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ADNS-3530 low power led integrated slim mouse sensor data sheet description the ADNS-3530 led optical mouse sensor is a small form factor (sff) led illuminated navigation system. the ADNS-3530 is a low-power optical navigation sen- sor. it has a new, low-power architecture and automatic power management modes, making it ideal for battery- and power-sensitive applications such as cordless input devices. the ADNS-3530 is capable of high-speed motion detection up to 20 ips and 8 g. in addition, it has an on-chip oscillator and integrated led to minimize external components. the ADNS-3530, along with the adns-3150-001 lens, forms a complete and compact mouse tracking system. there are no moving parts which means high reliabil- ity and less maintenance for the end user. in addition, precision optical alignment is not required, facilitating high volume assembly. the sensor is programmed via registers through a four- wire serial port. it is packaged in a 16 i/o surface mount- able package. theory of operation the ADNS-3530 is based on optical navigation technol- ogy, which measures changes in position by optically acquiring sequential surface images (frames) and math- ematically determining the direction and magnitude of movement. the ADNS-3530 contains an image acquisition system (ias), a digital signal processor (dsp), and a four wire serial port. the ias acquires microscopic surface images via the lens and illumination system. these images are processed by the dsp to determine the direction and distance of motion. the dsp calculates the x and y relative displacement values. an external microcontroller reads the x and y infor- mation from the sensor serial port. the microcontroller then translates the data into ps2, usb, or rf signals 0before sending them to the host pc or game console. features ? low power architecture ? small form factor ? surface mount technology (smt) device ? self-adjusting power-saving modes for longest battery life ? high speed motion detection up to 20 ips and 8 g ? self-adjusting frame rate for optimum performance ? motion detect pin output ? internal oscillator C no clock input needed ? selectable 500 and 1000 cpi resolution ? wide operating voltage: 2.7 v - 3.6 v nominal ? four wire serial port ? minimal number of passive components ? integrated chip-on-board led applications ? optical mice ? optical trackballs ? integrated input devices ? battery-powered input device all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. 1 pixart imaging inc. e-mail: fae_service@pixart.com.tw
2 pinout of ADNS-3530 optical mouse sensor pin name description 1 miso serial data output (master in/slave out) 2 sclk serial clock input 3 mosi serial data input (master out/slave in) 4 motion motion detect (active low output) 5 xy_led led control 6 led_gnd ground for led current 7 shtdwn shutdown (active high input) 8 led (+) led positive terminal 9 led (-) led negative terminal 10 avdd analog supply voltage 11 gnd ground 12 gnd ground 13 agnd analog ground 14 vdd supply voltage 15 gnd ground 16 ncs chip select (active low input) figure 1. package outline drawing (top view) product number date code lot code item marking remarks product number a3530 date code xyywwz x = subcon code yyww = date code z = sensor die source lot code vvv numeric pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pi xart imaging inc. e-mail: fae_service@pixart.com.tw
3 figure 2. package outline drawing caution: it is advised that normal static precautions be taken in handling and assembly of this component to prevent damage and/or degradation which may be induced by esd. pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
4 overview of optical mouse sensor assembly pixart imaging provides an iges fi le drawing de- scribing the base plate molding features for lens and pcb alignment. the components interlock as they are mounted onto defi ned features on the base plate. the ADNS-3530 sensor is designed for surface mounting on a pcb, looking down. there is an aperture stop and features on the package that align to the lens. the adns-3150-001 lens provides optics for the imag- ing of the surface as well as illumination of the surface at the optimum angle. features on the lens align it to the sensor and base plate. figure 3. recommended customers pcb padout and spacing figure 4. 2d assembly drawing of ADNS-3530 optical center pad #1 0 0 0.45 (0.18) 0.53 (0.21) 1.60 (0.063) 0.53 (0.21) 5.89 (0.232) 0.45 (0.18) 4.20 (0.165) 8.40 (0.331) (x 14) customer pcb ADNS-3530 mouse bottom cover adns-3150-001 pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
