding one parallel word for each serial word. double mode serializes two half-width parallel words for each serial word, resulting in a 2x increase in the parallel word rate range (compared to single mode). set dbl = 0 for single-mode operation and dbl = 1 for double-mode operation. hs/vs encoding by default, gmsl assigns a video bit slot to hsync, vsync, and de (if used). with hs/vs encoding, the device instead encodes special packets to sync signals to free up additional video bit slots. set hven = 1 to turn on hs/vs encoding (de, if enabled, uses up a video bit). hs/vs encoding requires that hsync, vsync, and de (if used) remain high during the active video and low during the blanking period. use hs/vs inversion when using reverse-polarity sync signals. error detection the serial link's 8b/10b encoding/decoding and 1-bit parity detect bit errors that occur on the serial link. an optional 6-bit crc check is available at the expense of 6 video bits. to activate 6-bit crc mode, set pxl_crc = 1 in the remote-side device first, then in the local-side device. when using 6-bit crc mode, the available inter - nal bus width is reduced by 6 bits in single-input mode (dbl = 0) and 3 bits in double-input mode (dbl = 1). note that the input bus width may already have been reduced due to pin availability of the serializer or deserializer; thus, the reduction of bandwidth from crc may not be visible (see table 3 ). bus widths the serial link has multiple bus-width settings that determine the parallel bus width and the resulting parallel word rate. the serial link operates to a maximum serial bit rate of 1.74gbps. the bws bit determines if each serial packet is 30 or 40 bits long, which translates to a maximum serial packet rate (and resulting maximum parallel word rate) of 58mhz or 43.5mhz when bws = 0 or 1 respectively. encoding translates the 24, or 32 paral - lel bits into 30- or 40-bit serial packets. one bit is used for parity, while a second is reserved for the control channel. an additional 6 bits are used during optional 6-bit crc. in addition, double mode splits the remaining word size in half, if used. the remaining bits can be used for video bits (minus any sync bits if h/v encoding is not used) the following modes list the internal bus widths. the number of available input and output pins may limit the actual bus width available. 24-bit mode ( figure 13 ) when bws = 0, the 30-bit serial packet corresponds with three 8b/10b symbols representing 24 bits (24-bit mode). after the parity and control channel, this leaves 16/22 bits of video data if crc is/or is not used (single mode), or 8/11 bits of video data if crc is/or is not used (double mode). 32-bit mode ( figure 14 ) when bws = 1, the 40-bit serial packet corresponds with four 8b/10b symbols representing 32 bits (32-bit mode). after parity and control channel, this leaves 24/30 bits of video data if crc is/or is not used (single mode), or 12/15 bits of video data if crc is/or is not used (double mode). maxim integrated 23 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
figure 13. 24-bit mode serial-data format 24 - bit mode packet parity - check bit fcc pcb d 0 d 1 d 21 d 20 d 19 d 18 d 17 serial data no pxl _ crc sda scl i 2 c forward control - channel bit d 0 d 1 d 21 d 0 d 1 d 15 d 21 d 20 d 19 d 18 d 17 2 bits 16 video bits d 16 d 15 22 bits 22 video bits d 16 6 pxl _ crc bits pxl _ crc on pxl _ crc dbl = 0 d 0 d 1 d 21 22 video bits * dbl = 1 d 0 d 1 d 10 d 11 d 12 d 21 11 x 2 video bits * d 0 d 1 d 15 16 video bits * d 0 d 1 d 7 d 8 d 9 d 15 8 x 2 video bits * dbl = 0 dbl = 1 no pxl _ crc , dbl = 0 58 mhz ( max ) no pxl _ crc , dbl = 1 116 mhz ( max ) pxl _ crc on , dbl = 0 58 mhz ( max ) pxl _ crc on , dbl = 1 116 mhz ( max ) * internal bits . input / output pin availability may limit the external bus width . maxim integrated 24 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
figure 14. 32-bit mode serial-data format 32 - bit mode packet parity - check bit fcc pcb d0 d 1 d24 d 23 d 29 d 28 d 27 serial data no pxl _ crc sda scl i 2 c forward control - channel bit d 0 d 2 d29 d 0 d 2 d23 d 29 d 28 d 27 d 26 d 25 2 bits 24 video bits d 26 d 25 30 bits 30 video bits d 24 6 pxl _ crc bits pxl _ crc on pxl _ crc d 0 d 1 d29 30 video bits * d 0 d 1 d14 d 15 d 16 d29 15 x 2 video bits * d 0 d 1 d23 24 video bits * d 0 d 1 d11 d 12 d 13 d23 12 x 2 video bits * dbl = 0 dbl = 1 dbl = 0 dbl = 1 no pxl _ crc , dbl = 0 43 . 5 mhz ( max ) no pxl _ crc , dbl = 1 87 mhz ( max ) pxl _ crc on , dbl = 0 43 . 5 mhz ( max ) pxl _ crc on , dbl = 1 87 mhz ( max ) * internal bits . input / output pin availability may limit the external bus width . maxim integrated 25 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
x = dont care. control channel and register programming the control channel sends information across the serial link for control of the serializer, deserializer, and any attached peripherals. the control channel is multiplexed onto the serial link and is available with or without the video channel. forward control channel control data sent from the serializer to the deserializer is sent on the forward control channel. the data is encoded as one of the serial bits in the forward high-speed link. after deserialization, the forward control-channel data is extract - ed from the serial link. the forward control-channel band - width exceeds the maximum external control data rate, and all data sent on the forward control channel appears on the remote side after transmission delay of a few bit times. reverse control channel control data sent from the deserializer to the serializer is sent on the reverse control channel. the data is encoded as a series of 1s pulses, with a maximum raw data rate of 1mbps. high-immunity mode is available to increase the robustness of the reverse control channel at a reduced raw bit rate of 500kbps. in table 1 , setting the rev_fast bit = 1 increases this rate back to 1mbps. when the input data rate (after encoding) exceeds the reverse data rate, the input clock is held through clock stretching to slow the external clock to match the internal bit rate. i 2 c interface the serial link connects the serializer and deserializer (serdes) i 2 c interfaces together through the control chan - nel. when an i 2 c master sends a command to one side of the link (local side) the control channel forwards this infor - mation to and from the other side of the link (remote side), allowing a single microcontroller to configure the serializer, deserializer, and peripherals. the microcontroller can be located on the serializer side (display applications) and the deserializer side (camera applications). dual micro - controller operations are supported as long as a software- arbitration method is used. the serial link assumes that only one microcontroller is talking at any given time. remote-end operation when an i 2 c master initiates communication on the local slave device (the serdes directly connected to the master), the remote-side device acts as a master device that sends data forwarded from the local-side device, and forwards any data received from peripher - als attached to the remote-side device. this remote- side master device operates according to the timing settings in the i 2 c master setting register. set the master settings to match the timing settings used by the external microcontroller. clock-stretch timing the i 2 c interface uses clock stretching to allow time for data to be forwarded across the serial link. the master microcontroller, along with any attached peripherals, must accept clock stretching of the gmsl devices. gpo/gpi control gpo on the serializer follows gpi transitions on the dese - rializer. this gpo/gpi function can be used to transmit signals such as a frame sync in a surround-view cam - era system (see the providing a frame sync (camera applications) section). optionally, gpo can be set directly by register bits. him pin setting revfast bit reverse control-channel mode maximum i 2 c bit rate ( k bps) low x legacy reverse control-channel mode (compatible with all gmsl devices) 1000 high 0 high-immunity mode 500 1 fast high-immunity mode (requires serial-data rate > 1.25gbps) 1000 table 1. reverse control-channel modes maxim integrated 26 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