5 figure 5a. exploded top view figure 5b. exploded bottom view ADNS-3530 adns-3150-001 customer- supplied base plate ADNS-3530 adns-3150-001 customer- supplied base plate pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
6 pcb assembly considerations 1. surface mount the sensor and all other electrical com- ponents into pcb. 2. refl ow the entire assembly in a no-wash solder process. 3. place the lens onto the base plate. care must be taken to avoid contaminating or staining the lens. 4. remove the protective kapton tape from optical ap- erture of the sensor and led. care must be taken to keep contaminants from entering the aperture. rec- ommend not to place the pcb facing up during the entire mouse assembly process. recommend to hold the pcb fi rst vertically for the kapton removal process. 5. insert pcb assembly over the lens onto the base plate aligning post to retain pcb assembly. the lens piece has alignment posts which will mate with the align- ment holes on the sensor aperture. 6. the optical position reference for the pcb is set by the base plate and lens. note that the pcb motion due to button presses must be minimized to maintain optical alignment. typical distance millimeters creepage 0.6 clearance 2.76 note that the lens material is polycarbonate and there- fore, cyanoacrylate-based adhesives or other adhesives that may damage the lens should not be used. 7. install mouse top case. there must be a feature in the top case to press down onto the sensor to ensure the sensor and lens components are interlocked to the correct vertical height. design considerations for improved esd performance for improved electrostatic discharge performance, typi- cal creepage and clearance distance are shown in the table below. assumption: base plate construction as per the pixart imaging supplied iges fi le and adns- 3150-001 lens. figure 6a. sectional view of pcb assembly figure 6b. sectional view of pcb assembly highlighting optical mouse components lens die to navigation surface navigation surface bottom mating surface of lens to navigation surface bottom of lens to navigation surface bottom of pcb to navigation surface bottom of pcb to bottom mating surface of lens customer's pcb 3.25 (0.13) 2.28 (0.09) 0.29 (0.01) 0.97 (0.04) 2.50 (0.10) sensor customer's base plate navigation surface customer's pcb customer's base plate sensor die sensor pcb lens led die pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
7 figure 7. schematic diagram for interface between ADNS-3530 and microcontroller note: the supply and ground paths should be laid out using a star topology.
8 regulatory requirements ? passes fcc b and worldwide analogous emission limits when assembled into a mouse with shielded cable and following pixart imaging recommendations. ? passes iec-1000-4-3 radiated susceptibility level when assembled into a mouse with shielded cable and fol- lowing pixart imaging recommendations. ? passes en61000-4-4/iec801-4 eft tests when assem- bled into a mouse with shielded cable and following pixart imaging recommendations. ? ul fl ammability level ul94 v-0. absolute maximum ratings parameter symbol minimum maximum units notes storage temperature t s -40 85 c lead solder temperature 260 c for 10 seconds, 1.6 mm below seat- ing plane supply voltage v dd -0.5 3.7 v esd (sensor only) 2 kv all pins, human body model mil 883 method 3015 input voltage v in -0.5 v dd + 0.5 v all pins latchup current iout 20 ma all pins recommended operating conditions parameter symbol minimum typical maximum units notes operating temperature t a 04 0 c power supply voltage v dd 2.7 3.6 volts including noise power supply rise time v rt 0.001 100 ms 0 to 2.8 v supply noise (sinusoidal) v na 100 mvp-p 10 khz - 50 mhz serial port clock frequency f sclk 1 mhz active drive, 50% duty cycle distance from lens reference plane to surface z -0.1 0.97 +0.1 mm result in 0.1 mm dof speed s 20 in/sec acceleration a 8 g figure 8. distance from lens reference plane to surface lens navigation surface customer's pcb 0.97 (0.04) sensor pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
9 ac electrical specifi cations electrical characteristics over recommended operating conditions. typical values at 25c, v dd3 = 2.85 v. parameter symbol min. typical max. units notes motion delay after reset t mot-rst 23 ms from power_up_reset register write to valid motion, assuming motion is present shutdown t shtdwn 50 ms from shtdwn pin active to low current wake from shutdown t wakeup 1 s from shtdwn pin inactive to valid mo- tion. notes: a reset must be asserted after a shutdown. refer to section notes on shutdown and forced rest, also note t mot-rst forced rest enable t rest-en 1 s from resten bits set to low current wake from forced rest t rest-dis 1 s from resten bits cleared to valid motion miso rise time t r-miso 150 300 ns c l = 100 pf miso fall time t f-miso 150 300 ns c l = 100 pf miso delay after sclk t dly-miso 120 ns from sclk falling edge to miso data valid, no load conditions miso hold time t hold-miso 0.5 1/f sclk s data held until next falling sclk edge mosi hold time t hold-mosi 200 ns amount of time data is valid after sclk rising edge mosi setup time t setup-mosi 120 ns from data valid to sclk rising edge spi time between write com- mands t sww 30 s from rising sclk for last bit of the fi rst data byte, to rising sclk for last bit of the second data byte spi time between write and read commands t swr 20 s from rising sclk for last bit of the fi rst data byte, to rising sclk for last bit of the second address byte spi time between read and subsequent commands t srw t srr 500 ns from rising sclk for last bit of the fi rst data byte, to falling sclk for the fi rst bit of the address byte of the next command spi read address-data delay t srad 4 s from rising sclk for last bit of the address byte, to falling sclk for fi rst bit of data being read ncs inactive after motion burst t bexit 500 ns minimum ncs inactive time after motion burst before next spi usage ncs to sclk active t ncs-sclk 120 ns from ncs falling edge to fi rst sclk rising edge sclk to ncs inactive (for read operation) t sclk-ncs 120 ns from last sclk rising edge to ncs rising edge, for valid miso data transfer sclk to ncs inactive (for write operation) t sclk-ncs 20 us from last sclk rising edge to ncs rising edge, for valid mosi data transfer ncs to miso high-z t ncs-miso 500 ns from ncs rising edge to miso high-z state motion rise time t r-motion 150 300 ns c l = 100 pf motion fall time t f-motion 150 300 ns c l = 100 pf shtdwn pulse width t p-shtdwn 1s transient supply current i ddt 45 ma max supply current during a v dd ramp from 0 to 2.8 v pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
10 700 600 500 400 300 200 100 0 z-height (mm) ADNS-3530 resolution resolution (cpi) white paper manila white formica black copy white pine 0.77 0.87 0.97 1.07 1.17 1.27 1.37 1.47 1.57 1.67 1.77 1.87 1.97 dc electrical specifi cations electrical characteristics over recommended operating conditions. typical values at 25c, v dd =2.85 v. parameter symbol min. typical max. units notes dc supply current in various modes i dd_run i dd_rest1 i dd_rest2 i dd_rest3 3.6 0.6 0.15 0.04 10 1.8 0.40 0.15 ma average current, including led current. no load on miso, motion. peak supply current 40 ma peak current in 100 khz bandwidth, including led current. shutdown supply cur- rent i ddshtdwn 1 12 a sclk, mosi and ncs must be within 300 mv of gnd or v dd . shtdwn must be within 300 mv of v dd . input low voltage v il 0.5 v sclk, mosi, ncs, shtdwn input high voltage v ih v dd C 0.6 v sclk, mosi, ncs, shtdwn input hysteresis vi _hys 100 mv sclk, mosi, ncs, shtdwn input leakage current i leak 1 10 a vin = v dd - 0.6 v, sclk, mosi, ncs, sht- dwn output low voltage v ol 0.7 v i out = 1 ma, miso, motion output high voltage v oh v dd C 0.7 v i out = -1 ma, miso, motion input capacitance c in 10 pf mosi, ncs, sclk, shtdwn figure 10. typical path deviation vs. z distance (mm) relationship of mouse count to distance = m (mouse count)/n (cpi). e.g.: deviation of 7 mouse count = 7/1000 = 0.007 inch, wher e m = 7, n = 1000. figure 9. mean resolution vs. z typical path deviation largest single perpendicular deviation from a straight line at 45 degrees path length = 4 inches; speed = 6 ips; resolution = 1000 cpi white paper manila white formica white pine black copy 90 70 50 30 10 -10 0.77 0.87 0.97 1.07 1.17 1.27 1.37 1.47 1.671.57 1.77 1.87 1.97 distance from lens reference plane to navigation surface (mm) maximum distance (mouse count) pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