spread spectrum the serializer contains a programmable spread-spectrum output to lower emission levels by spreading the clock- frequency peaks across a frequency spectrum. in addition, the serdes can track a spread input clock, eliminating the need for multiple spread clocks. cable type confguration the driver output is programmable for two kinds of cable,100 twisted pair and 50 coax (contact the factory for devices compatible with 75 cables). in coax mode, connect out+ to in+ of the deserializer. leave the unused in_ pin unconnected, or connect it to ground through 50, and a capacitor for increased power-supply rejection. connect out- to v dd through a 50 resistor ( figure 15 ). crossbar switch the crossbar switch routes data between the parallel input/ output and the serdes. the anything-to-anything rout - ing assures the mapping between the video source and destination. for each crossbar output (xbo_) an input multiplexer selects from the available crossbar inputs (xbi_) using the crossbar_ register bits ( figure 16 ). multiple crossbar outputs can use the same crossbar input. by default, the sync signals share the same inputs as the msbs of the video data. figure 15. coax connection figure 16. crossbar-switch dataflow out+ out- in+ optional components for increased power-supply rejection in- avdd 50? gmsl deserializer gmsl serializer low input xbi 0 : din 9 din 13 / vs din 12 / hs din 11 din 10 din 0 din 1 xbi 1 xbi 9 xbi 10 xbi 11 xbi 12 xbi 13 xbi 14 * xbi 15 * xbi 16 : din 9 din 13 / vs din 12 / hs din 11 din 10 din 0 din 1 xbi 17 xbi 25 xbi 26 xbi 27 xbi 28 xbi 29 xbi 30 * high input ( dbl = 1 only ) : : xbi 0 xbi 1 xb 30 xb 31 : : crossbar _ 5 force _ mux _ 0 1 0 invert _ mux _ 0 1 xbo _ 34 switches xbo 0 xbo 1 d 0 d 1 : : xbo 29 xbo 30 d 29 d 30 xbohs hs xbovs vs xbode de data sync pclk din 13 / vs xbi 13 * xbi 14 , xbi 15 , xbi 30 , xbi 31 input internally connected low . din 12 / hs xbi 28 xbi 12 xbi 13 xbi 28 xbi 12 din 11 / gpio 2 xbi 27 xbi 11 din 1 xbi 17 xbi 1 din 0 xbi 16 xbi 0 xbi 27 xbi 11 xbi 17 xbi 1 xbi 16 xbi 0 ... ... : : xbi 29 xbi 29 xbi 31 * maxim integrated 27 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
shutdown/sleep modes several sleep and shutdown modes are available when full operation is not needed. confguration link when the high-speed video link is not needed, or unavail - able, a configuration link can be used in its place. in configuration link mode, the parallel digital input/output is disabled, the lock pin remains low, and the serial link internally generates its own clock to allow full operation of the control channel (i 2 c and gpio). serialization disable when the serial link is not needed, such as when down - stream devices are powered off, the user can disable serialization. in this mode, all forward communication is shut down. the user can reenable serialization either locally, or through the reverse channel. sleep mode to reduce power consumption further, the devices can be put into sleep mode. in this mode, all registers keep their programmed values, and all functions in the device are powered down except for the wake-up detectors on the local control interface, and the serial link. any activity seen by the wake-up detectors temporarily turns on the control-channel interface. during this time, a microcon - troller can command the device to exit sleep mode. see the shutdown/sleep modes section . figure 17. state diagram clinken = 0 or seren = 0 all states power down or power off power on idle config link started config link operating program registers video link locking video link operating video link prbs test power off clinken = 1 clinken = 0 or seren = 1 power on config link locked config link unlocked video link unlocked video link locked prbsen = 1 prbsen = 0 seren = 0 or no pclkin seren = 0 or no pclkin seren = 1 , pclkin running wakeup sleep sleep = 1 for > 8 ms link wakeup signal sleep = 1 sleep = 0 , seren = 1 sleep = 0 , seren = 0 maxim integrated 28 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
link startup procedure table 2 lists the startup procedure for image-sensing applications. the control channel is available after the video link or the configuration link is established. if the deserializer powers up after the serializer, the control channel becomes unavailable until 2ms after power-up. no. c serializer deserializer c connected to deserializer set confguration inputs set confguration inputs 1 powers up (wait t pu ). powers up and loads default settings. establishes video link when valid pclk is available. powers up and loads default settings. locks to video link signal if available. 1a if no pclk, programs clinken, seren, and/or autoclink bits. wait 5ms after each command. establishes confguration link. locks to confguration link if available. 1b if not locked, sets any additional confguration bits that are mismatched between the serializer and deserializer (e.g., bws, cx/tp). wait 5ms for lock after each command. confguration changed. reestablishes confguration/video link if needed. confguration changed. locks to confguration/video link. 2 sets register 0x07 confguration bits in the serializer (dbl, bws, pxl_crc, etc.). wait 2ms. confguration changed. reestablishes confguration/video link if needed. loss-of-lock may occur. 3 sets register 0x07 confguration bits in the deserializer (dbl, bws, pxl_crc, etc.). wait 5ms for lock to reestablish. confguration changed. locks to confguration/video link. 4 writes rest of serializer/deserializer confguration bits. confguration changed. confguration changed. 5 writes camera/peripheral confguration bits. forwards commands from c to serializer. forwards commands to camera/peripherals. 5a if in confguration link, when pclk is available, set seren = 1. wait 5ms for lock. enables video link. locks to video link. table 2. link-startup procedure maxim integrated 29 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
register map offset name msb lsb 0x00 seraddr seraddr[6:0] cfg - block 0x01 desaddr desaddr[6:0] rsvd 0x02 ss ss[2:0] rsvd prng[1:0] srng[1:0] 0x03 sdiv autofm[1:0] sdiv[5:0] 0x04 main_control seren clinken prbsen sleep rsvd[1:0] revccen fwdccen 0x05 prbs_len rsvd rsvd prbs_len[1:0] rsvd rsvd rsvd rsvd 0x06 cmllvl_preemp cmllvl[3:0] preemp[3:0] 0x07 confg dbl rsvd bws es rsvd hven rsvd pxl_crc 0x08 rsvd_8 rsvd rsvd rsvd rsvd rsvd rsvd rsvd rsvd 0x09 i2c_source a i2c_src_a[6:0] rsvd 0x0a i2c_dest a i2c_dst_a[6:0] rsvd 0x0b i2c_source b i2c_src_b[6:0] rsvd 0x0c i2c_dest b i2c_dst_b[6:0] rsvd 0x0d i2c_confg i2c_loc_ ack i2c_slv_sh[1:0] i2c_mst_bt[2:0] i2c_slv_to[1:0] 0x0e gpio_en rsvd rsvd rsvd rsvd rsvd gpio_ en_2 gpio_ en_1 rsvd 0x0f gpio_out en_set_ gpo rsvd rsvd rsvd rsvd gpio_ out_2 gpio_ out_1 set_gpo 0x10 gpio_in rsvd rsvd rsvd rsvd rsvd gpio_ in_2 gpio_ in_1 gpo_l 0x11 errg errg_rate[1:0] errg_type[1:0] errg_cnt[1:0] errg_ per errg_en 0x12 rsvd_12 rsvd rsvd rsvd rsvd[4:0] 0x13 pd soft_pd rsvd rsvd rsvd rsvd rsvd rsvd[1:0] 0x14 rsvd_14 rsvd[1:0] rsvd rsvd rsvd rsvd rsvd rsvd 0x15 input_status rsvd rsvd rsvd rsvd rsvd rsvd out - puten pclkdet 0x16 rsvd_16 rsvd rsvd rsvd[5:0] 0x17 rsvd_17 rsvd[7:0] 0x18 rsvd_18 rsvd[7:0] 0x19 rsvd_19 rsvd[7:0] 0x1a rsvd_1a rsvd[7:0] 0x1b rsvd_1b rsvd[7:0] 0x1c rsvd_1c rsvd[7:0] 0x1d rsvd_1d rsvd[7:0] 0x1e id id[7:0] 0x1f revision rsvd rsvd rsvd hdcpcap revision[3:0] gmsl register map maxim integrated 30 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
offset name msb lsb 0x20 crossbar 0 rsvd force_ mux_0 invert_ mux_0 crossbar_0[4:0] 0x21 crossbar 1 rsvd force_ mux_1 invert_ mux_1 crossbar_1[4:0] 0x22 crossbar 2 rsvd force_ mux_2 invert_ mux_2 crossbar_2[4:0] 0x23 crossbar 3 rsvd force_ mux_3 invert_ mux_3 crossbar_3[4:0] 0x24 crossbar 4 rsvd force_ mux_4 invert_ mux_4 crossbar_4[4:0] 0x25 crossbar 5 rsvd force_ mux_5 invert_ mux_5 crossbar_5[4:0] 0x26 crossbar 6 rsvd force_ mux_6 invert_ mux_6 crossbar_6[4:0] 0x27 crossbar 7 rsvd force_ mux_7 invert_ mux_7 crossbar_7[4:0] 0x28 crossbar 8 rsvd force_ mux_8 invert_ mux_8 crossbar_8[4:0] 0x29 crossbar 9 rsvd force_ mux_9 invert_ mux_9 crossbar_9[4:0] 0x2a crossbar 10 rsvd force_ mux_10 invert_ mux_10 crossbar_10[4:0] 0x2b crossbar 11 rsvd force_ mux_11 invert_ mux_11 crossbar_11[4:0] 0x2c crossbar 12 rsvd force_ mux_12 invert_ mux_12 crossbar_12[4:0] 0x2d crossbar 13 rsvd force_ mux_13 invert_ mux_13 crossbar_13[4:0] 0x2e crossbar 14 rsvd force_ mux_14 invert_ mux_14 crossbar_14[4:0] 0x2f crossbar 15 rsvd force_ mux_15 invert_ mux_15 crossbar_15[4:0] 0x30 crossbar 16 rsvd force_ mux_16 invert_ mux_16 crossbar_16[4:0] 0x31 crossbar 17 rsvd force_ mux_17 invert_ mux_17 crossbar_17[4:0] 0x32 crossbar 18 rsvd force_ mux_18 invert_ mux_18 crossbar_18[4:0] 0x33 crossbar 19 rsvd force_ mux_19 invert_ mux_19 crossbar_19[4:0] 0x34 crossbar 20 rsvd force_ mux_20 invert_ mux_20 crossbar_20[4:0] gmsl register map (continued) maxim integrated 31 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
offset name msb lsb 0x35 crossbar 21 rsvd force_ mux_21 invert_ mux_21 crossbar_21[4:0] 0x36 crossbar 22 rsvd force_ mux_22 invert_ mux_22 crossbar_22[4:0] 0x37 crossbar 23 rsvd force_ mux_23 invert_ mux_23 crossbar_23[4:0] 0x38 crossbar 24 rsvd force_ mux_24 invert_ mux_24 crossbar_24[4:0] 0x39 crossbar 25 rsvd force_ mux_25 invert_ mux_25 crossbar_25[4:0] 0x3a crossbar 26 rsvd force_ mux_26 invert_ mux_26 crossbar_26[4:0] 0x3b crossbar 27 rsvd force_ mux_27 invert_ mux_27 crossbar_27[4:0] 0x3c crossbar 28 rsvd force_ mux_28 invert_ mux_28 crossbar_28[4:0] 0x3d crossbar 29 rsvd force_ mux_29 invert_ mux_29 crossbar_29[4:0] 0x3e crossbar 30 rsvd force_ mux_30 invert_ mux_30 crossbar_30[4:0] 0x3f crossbar_hs rsvd force_ mux_hs invert_ mux_hs crossbarhs[4:0] 0x40 crossbar_vs rsvd force_ mux_vs invert_ mux_vs crossbarvs[4:0] 0x41 crossbar_de rsvd force_ mux_de invert_ mux_de crossbarde[4:0] 0x42 link_confg rsvd[1:0] rsvd rsvd rsvd rsvd rsvd gpo_en 0x43 rsvd_43 rsvd rsvd rsvd rsvd rsvd rsvd rsvd [1:0] 0x44 rsvd_44 rsvd[7:0] 0x45 rsvd_45 rsvd[7:0] 0x46 rsvd_46 rsvd[7:0] 0x47 rsvd_47 rsvd[7:0] 0x48 rsvd_48 rsvd[7:0] 0x49 rsvd_49 rsvd[7:0] 0x4a rsvd_4a rsvd[7:0] 0x4b rsvd_4b rsvd[7:0] 0x4c rsvd_4c rsvd[7:0] 0x4d cxtp rsvd cxtp rsvd rsvd rsvd rsvd rsvd rsvd 0x4e rsvd_4e rsvd[7:0] 0x4f rsvd_4f rsvd[7:0] gmsl register map (continued) maxim integrated 32 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