11 power management modes the ADNS-3530 has three power-saving modes. each mode has a diff erent motion detection period, aff ecting response time to mouse motion (response time). the sensor automatically changes to the appropriate mode, depending on the time since the last reported motion (downshift time). the parameters of each mode are shown in the following table. mode response time (nominal) downshift time (nominal) rest 1 16.5 ms 237 ms rest 2 82 ms 8.4 s rest 3 410 ms 504 s motion pin timing the motion pin is a level-sensitive output that signals the microcontroller when motion has occurred. the mo- tion pin is lowered whenever the motion bit is set; in other words, whenever there is data in the delta_x or delta_y registers. clearing the motion bit (by reading delta_y and delta_x, or writing to the motion register) will put the motion pin high. led mode for power savings, the led will not be continuously on. ADNS-3530 will fl ash the led only when needed. synchronous serial port the synchronous serial port is used to set and read pa- rameters in the ADNS-3530, and to read out the motion information. the port is a four wire serial port. the host microcon- troller always initiates communication; the ADNS-3530 never initiates data transfers. sclk, mosi, and ncs may be driven directly by a microcontroller. the port pins may be shared with other spi slave devices. when the ncs pin is high, the inputs are ignored and the output is tri-stated. the lines that comprise the spi port: sclk: clock input. it is always generated by the mas- ter (the microcontroller). mosi: input data. (master out/slave in) miso: output data. (master in/slave out) ncs: chip select input (active low). ncs needs to be low to activate the serial port; otherwise, miso will be high z, and mosi & sclk will be ignored. ncs can also be used to reset the se- rial port in case of an error. chip select operation the serial port is activated after ncs goes low. if ncs is raised during a transaction, the entire transaction is aborted and the serial port will be reset. this is true for all transactions. after a transaction is aborted, the nor- mal address-to-data or transaction-to-transaction delay is still required before beginning the next transaction. to improve communication reliability, all serial transac- tions should be framed by ncs. in other words, the port should not remain enabled during periods of non-use because esd and eft/b events could be interpreted as serial communication and put the chip into an unknown state. in addition, ncs must be raised after each burst- mode transaction is complete to terminate burst-mode. the port is not available for further use until burst-mode is terminated. write operation write operation, defi ned as data going from the micro- controller to the ADNS-3530, is always initiated by the microcontroller and consists of two bytes. the fi rst byte contains the address (seven bits) and has a 1 as its msb to indicate data direction. the second byte contains the data. the ADNS-3530 reads mosi on rising edges of sclk. pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
12 figure 11. write operation figure 12. mosi setup and hold time read operation a read operation, defi ned as data going from the adns- 3530 to the microcontroller, is always initiated by the microcontroller and consists of two bytes. the fi rst byte contains the address, is sent by the microcontroller over mosi, and has a 0 as its msb to indicate data direction. the second byte contains the data and is driven by the ADNS-3530 over miso. the sensor outputs miso bits on falling edges of sclk and samples mosi bits on every rising edge of sclk. figure 13. read operation figure 14. miso delay and hold time 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 21 d 0 d 5 d 6 d 7 a 0 a 1 a 2 a 3 a 4 a 5 a 6 1a 6 d 4 d 3 d 2 d 1 sclk ncs mosi mosi driven by micro-controller miso t setup, mosi t hold, mosi sclk mosi 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 a 0 a 1 a 2 a 3 a 4 a 5 a 6 sclk ncs sclk cycle # mosi d 0 d 5 d 6 d 7 t srad delay d 4 d 3 d 2 d 1 miso d 0 t hold-miso t dly-miso sclk miso pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
13 note: the 0.5/f sclk minimum high state of sclk is also the minimum miso data hold time of the ADNS-3530. since the falling edge of sclk is actually the start of the next read or write command, the ADNS-3530 will hold the state of data on miso until the falling edge of sclk. required timing between read and write commands there are minimum timing requirements between read and write commands on the serial port. figure 15. timing between two write commands if the rising edge of the sclk for the last data bit of the second write command occurs before the required delay (t sww ), then the fi rst write command may not complete correctly. figure 16. timing between write and read commands if the rising edge of sclk for the last address bit of the read command occurs before the required delay (t swr ), the write command may not complete correctly. figure 17. timing between read and either write or subsequent read commands sclk t sww write operation address data write operation address data sclk t swr write operation address data next read operation address ttt ttt sclk t srad read operation address next read or write operation address ttt ttt t srw & t srr data pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