offset name msb lsb 0x50 rsvd_50 rsvd[7:0] 0x51 rsvd_51 rsvd[7:0] 0x52 rsvd_52 rsvd[7:0] 0x53 rsvd_53 rsvd[7:0] 0x54 rsvd_54 rsvd[7:0] 0x55 rsvd_55 rsvd[7:0] 0x56 rsvd_56 rsvd[7:0] 0x57 rsvd_57 rsvd[7:0] 0x58 rsvd_58 rsvd[7:0] 0x59 rsvd_59 rsvd[7:0] 0x5a rsvd_5a rsvd[7:0] 0x5b rsvd_5b rsvd[7:0] 0x5c rsvd_5c rsvd[7:0] 0x5d rsvd_5d rsvd[7:0] 0x5e rsvd_5e rsvd[7:0] 0x5f rsvd_5f rsvd[7:0] 0x60 rsvd_60 rsvd[7:0] 0x61 rsvd_61 rsvd[7:0] 0x62 rsvd_62 rsvd[7:0] 0x63 rsvd_63 rsvd[7:0] 0x64 rsvd_64 rsvd[7:0] 0x65 rsvd_65 rsvd[7:0] 0x66 prbs_type rsvd[1:0] prbs_ type rev_ fast rsvd dis_ rwake rsvd cxsel 0x67 auto_clink rsvd[1:0] auto_ clink rsvd rsvd rsvd[2:0] 0x68 rsvd_68 rsvd rsvd[2:0] rsvd[1:0] rsvd[1:0] 0x69 rsvd_69 rsvd rsvd rsvd rsvd[4:0] 0x96 rsvd_96 rsvd rsvd rsvd rsvd rsvd rsvd rsvd[1:0] 0x97 rsvd_97 rsvd rsvd rsvd rsvd rsvd rsvd[2:0] 0x98 rsvd_98 rsvd[1:0] rsvd[2:0] rsvd[2:0] 0x99 rsvd_99 rsvd rsvd rsvd rsvd rsvd rsvd rsvd[1:0] 0x9a rsvd_9a rsvd[1:0] rsvd[1:0] rsvd rsvd[1:0] rsvd 0xc8 rsvd_c8 rsvd rsvd rsvd rsvd rsvd rsvd rsvd rsvd gmsl register map (continued) maxim integrated 33 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
seraddr (0x00) bit 7 6 5 4 3 2 1 0 field seraddr[6:0] cfgblock reset 1000000b 0b access type write, read write, read bitfield bits description decode seraddr 7:1 serializer address: serializer device address 0000000: write/read device address is 0x00/0x01 0000001: write/read device address is 0x02/0x03 1111111: write/read device address is 0xfe/0xff cfg - block 0 confguration block: set to 1 to make all registers read-only. power-on reset to clear this bit. 0: make all registers read/write 1: make all registers read-only desaddr (0x01) bit 7 6 5 4 3 2 1 0 field desaddr[6:0] rsvd reset 1001000b 0b access type write, read write, read bitfield bits description decode desaddr 7:1 deserializer address: deserializer device address 0000000: write/read device address is 0x00/0x01 0000001: write/read device address is 0x02/0x03 1111111: write/read device address is 0xfe/0xff rsvd 0 reserved: do not change from default value 0: reserved offset name msb lsb 0xc9 rsvd_c9 rsvd[7:0] 0xfc rsvd_fc rsvd rsvd rsvd rsvd rsvd rsvd rsvd rsvd 0xfd rsvd_fd rsvd[7:0] 0xfe rsvd_fe rsvd[3:0] rsvd[3:0] 0xff rsvd_ff rsvd rsvd rsvd rsvd rsvd[3:0] gmsl register map (continued) maxim integrated 34 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
ss (0x02) bit 7 6 5 4 3 2 1 0 field ss[2:0] rsvd prng[1:0] srng[1:0] reset 000b 1b 11b 11b access type write, read write, read write, read write, read bitfield bits description decode ss 7:5 spread spectrum: spread-spectrum setting 000: spread is off 001: 0.5% spread setting 010: 1.5% spread setting 011: 2% spread setting 100: spread is off 101: 1% spread setting 110: 3% spread setting 111: 4% spread setting rsvd 4 reserved: do not change from default value 1: reserved prng 3:2 pixel clock range: pixel clock-range selection stated ranges depend on dbl = setting 00: select 12.5mhz to 25mhz (dbl = 0) or 25mhz to 50mhz (dbl = 1) pixel clock range 01: select 25mhz to 58mhz (dbl = 0) or 50mhz to 116mhz (dbl = 1) pixel clock range 10: automatically detect pixel clock range 11: automatically detect pixel clock range. srng 1:0 serial-data rate range 00: 0.5gbps to 1gbps serial-data range 01: 1gbps to 1.74gbps serial-data range 10: automatically detect serial-data range 11: automatically detect serial-data range sdiv (0x03) bit 7 6 5 4 3 2 1 0 field autofm[1:0] sdiv[5:0] reset 00b 000000b access type write, read write, read bitfield bits description decode autofm 7:6 automatic frequency modulation: modulation- rate calibration interval 00: calibration occurs once 01: calibration occurs every 2ms 10: calibration occurs every 16ms 11: calibration occurs every 256ms sdiv 5:0 sawtooth divider: sawtooth divider value 0x00 sets the sawtooth divider to autocalibrate mode 000000: sawtooth divider automatically calibrates the divider value 000001: sawtooth divider set to 1 111111: sawtooth divider set to 63 maxim integrated 35 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
main_control (0x04) bit 7 6 5 4 3 2 1 0 field seren clinken prbsen sleep rsvd[3:2] revccen fwdccen reset 1b 0b 0b 0b 01b 1b 1b access type write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode seren 7 serialization enable: requires a valid pclk for serialization 0: disable serialization 1: enable serialization clinken 6 confguration link enable: confguration link enabled only when the video link is not enabled (seren = 1) 0: disable confguration link 1: enable confguration link prbsen 5 prbs test enable: see the prbs test section for more details 0: disable prbs test 1: enable prbs test sleep 4 sleep mode enable: activates sleep mode (see the shutdown/sleep modes section for more information) 0: disable sleep mode 1: enable sleep mode rsvd 3:2 reserved: do not change from default value 01: reserved revccen 1 reverse control-channel enable: enable reverse control-channel receiver (data from deserializer) 0: disable reverse control-channel receiver 1: enable reverse control-channel receiver fwdccen 0 forward control channel enable: enable forward control channel receiver (data to deserializer) 0: disable forward control channel transmitter 1: enable forward control channel transmitter prbs_len (0x05) bit 7 6 5 4 3 2 1 0 field rsvd rsvd prbs_len[1:0] rsvd rsvd rsvd rsvd reset 0b 0b 00b 0b 0b 0b 0b access type write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved rsvd 6 reserved: do not change from default value 0: reserved prbs_len 5:4 prbs length: prbs test pattern length 00: continuous bit pattern (infnite length) 01: 9.8mbit length 10: 167.1mbit length 11: 1341.5mbit length rsvd 3 reserved: do not change from default value 0: reserved rsvd 2 reserved: do not change from default value 0: reserved rsvd 1 reserved: do not change from default value 0: reserved rsvd 0 reserved: do not change from default value 0: reserved maxim integrated 36 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
cmllvl_preemp (0x06) bit 7 6 5 4 3 2 1 0 field cmllvl[3:0] preemp[3:0] reset 10x0b 0000b access type write, read write, read bitfield bits description decode cmllvl 7:4 cml level: output cml signal level = (register value) x 50mv default level depends on cable type (cxtp) 0000: do not use 0001: do not use 0010: 100mv output 0011: 150mv output 0100: 200mv output 0101: 250mv output 0110: 300mv output 0111: 350mv output 1000: 400mv output (stp default) 1001: 450mv output 1010: 500mv output (coax default) 1011: do not use 1100: do not use 1101: do not use 111x: do not use preemp 3:0 preemphasis level: preemphasis setting 0000: preemphasis off 0001: 1.2db deemphasis 0010: 2.5db deemphasis 0011: 4.1db deemphasis 0100: 6.0db deemphasis 0101: do not use 011x: do not use 1000: 1.1db preemphasis 1001: 2.2db preemphasis 1010: 3.3db preemphasis 1011: 4.4db preemphasis 1100: 6.0db preemphasis 1101: 8.0db preemphasis 1110: 10.5db preemphasis 1111: 14.0db preemphasis maxim integrated 37 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
confg (0x07) bit 7 6 5 4 3 2 1 0 field dbl rsvd bws es rsvd hven rsvd pxl_crc reset 0b 0b 0b 0b 0b 0b 0b 0b access type write, read write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode dbl 7 double-input mode enable: set high to enable double-input mode 0: single-input mode 1: double-input mode rsvd 6 reserved: do not change from default value 0: reserved bws 5 bus-width select 0: 24-bit and high-bandwidth mode 1: 32-bit mode es 4 edge select 0: parallel data clocked in on rising edge 1: parallel data clocked in on falling edge rsvd 3 reserved: do not change from default value 0: reserved hven 2 hsync/vsync encoding enable 0: disable hs/vs encoding 1: enable hs/vs encoding rsvd 1 reserved: do not change from default value 0: reserved pxl_crc 0 pixel crc type: pixel error-detection type 0: serial data uses 1-bit parity 1: serial data uses 6-bit crc rsvd_8 (0x08) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd rsvd rsvd rsvd rsvd reset 0b 0b 0b 0b 0b 0b 0b 0b access type write, read write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved rsvd 6 reserved: do not change from default value 0: reserved rsvd 5 reserved: do not change from default value 0: reserved rsvd 4 reserved: do not change from default value 0: reserved rsvd 3 reserved: do not change from default value 0: reserved rsvd 2 reserved: do not change from default value 0: reserved rsvd 1 reserved: do not change from default value 0: reserved rsvd 0 reserved: do not change from default value 0: reserved maxim integrated 38 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
i2c_source (0x09, 0x0b) bit 7 6 5 4 3 2 1 0 field i2c_src[6:0] rsvd reset 0000000b 0b access type write, read write, read bitfield bits description decode i2c_src 7:1 i 2 c source: i 2 c address translator source 0000000: write/read device address is 0x00/0x01 0000001: write/read device address is 0x02/0x03 1111111: write/read device address is 0xfe/0xff rsvd 0 reserved: do not change from default value 0: reserved i2c_dest (0x0a, 0x0c) bit 7 6 5 4 3 2 1 0 field i2c_dst[6:0] rsvd reset 0000000b 0b access type write, read write, read bitfield bits description decode i2c_dst 7:1 i 2 c destination: i 2 c address translator destination 0000000: write/read device address is 0x00/0x01 0000001: write/read device address is 0x02/0x03 1111111: write/read device address is 0xfe/0xff rsvd 0 reserved: do not change from default value 0: reserved maxim integrated 39 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
i2c_confg (0x0d) bit 7 6 5 4 3 2 1 0 field i2c_loc_ ack i2c_slv_sh[1:0] i2c_mst_bt[2:0] i2c_slv_to[1:0] reset 1b 01b 101b 10b access type write, read write, read write, read write, read bitfield bits description decode i2c_loc_ ack 7 i 2 c local acknowledge: i 2 c-to-i 2 c slave generates local acknowledge when forward channel is not available 0: do not send local autoacknowledge when control channel is absent 1: send local autoacknowledge when control channel is absent i2c_slv_ sh 6:5 i 2 c slave setup/hold time: i 2 c-to-i 2 c slave setup and hold-time setting (setup, hold) (typ) 00: (352ns, 117ns) setup/hold time 01: (469ns, 234ns) setup/hold time 10: (938ns, 352ns) setup/hold time 11: (1406ns, 469ns) setup/hold time i2c_mst_ bt 4:2 i 2 c master bit rate: i 2 c-to-i 2 c master bit-rate setting (min, typ, max) 000: (6.61, 8.47, 9.92) kbps 001: (22.1, 28.3, 33.2) kbps 010: (66.1, 84.7, 99.2) kbps 011: (82, 105, 123) kbps 100: (136, 173, 203) kbps 101: (265, 339, 397) kbps 110: (417, 533, 625) kbps 111: (654, 837, 980) kbps i2c_slv_ to 1:0 i 2 c slave timeout: i 2 c-to-i 2 c slave remote-side timeout setting (typ). 00: 64s slave timeout 01: 256s slave timeout 10: 1024s slave timeout 11: slave timeout disabled maxim integrated 40 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
gpio_en (0x0e) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd rsvd gpio_en_2 gpio_en_1 rsvd reset 0b 0b 0b 0b 0b 0b 0b 0b access type write, read write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved rsvd 6 reserved: do not change from default value 0: reserved rsvd 5 reserved: do not change from default value 0: reserved rsvd 4 reserved: do not change from default value 0: reserved rsvd 3 reserved: do not change from default value 0: reserved gpio_en_2 2 gpio enable: disabled by default 0: pin functions as a parallel input 1: pin functions as a gpio gpio_en_1 1 gpio enable: disabled by default 0: pin functions as parallel input 1: pin functions as gpio rsvd 0 reserved: do not change from default value 0: reserved gpio_out (0x0f) bit 7 6 5 4 3 2 1 0 field en_set_ gpo rsvd rsvd rsvd rsvd gpio_ out_2 gpio_ out_1 set_gpo reset 0b 0b 1b 1b 1b 1b 1b 0b access type write, read write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode en_set_gpo 7 enable set gpo: set to 1 to enable setting of gpo from set_gpo 0: disable setting of gpo through set_gpo 1: enable setting of gpo through set_gpo rsvd 6 reserved: do not change from default value 0: reserved rsvd 5 reserved: do not change from default value 1: reserved rsvd 4 reserved: do not change from default value 1: reserved rsvd 3 reserved: do not change from default value 1: reserved gpio_out_2 2 gpio output level: pull down gpio when 0 0: set gpio output level low 1: set gpio output level high gpio_out_1 1 gpio output level: pull down gpio when 0 0: set gpio output level low 1: set gpio output level high set_gpo 0 set gpo level: set gpo output high or low (when en_set_gpo = 1) 0: set gpo output low 1: set gpo output high maxim integrated 41 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
gpio_in (0x10) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd rsvd gpio_in_2 gpio_in_1 gpo_l reset 0b 0b 0b 0b 0b xb xb 0b access type read only read only read only read only read only read only read only read only bitfield bits description decode rsvd 7 reserved 0: reserved rsvd 6 reserved 0: reserved rsvd 5 reserved x: reserved rsvd 4 reserved x: reserved rsvd 3 reserved x: reserved gpio_in_2 2 gpio input level: input pin level of gpio 0: gpio input is low 1: gpio input is high gpio_in_1 1 gpio input level: input pin level of gpio 0: gpio input is low 1: gpio input is high gpo_l 0 gpo output level 0: gpi output level is low 1: gpo output level is high errg (0x11) bit 7 6 5 4 3 2 1 0 field errg_rate[1:0] errg_type[1:0] errg_cnt[1:0] errg_per errg_en reset 0b 0b 0b 0b 0b access type write, read write, read write, read write, read write, read bitfield bits description decode errg_rate 7:6 error-generation rate: error-generation rate, on average 00: generate errors every 2560 bits 01: generate errors every 40,960 bits 10: generate errors every 655,360 bits 11: generate errors every 10,485,760 bits errg_type 5:4 error-generation type: type of generated errors 00: single-bit errors 01: 2 8b/10b symbols 10: 3 8b/10b symbols 11: 4 8b/10b symbols errg_cnt 3:2 error-generation count: number of generated errors 00: generate errors continuously 01: generate16 errors 10: generate 128 errors 11: generate 1024 errors errg_per 1 periodic error generation enable 0: generator creates errors randomly (based on error rate) 1: generator creates errors periodically (based on error rate) errg_en 0 error generator enable 0: disable error generator 1: enable error generator maxim integrated 42 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
rsvd_12 (0x12) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd[4:0] reset 0b 1b 0b 00000b access type write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved rsvd 6 reserved: do not change from default value 1: reserved rsvd 5 reserved: do not change from default value 0: reserved rsvd 4:0 reserved: do not change from default value 00000: reserved pd (0x13) bit 7 6 5 4 3 2 1 0 field soft_pd rsvd rsvd rsvd rsvd rsvd rsvd[1:0] reset 0b 0b 0b 0b 0b 0b 10b access type write 1 to set, read write, read write, read write, read write, read write, read write, read bitfield bits description decode soft_pd 7 soft power down: set this bit to 1 to reset the device; this bit is cleared after the device resets 0: normal operation 1: reset the device (bit clears itself) rsvd 6 reserved: do not change from default value 0: reserved rsvd 5 reserved: do not change from default value 0: reserved rsvd 4 reserved: do not change from default value 0: reserved rsvd 3 reserved: do not change from default value 0: reserved rsvd 2 reserved: do not change from default value 0: reserved rsvd 1:0 reserved: do not change from default value 10: reserved rsvd_14 (0x14) bit 7 6 5 4 3 2 1 0 field rsvd[1:0] rsvd rsvd rsvd rsvd rsvd rsvd reset xxb xb xb xb xb xb xb access type read only read only read only read clears all read only read only read only bitfield bits description decode rsvd 7:6 reserved xx: reserved rsvd 5 reserved x: reserved rsvd 4 reserved x: reserved rsvd 3 reserved x: reserved rsvd 2 reserved x: reserved rsvd 1 reserved x: reserved rsvd 0 reserved x: reserved maxim integrated 43 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
input_status (0x15) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd rsvd rsvd outputen pclkdet reset xb xb xb 0b 0b 0b xb xb access type read only read only write, read read only read only read only read only read only bitfield bits description decode rsvd 7 reserved x: reserved rsvd 6 reserved x: reserved rsvd 5 reserved x: reserved rsvd 4 reserved 0: reserve d rsvd 3 reserved 0: reserved rsvd 2 reserved 0 : reserved outputen 1 output enabled 0: output disabled 1: output enabled pclkdet 0 pclk detected: valid pclk detected 0: no valid pclk detected 1: valid pclk detected rsvd_16 (0x16) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd[5:0] reset 0b xb xxxxxxb access type read only read clears all read only bitfield bits description decode rsvd 7 reserved 0: reserved max_rt_err 6 reserved x: reserved rsvd 5:0 reserved xxxxxx: reserved rsvd_17 (0x17) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset xxxxxxxxb access type read only bitfield bits description decode rsvd 7:0 reserved xxxxxxxx: reserved maxim integrated 44 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
rsvd (0x18 to 0x1b) bit 7 6 5 4 3 2 1 0 field rsvd reset xxxxxxxxb access type read only bitfield bits description decode rsvd 7:0 reserved xxxxxxxx: reserved rsvd (0x1c) bit 7 6 5 4 3 2 1 0 field rsvd reset xxxxxxxxb access type read only bitfield bits description decode rsvd 7:0 reserved xxxxxxxx: reserved rsvd_1d (0x1d) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset xxxxxxxxb access type read only bitfield bits description decode rsvd 7:0 reserved xxxxxxxx: reserved id (0x1e) bit 7 6 5 4 3 2 1 0 field id[7:0] reset xxxxxxxxb access type read only bitfield bits description decode id 7:0 device id: 8-bit value depends on the gmsl device attached 01000111 device is a max96709 maxim integrated 45 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
revision (0x1f) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd hdcpcap revision[3:0] reset 0b 0b 0b xb xxxxb access type read only read only read only read only read only bitfield bits description decode rsvd 7 reserved 0: reserved rsvd 6 reserved 0: reserved rsvd 5 reserved 0: reserved hdcpcap 4 hdcp capability: 1 = hdcp capable 0: device does not have hdcp 1: device is hdcp capable revision 3:0 device revision 0000: value is 0 0001: value is 1 1111: value is 15 crossbar (0x20 to 0x3e) bit 7 6 5 4 3 2 1 0 field rsvd force_ mux invert_ mux crossbar[4:0] reset 0b 0b 0b xxxxxb access type write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved force_ mux 6 force mux output 0: input mapped to mux output 1: force mux output low invert_ mux 5 invert mux output 0: do not invert mux output 1: invert mux output cross - bar 4:0 crossbar setting select 1 of 32 input signals. default values connect mux n with input n for fow-through routing (i.e., din_ mapped to dout_). 00000: mux outputs data from input 0 00001: mux outputs data from input 1 11111: mux outputs data from input 31 maxim integrated 46 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
crossbar_hs (0x3f) bit 7 6 5 4 3 2 1 0 field rsvd force_ mux_hs invert_ mux_hs crossbarhs[4:0] reset 0b 0b 0b 01100b access type write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved force_ mux_hs 6 force mux output 0: input mapped to mux output 1: force mux output low invert_ mux_hs 5 invert mux output 0: do not invert mux output 1: invert mux output cross - barhs 4:0 crossbar setting hs: select 1 of 16 input pins for hs. default values connect hs with the corresponding named input pin. unconnected inputs (din14, din15) are internally connected low. 00000: mux sync signal from din0 00001: mux sync signal from din1 01111: mux sync signal from din15 1xxxx: do not use crossbar_vs (0x40) bit 7 6 5 4 3 2 1 0 field rsvd force_ mux_vs invert_ mux_vs crossbarvs[4:0] reset 0b 0b 0b 01101b access type write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved force_ mux_vs 6 force mux output 0: input mapped to mux output 1: force mux output low invert_ mux_vs 5 invert mux output 0: do not invert mux output 1: invert mux output cross - barvs 4:0 crossbar setting vs: select 1 of 16 input pins for vs. default values connect vs with the correspond - ing named input pin. unconnected inputs (din14, din15) are internally connected low. 00000: mux sync signal from din0 00001: mux sync signal from din1 01111: mux sync signal from din15 1xxxx: do not use maxim integrated 47 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
crossbar_de (0x41) bit 7 6 5 4 3 2 1 0 field rsvd force_ mux_de invert_ mux_de crossbarde[4:0] reset 0b 0b 0b 01011b access type write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved force_ mux_de 6 force mux output 0: input mapped to mux output. 1: force mux output low. invert_ mux_de 5 invert mux output 0: do not invert mux output. 1: invert mux output. cross - barde 4:0 crossbar setting de: select 1 of 16 input pins for de. default values connect de with din11. unconnected inputs (din14, din15) are internally connected low. 00000: mux sync signal from din0 00001: mux sync signal from din1 01111: mux sync signal from din15 1xxxx: do not use link_confg (0x42) bit 7 6 5 4 3 2 1 0 field rsvd[1:0] rsvd rsvd rsvd rsvd rsvd gpo_en reset 01b 0b 1b 1b 0b 1b 1b access type write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7:6 reserved: do not change from default value 01: reserved rsvd 5 reserved: do not change from default value 0: reserved rsvd 4 reserved: do not change from default value 1: reserved rsvd 3 reserved: do not change from default value 1: reserved rsvd 2 reserved: do not change from default value 0: reserved rsvd 1 reserved: do not change from default value 1: reserved gpo_en 0 gpo enable: enable gpo pin 0: disable gpo pin 1: enable gpo pin maxim integrated 48 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
rsvd_43 (0x43) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd rsvd rsvd rsvd[1:0] reset 0b 0b 0b 0b 0b 1b 01b access type write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved rsvd 6 reserved: do not change from default value 0: reserved rsvd 5 reserved: do not change from default value 0: reserved rsvd 4 reserved: do not change from default value 0: reserved rsvd 3 reserved: do not change from default value 0: reserved rsvd 2 reserved: do not change from default value 1: reserved rsvd 1:0 reserved: do not change from default value 01: reserved rsvd (0x44 to 0x46) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000:reserved rsvd (0x47 to 0x49) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000:reserved rsvd (0x4a to 0x4c) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000:reserved maxim integrated 49 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
cxtp (0x4d) bit 7 6 5 4 3 2 1 0 field rsvd cxtp rsvd rsvd rsvd rsvd rsvd rsvd reset xb 0b 0b 0b 0b 0b 0b 0b access type write, read write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value x: reserved cxtp 6 coax/twisted-pair select: default to stp mode 0: use differential output (stp mode) 1: use dual single ended outputs (coax) rsvd 5 reserved: do not change from default value 0: reserved rsvd 4 reserved: do not change from default value 0: reserved rsvd 3 reserved: do not change from default value 0: reserved rsvd 2 reserved: do not change from default value 0: reserved rsvd 1 reserved: do not change from default value 0: reserved rsvd 0 reserved: do not change from default value 0: reserved rsvd (0x4e to 0x50) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000:reserved rsvd (0x51 to 0x53, 0x5d to 0x5f) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000:reserved maxim integrated 50 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
rsvd (0x56, 0x57) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000:reserved rsvd (0x58, 0x59) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000:reserved rsvd (0x5a to 0x5c) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000:reserved rsvd (0x60, 0x61) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000:reserved rsvd (0x54, 0x55) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000:reserved maxim integrated 51 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
rsvd (0x62, 0x63) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000:reserved rsvd (0x64, 0x65) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000:reserved prbs_type (0x66) bit 7 6 5 4 3 2 1 0 field rsvd[1:0] prbs_ type rev_fast rsvd dis_ rwake rsvd cxsel reset 01b 1b 0b 0b 0b 0b 1b access type write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7:6 reserved: do not change from default value 01: reserved prbs_ type 5 prbs type: prbs type select 0: select legacy prbs mode 1: select max9271Cmax9273 prbs mode rev_ fast 4 reverse channel fast-mode enable 0: disable reverse channel fast mode 1: enable reverse channel fast mode rsvd 3 reserved: do not change from default value 0: reserved dis_ rwake 2 disable remote wake-up: disable wake-up receiver 0: do not disable remote wake-up receiver 1: disable remote wake-up receiver rsvd 1 reserved: do not change from default value 0: reserved cxsel 0 coax select 0: coax cable connected to inverting output 1: coax cable connected to noninverting output maxim integrated 52 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
auto_clink (0x67) bit 7 6 5 4 3 2 1 0 field rsvd[1:0] auto_ clink rsvd rsvd rsvd[2:0] reset 11b 0b 0b 0b 111b access type write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7:6 reserved: do not change from default value 11: reserved auto_ clink 5 auto confguration link: automatic control of confguration link 0: enable confguration link only when clinken = 1 and seren = 0 1: automatically enable confguration link when seren = 1 and pclkdet = 0 rsvd 4 reserved: do not change from default value 0: reserved rsvd 3 reserved: do not change from default value 0: reserved rsvd 2:0 reserved: do not change from default value 111: reserved rsvd_68 (0x68) bit 7 6 5 4 3 2 1 0 field rsvd rsvd[2:0] rsvd[1:0] rsvd[1:0] reset 0b 001b 10b 01b access type write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved rsvd 6:4 reserved: do not change from default value 001: reserved rsvd 3:2 reserved: do not change from default value 10: reserved rsvd 1:0 reserved: do not change from default value 00: reserved rsvd_69 (0x69) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd[4:0] reset 0b 0b 0b 01101 access type write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved rsvd 6 reserved: do not change from default value 0: reserved rsvd 5 reserved: do not change from default value 0: reserved rsvd 4:0 reserved: do not change from default value 01101: reserved maxim integrated 53 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
rsvd_96 (0x96) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd rsvd rsvd rsvd[1:0] reset 0b 0b 0b 0b 0b 1b 10b access type write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved rsvd 6 reserved: do not change from default value 0: reserved rsvd 5 reserved: do not change from default value 0: reserved rsvd 4 reserved: do not change from default value 0: reserved rsvd 3 reserved: do not change from default value 0: reserved rsvd 2 reserved: do not change from default value 1b: reserved rsvd 1:0 reserved: do not change from default value 10: reserved rsvd_97 (0x97) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd rsvd rsvd[2:0] reset 0b 0b 0b 1b 1b 111b access type write, read write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved rsvd 6 reserved: do not change from default value 0: reserved rsvd 5 reserved: do not change from default value 0: reserved rsvd 4 reserved: do not change from default value 1: reserved rsvd 3 reserved: do not change from default value 1: reserved rsvd 2:0 reserved: do not change from default value 111: reserved rsvd_98 (0x98) bit 7 6 5 4 3 2 1 0 field rsvd[1:0] rsvd[2:0] rsvd[2:0] reset 01b 001b 010b access type write, read write, read write, read bitfield bits description decode rsvd 7:6 reserved: do not change from default value 01: reserved rsvd 5:3 reserved: do not change from default value 001: reserved rsvd 2:0 reserved: do not change from default value 010: reserved maxim integrated 54 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
rsvd_99 (0x99) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd rsvd rsvd rsvd[1:0] reset 0b 0b 0b 0b 1b 1b 01b access type write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved rsvd 6 reserved: do not change from default value 0: reserved rsvd 5 reserved: do not change from default value 0: reserved rsvd 4 reserved: do not change from default value 0: reserved rsvd 3 reserved: do not change from default value 1: reserved rsvd 2 reserved: do not change from default value 1: reserved rsvd 1:0 reserved: do not change from default value 01: reserved rsvd_9a (0x9a) bit 7 6 5 4 3 2 1 0 field rsvd[1:0] rsvd[1:0] rsvd rsvd[1:0] rsvd reset 00b 01b 0b 00b 0b access type write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7:6 reserved: do not change from default value 00: reserved rsvd 5:4 reserved: do not change from default value 01: reserved rsvd 3 reserved: do not change from default value 0: reserved rsvd 2:1 reserved: do not change from default value 00: reserved rsvd 0 reserved: do not change from default value 0: reserved rsvd_c8 (0xc8) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd rsvd[1:0] rsvd[1:0] reset 0b xb xb xb 10b 10b access type read only read only read only read only read only read only bitfield bits description decode rsvd 7 reserved 0: reserved rsvd 6 reserved x: reserved rsvd 5 reserved x: reserved rsvd 4 reserved x: reserved rsvd 3:2 reserved 10: reserved rsvd 1:0 reserved 10: reserved maxim integrated 55 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
rsvd_c9 (0xc9) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset xxxxxxxxb access type read only bitfield bits description decode rsvd 7:0 reserved xxxxxxxx: reserved rsvd_fc (0xfc) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd rsvd rsvd rsvd rsvd reset 0b 0b 0b 0b 0b 0b 0b 0b access type write, read write, read write, read write, read write, read write, read write, read write, read bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved rsvd 6 reserved: do not change from default value 0: reserved rsvd 5 reserved: do not change from default value 0: reserved rsvd 4 reserved: do not change from default value 0: reserved rsvd 3 reserved: do not change from default value 0: reserved rsvd 2 reserved: do not change from default value 0: reserved rsvd 1 reserved: do not change from default value 0: reserved rsvd 0 reserved: do not change from default value 0: reserved rsvd_fd (0xfd) bit 7 6 5 4 3 2 1 0 field rsvd[7:0] reset 00000000b access type write, read bitfield bits description decode rsvd 7:0 reserved: do not change from default value 00000000: reserved maxim integrated 56 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
bitfield bits description decode rsvd 7 reserved: do not change from default value 0: reserved rsvd 6 reserved: do not change from default value 0: reserved rsvd 5 reserved: do not change from default value 0: reserved rsvd 4 reserved: do not change from default value 0: reserved rsvd 3:0 reserved xxxx: reserved rsvd_fe (0xfe) bit 7 6 5 4 3 2 1 0 field rsvd[3:0] rsvd[3:0] reset 0000b 0000b access type write, read write, read bitfield bits description decode rsvd 7:4 reserved: do not change from default value 0000: reserved rsvd 3:0 reserved: do not change from default value 0000: reserved rsvd_ff (0xff) bit 7 6 5 4 3 2 1 0 field rsvd rsvd rsvd rsvd rsvd[3:0] reset 0b 0b 0b 0b xxxxb access type write, read write, read write, read write, read read only maxim integrated 57 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
*the input bit width is limited by the number of available inputs. applications information parallel interface the cmos parallel interface-data width is programmable and depends on the application. using a larger width (bws = 1) results in a lower-pixel clock rate, while a smaller width (bws = 0) allows a higher-pixel clock rate. bus data width the bus data width depends on the selected modes. the available bus width is less when using error detection or when in double mode (dbl = 1). table 3 shows the avail - able bit widths and default mapping for various modes. bus data rates the bus data rate depends on the settings for bws and dbl. table 4 lists the available pclk rates available for different bus-width settings. for lower pclk rates, set dbl = 0 (if dbl = 1 in both the serializer and deserializer). register bit settings input mapping dbl bws pxl_crc hven 1 1 1 1 din11:0, hs, vs 1 1 1 0 din11:0 1 1 0 1 din11:0 * , hs, vs 1 1 0 0 din13:0* 1 0 1 1 din7:0, hs, vs 1 0 1 0 din7:0 1 0 0 1 din10:0, hs, vs 1 0 0 0 din10:0 0 1 1 1 din11:0*, hs, vs 0 1 1 0 din13:0* 0 1 0 1 din11:0*, hs, vs 0 1 0 0 din13:0* 0 0 1 1 din11:0*, hs, vs 0 0 1 0 din13:0* 0 0 0 1 din11:0*, hs, vs 0 0 0 0 din13:0* dbl bws pclk range (mh z ) 1 1 25 to 87 1 0 33.3 to 116 0 1 12.5 to 43.5 0 0 16.7 to 58 table 3. input data-width selection table 4. data-rate selection maxim integrated 58 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
crossbar switch by default, the crossbar switch connects the serializer input pins din_ and hs/vs (when hv encoding is used) to the corresponding deserializer output pins dout_ and hs/vs. reprogram the crossbar switch when changing the input or output pin assignments, or when connecting to devices that do not have a dbl = 1 mode. crossbar-switch programming each crossbar-switch output can select any of the 14 din_ inputs for either high or low words (when dbl = 1) for a total of 32 possible inputs. multiple outputs can share the same input. hs, vs, and de remain the same for both word halves, and should be programmed to use the low-word input of the corresponding pin. to invert an input data bit, set the respective invert_mux_ = 1. to force an output low, (and ignore the input) set the force_mux_ bit = 1. to force an output high set both invert_mux_ and force_mux_ = 1. recommended crossbar-switch program procedure the procedure to program the crossbar switch depends on the dbl settings on the serdes. devices without double mode can be assumed to have dbl = 0. both devices' dbl set to the same value 1. for the crossbar-output equivalent of din0 (xbo0, xbo16) select which pin to map (e.g., din4 ? xbi4, xbi20). 2. set the low- and high-input crossbar bits (crossbar0, crossbar 16) to the desired selected mapped input (e.g., crossbar0 = 00100, crossbar16 = 10100). 3. repeat for the other crossbar outputs, making sure the set of high and low crossbar outputs are assigned to the same crossbar input set. in general, xbo[i] and xbo[i+16] should be assigned to xbi[j] and xbi[j+16]. 4. for xbohs, xbovs, and xbode, set crossbar to use the low-input pins (crossbar_ = 00000 to 01111). note that hs, vs, and de use both the low and high input. figure 18. crossbar-switch default mapping xbi15* xbi 30 * xbi14* xbi 29 xbi13 xbi 28 xbi12 xbi 27 xbi11 xbi 26 xbi10 xbi 25 xbi9 xbi 24 xbi8 xbi 23 xbi7 xbi 22 xbi 6 xbi 21 xbi 5 xbi 20 xbi 4 xbi 19 xbi 3 xbi 18 xbi 2 xbi 17 xbi 1 xbi 16 xbi 0 input pin din 13 / vs din 12 / hs din 11 din 10 din 9 din 8 din 7 din 6 din 5 din 4 din 3 din 2 din 1 din 0 pclk xbi 15 * xbi 30 * xbi 14 * xbi 29 xbi 13 xbi 28 xbi 12 xbi 27 xbi 11 xbi 26 xbi 10 xbi 25 xbi 9 xbi 24 xbi 8 xbi 23 xbi 7 xbi 22 xbi 6 xbi 21 xbi 5 xbi 20 xbi 4 xbi 19 xbi 3 xbi 18 xbi 2 xbi 17 xbi 1 xbi 16 xbi 0 pixel n n + 1 xbi 31 * xbi 31 * * xbi 14 , xbi 15 , xbi 30 , xbi 31 input internally connected low . maxim integrated 59 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
i 2 c interface the control channel forwards i 2 c commands from the microcontroller side to the other side of the gmsl link. the remote device acts as an i 2 c master to the other peripherals connected to the remote-side device. i 2 c-to- i 2 c mode uses clock stretching to hold the microcontroller until the data and an acknowledge or not acknowledge have been sent across the link. i 2 c bit rate the i 2 c interface accepts bit rates from 9.6kbps to 1mbps. the local i 2 c rate is set by the microcontroller. the remote i 2 c rate is set by the remote device. by default, the control channel is set up for a 400kbps i 2 c bit rate. program the i2c_mstbt and slv_sh bits (register 0x0d) to match the desired microcontroller i 2 c rate. software programming of device addresses the serdes have programmable device addresses. this allows multiple gmsl devices, along with i 2 c peripher - als, to coexist on the same control channel. the serial - izer device address is in register 0x00 of each device, while the deserializer device address is in register 0x01 of each device. to change a device address, first write to the device whose address changes (register 0x00 of the serializer for serializer device address change, or register 0x01 of the deserializer for deserializer device address change). then, write the same address into the corresponding register on the other device (register 0x00 of the deserializer for serializer device address change, or register 0x01 of the serializer for deserializer device address change). i 2 c address translation the device supports i 2 c address translation for up to two device addresses. use address translation to assign unique device addresses to peripherals with limited i 2 c addresses. source addresses (address to translate from) are stored in registers 0x09 and 0x0b. destination addresses (address to translate to) are stored in registers 0x0a and 0x0c. confguration blocking the device can block changes to its registers. set cfgblock to make all registers read-only. once set, the registers remain blocked until the supplies are removed. cascaded/parallel devices gmsl supports both cascaded and parallel devices connected through i 2 c. when cascading or using parallel links, all i 2 c commands are forwarded to all links. each link attempts to hold the control channel until it receives an acknowledge/not acknowledge from the remote-side device. it is important to keep the control channel active between links to prevent timeout. if a link is unused, keep the control channel clear by turning on the configuration link, disconnecting the i 2 c lines, or powering down the unused device. dual c control most systems use a single microcontroller; however cs can reside on each side simultaneously and trade off in running the control channel. contention occurs if both cs attempt to use the control channel at the same time. it is up to the user to prevent this contention by imple - menting a higher level protocol. in addition, the control channel does not provide arbitration between i 2 c masters on both sides of the link. an acknowledge frame is not generated when communication fails due to contention. if communication across the serial link is not required, the cs can disable the forward and reverse control channel using the fwdccen and revccen bits (0x04, d[1:0]) in the serdes. communication across the serial link is stopped and contention between cs cannot occur. maxim integrated 60 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
device address the serializer/deserializer both have a 7-bit-long slave address stored in registers 0x00 and 0x01. the bit follow - ing a 7-bit slave address is the r/w bit, which is low for a write command and high for a read command. the default slave address is 0x80. after startup, a microcontroller can reprogram the slave address as needed. spread spectrum program the ss bits in the serializer to turn on spread spectrum in the serializer ( table 5 ). if the deserializer driven by the serializer has programmable spread spectrum, do not enable spread for both at the same time or their interaction cancels benefits. the deserializer tracks the serializers spread and passes the spread to the deserializer output. some spread-spectrum ampli - tudes can only be used at lower pclkin frequencies ( table 6 ). when the spread spectrum is turned on or off, the serial link stops for several microseconds and then restarts in order for the deserializer to lose and relock to the new serial-data stream. changing the spread- spectrum amplitude does not cause a loss of lock. manual programming of the spread-spectrum divider by default, autodetection of the pclkin operation range guarantees a spread-spectrum modulation frequency within 20khz to 40khz. additionally, manual configura - tion of the sawtooth divider (sdiv: 0x03,d[5:0]) allows the user to set a modulation frequency (typically 20khz) according to the pclkin frequency. equation: relation of modulation rate to the pclkin frequency: f m = f pclkin /(mod x sdiv) where: f m = modulation frequency f pclkin = pclkin frequency mod = modulation coefficient given in table 7 sdiv = 6-bit sdiv setting, manually programmed by the c bws = 0 mode, pclkin frequency (mh z ) bws = 1 mode, pclkin frequency (mh z ) serial link bit rate (mbps) available spread rates < 33.3 (dbl = 0) < 25 (dbl = 0) < 1000 all rates available < 66.6 (dbl = 1) < 50 (dbl = 1) 33.3 to 58 (dbl = 0) 25 to 43.5 (dbl = 0) 1000 1.5%, 1%, 0.5% 66.6 to 116 (dbl = 1) 50 to 87 (dbl = 1) table 6. spread limitations table 5. output spread ss spread (%) 000 power-up default (no spread spectrum) 001 0.5% spread spectrum 010 1.5% spread spectrum 011 2% spread spectrum 100 no spread spectrum 101 1% spread spectrum 110 3% spread spectrum 111 4% spread spectrum maxim integrated 61 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
to program the sdiv setting, first look up the modulation coefficient according to the desired bus-width and spread- spectrum settings. solve the above equation for sdiv using the desired pixel clock and modulation frequencies. if the calculated sdiv value is larger than the maximum allowed sdiv value in table 7 , set sdiv to the maximum value. board layout power-supply circuits and bypassing the serializer uses an avdd and dvdd of 1.7v to 1.9v. all inputs and outputs, except for the serial output, derive power from dvdd. proper voltage-supply bypassing is essential for high-frequency circuit stability. high-frequency signals separate the lvcmos logic signals and cml/coax high - speed signals to prevent crosstalk. use a four-layer pcb with separate layers for power, ground, cml/coax, and lvcmos logic signals. layout stp-pcb traces close to each other for a 100 differential characteristic imped - ance. the trace dimensions depend on the type of trace used (microstrip or stripline). note: two 50 pcb traces do not have 100 differential impedance when brought close together; the impedance goes down when the traces are brought closer. use a 50 trace for the single-ended output when driving coax. route the pcb traces for differential cml in parallel to maintain the differential characteristic impedance. avoid via arrays. keep pcb traces that make up a differential pair equal in length to avoid skew within the differential pair. esd protection esd tolerance is rated for human body model, iec 61000-4-2, and iso 10605. the iso 10605 and iec 61000-4-2 standards specify esd tolerance for electronic systems. the serial outputs are rated for iso 10605 esd protection and iec 61000-4-2 esd protection. all pins are tested for the human body model. the human body model discharge components are cs = 100pf and rd = 1.5k ( figure 19 ). the iec 61000-4-2 discharge compo - nents are cs = 150pf and rd = 330 ( figure 20 ). the iso 10605 discharge components are cs = 330pf and rd = 2k ( figure 21 ). table 7. modulation coefficients and maximum sdiv settings bws spread- spectrum setting (%) modulation coefficient (dec) sdiv upper limit (dec) 1 1 104 40 0.5 104 63 3 152 27 1.5 152 54 4 204 15 2 204 30 0 1 80 52 0.5 80 63 3 112 37 1.5 112 63 4 152 21 2 152 42 figure 21. iso 10605 contact discharge esd test circuit figure 19. human body model esd test circuit figure 20. iec 61000-4-2 contact discharge esd test circuit storage capacitor high- voltage dc source device under test charge-current- limit resistor discharge resistance 1m? r d 1.5k? c s 100pf c s 150pf storage capacitor high- voltage dc source device under test charge-current- limit resistor discharge resistance r d 330? storage capacitor high- voltage dc source device under test charge-current- limit resistor discharge resistance r d 2k? c s 330pf maxim integrated 62 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
compatibility with other gmsl devices the device is designed to pair with the max96705C max96711 family of devices, but interoperates with any gmsl device. see table 8 for operating limitations. device confguration and component selection internal input pulldowns the control and configuration inputs include a pulldown resistor to gnd; external pulldown resistors are not needed. multifunction gpo/him functions as the gpo output, and as a configuration pin. on power-up, or when reverting from a power-down state, the pins act as the him input. after latching the input state, the pin becomes the gpo output. connect a configuration input through a 30k resistor to dvdd to set a high level. leave the configuration input open to set a low level. i 2 c pullup resistors the i 2 c open-drain lines require a pullup resistor to provide a logic-high level. there are tradeoffs between power dissipation and speed, and a compromise may be required when choosing pullup resistor values. every device connected to the bus introduces some capaci - tance even when the device is not in operation. i 2 c speci - fies 300ns rise times (30% to 70%) for fast mode, which is defined for data rates up to 400kbps (see the i 2 c port timing section in the ac electrical characteristics table for details). to meet the fast-mode rise-time requirement, choose the pullup resistors so that rise time t r = 0.85 x r pullup x c bus < 300ns. the waveforms are not rec - ognized if the transition time becomes too slow. gmsl supports i 2 c rates up to 1mbps. ac-coupling capacitors voltage droop and the digital-sum variation (dsv) of transmitted symbols cause signal transitions to start from different voltage levels. because the transition time is fixed, starting the signal transition from different voltage levels causes timing jitter. the time constant for an ac-coupled link needs to be chosen to reduce droop and jitter to an acceptable level. the rc network for an ac-coupled link consists of the cml/coax receiver termination resistor (r tr ), the cml/coax-driver ter - mination resistor (r td ), and the series ac-coupling capacitors (c). the rc time constant for four equal-value series capacitors is (c x (r td + r tr ))/4. r td and r tr are required to match the transmission-line impedance (usually 100 differential, 50 single-ended). this leaves the capacitor selection to change the system time con - stant. use 0.2f or larger high-frequency, surface-mount ceramic capacitors with sufficient voltage rating to with - stand a short to battery, to pass the lower speed reverse control-channel signal. use capacitors with a case size less than 3.2mm x 1.6mm to have lower-parasitic effects to the high-speed signal. serializer feature gmsl deserializer hsync/vsync encoding if feature not supported in the deserializer, turn off in the serializer. i 2 c to i 2 c if feature not supported in the deserializer, do not use control channel. crc error detection if feature not supported in the deserializer, turn off in the serializer. double input if feature not supported in the deserializer, data is output as a single word at half the input frequency. use crossbar switch to correct input mapping. coax if feature not supported in the deserializer, connect unused serial input through 200nf and 50 in series to avdd, and set the reverse control-channel amplitude to 100mv. i 2 s encoding if supported in the deserializer, disable i 2 s in the deserializer. high-immunity mode if feature not supported in the deserializer, turn off in the serializer. low-speed mode if supported in the deserializer, set drs to 0 in the deserializer. table 8. feature compatibility maxim integrated 63 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
cables and connectors interconnect for cml typically has a differential imped - ance of 100. use cables and connectors that have matched differential impedance to minimize impedance discontinuities. coax cables typically have a characteristic impedance of 50; contact the factory for 75 operation). table 9 lists the suggested cables and connectors used in the gmsl link. prbs the serializer includes a prbs pattern generator that works with bit-error verification in the deserializer. to run the prbs test, set prbsen = 1 (0x04, d5) in the deserializer, then in the serializer. to exit the prbs test, set prbsen = 0 (0x04, d5) in the serializer. the deserializer automatically ends prbs checking and sets the prbs_ok bit high. during prbs mode, the forward control channel is not available except to exit prbs mode if autoacknowledge is enabled in the deserializer; other - wise, the remote control channel is not available at all. to run the prbs with a 3gbps serdes, first set the prbs_type bit = 0 in the max967xx. then set prbsen = 1 (0x04, d5) in the serializer and then in the deserial - izer. to exit the prbs test, set prbsen = 0 (0x04, d5) in the deserializer, then in the serializer. during prbs test, errb function changes to reflect prbs errors only. errb goes low when any prbs errors occur. errb goes high when the prbs error counter is reset when prbs_err is read. normal errb function resumes when exiting the prbs test. gpi/gpo gpo on the serializer follows gpi transitions on the deserializer. by default, the gpi-to-gpo delay is 0.35ms (max). keep the time between gpi transitions to a minimum 0.35ms. gpi_in the deserializer stores the gpi input state. gpo is low after power-up. the c can set gpo by writing to the set_gpo register bit. fast detection of loss-of-lock a measure of link quality is the recovery time from loss-of- synchronization. the host can be quickly notified of loss- of-lock by connecting the deserializers lock output to the gpi input. if other sources use the gpi input, such as a touch-screen controller, the c can implement a routine to distinguish between interrupts from loss-of-sync and normal interrupts. reverse control-channel communica - tion does not require an active forward link to operate and accurately tracks the lock status of the gmsl link. lock asserts for video link only and not for the configura - tion link. providing a frame sync (camera applications) the gpi and gpo provide a simple solution for camera applications that require a frame-sync signal from the ecu (e.g., surround-view systems). connect the ecu frame-sync signal to the gpi input and connect the gpo output to the camera frame-sync input. gpi/gpo have a typical delay of 275s. skew between multiple gpi/ gpo channels is 115s (max). if a lower skew signal is required in legacy mode, connect the cameras frame-sync input to one of the serializers gpios and use an i 2 c broadcast- write command to change the gpio output state. this has a maximum skew of 1.5s, independent from the used i 2 c bit rate. entering/exiting sleep mode the procedure for entering and exiting sleep mode depends on the location of the microcontroller, and the type of control-channel interface used. if wake up from a remote (deserializer) side microcontroller is not needed or desired, set the dis_rwake bit = 1 to shut down remote wake-up for further power savings. to enter sleep mode, set sleep = 1. the device sleeps after 8ms. to wake up the device, send an arbitrary control-channel command to the serializer (the serializer does not send an acknowledge), wait for 5ms for the chip to power up and then set sleep = 0 to make the wake- up permanent. to wake up the device, send an arbitrary control-channel command to the serializer (the serializer does not send an acknowledge). wait for 5ms for the chip to power up and then set sleep = 0 to make the wake-up permanent. the deserializer wakes up and clears its sleep bit when serialization is enabled and it locks to the serializer. vendor connector cable type rosenberger 59s2ax-400a5-y dacar 302 coax rosenberger d4s10a-40ml5-z dacar 538 stp nissei gt11l-2s f-2wme awg28 stp jae mx38-ff a-bw-lxxxxx stp table 9. suggested connectors and cables for gmsl maxim integrated 64 www.maximintegrated.com max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive
+denotes a lead(pb)-free/rohs-compliant package. /v denotes an automotive qualified product. *ep = exposed pad. t = tape and reel. part number temp range pin-package MAX96709GTG+ -40c to +115c 24 tqfn-ep* MAX96709GTG/v+ -40c to +115c 24 tqfn-ep* MAX96709GTG/v+t -40c to +115c 24 tqfn-ep* MAX96709GTG+t -40c to +115c 24 tqfn-ep* sda scl out + dout [ 11 : 0 ] pclkout in + in - gpi max 96708 rx / sda tx / scl camera application lock max 96709 din [ 11 : 0 ] pclkin note : not all pullup / pulldown resistors are shown . see pin description for details . sda scl gpu ecu din [ 11 : 0 ] pclk din 12 / hs pclk din [ 11 : 0 ] camera hs i 2 c din 13 / vs vs sda scl fsync lock out - 49 . 9 49 . 9 k 49 . 9 45 . 3 k 4 . 99 k lmn 0 errb err dout 12 / hs hs dout 13 / vs vs lfltb lflt i 2 csel = 1 , cx / tp = 1 typical application circuits ordering information maxim integrated 65 max96709 14-bit gmsl serializer with high-immunity mode and coax/stp cable drive www.maximintegrated.com
revision history revision number revision date description pages changed 0 2/16 initial release ? 2016 maxim integrated products, inc. 66 maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and specifcations without notice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. max96709 14-bit gmsl serializer with high mode and coax/stp cable drive for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com.

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