14 during a read operation sclk should be delayed at least t srad after the last address data bit to ensure that the ADNS-3530 has time to prepare the requested data. the falling edge of sclk for the fi rst address bit of either the read or write command must be at least t srr or t srw af- ter the last sclk rising edge of the last data bit of the previous read operation. burst mode operation burst mode is a special serial port operation mode that may be used to reduce the serial transaction time for a motion read. the speed improvement is achieved by continuous data clocking from multiple registers with- out the need to specify the register address, and by not requiring the normal delay period between data bytes. burst mode is activated by reading the motion_burst register. the ADNS-3530 will respond with the contents of the motion, delta_y, delta_x, squal, shutter_upper, shutter_lower and maximum_pixel registers in that or- der. the burst transaction can be terminated after the fi rst three bytes of the sequence are read by bringing the ncs pin high. after sending the register address, the microcontroller must wait t srad and then begin reading data. all data bits can be read with no delay between bytes by driving sclk at the normal rate. the data is latched into the output buff er after the last address bit is received. after the burst transmission is complete, the microcontroller must raise the ncs line for at least t bexit to terminate burst mode. the serial port is not available for use until it is reset with ncs, even for a second burst transmission. figure 18. motion burst timing notes on power-up the ADNS-3530 does not perform an internal power up self-reset; the power_up_reset register must be writ- ten every time power is applied. the appropriate se- quence is as follows: 1. apply power 2. drive ncs high, then low to reset the spi port 3. write 0x5a to register 0x3a 4. read from registers 0x02, 0x03 and 0x04 (or read these same three bytes from burst motion register 0x42) one time regardless the state of the motion pin. during power-up there will be a period of time after the power supply is high but before any clocks are available. the table below shows the state of the various pins dur- ing power-up and reset. state of signal pins after v dd is valid pin on power-up ncs high before reset ncs low before reset after reset ncs functional high low functional miso undefi ned undefi ned functional depends on ncs sclk ignored ignored functional depends on ncs mosi ignored ignored functional depends on ncs xy_led undefi ned undefi ned undefi ned functional motion undefi ned undefi ned undefi ned functional shtdwn must be low must be low must be low functional motion_burst register address read first byte first read operation read second byte read third byte sclk ttt ttt t srad pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
15 notes on shutdown and forced rest the ADNS-3530 can be set in rest mode through the confi guration_bits register (0x11). this is to allow for further power savings in applications where the sensor does not need to operate all the time. the ADNS-3530 can be set in shutdown mode by as- serting the shtdwn pin. for proper operation, shtd- wn pulse width must be at least t shtdwn . shorter pulse widths may cause the chip to enter an undefi ned state. in addition, the spi port should not be accessed when shtdwn is asserted. (other ics on the same spi bus can be accessed, as long as the sensors ncs pin is not as- serted.) the table below shows the state of various pins during shutdown. after deasserting shtdwn, a full reset must be initiated. wait t wakeup before accessing the spi port, then write 0x5a to the power_up_reset register. any register settings must then be reloaded. pin shtdwn active ncs functional* miso undefi ned sclk undefi ned mosi undefi ned xy_led low current motion undefi ned *ncs pin must be held to 1 (high) if spi bus is shared with other de- vices. it can be in either state if the sensor is the only device in addition to the microcontroller. note: there are long wakeup times from shutdown and forced rest. these features should not be used for power management during normal mouse motion. pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
16 registers the ADNS-3530 registers are accessible via the serial port. the registers are used to read motion data and status as well as to set the device confi guration. address register read/write default value 0x00 product_id r 0x0d 0x01 revision_id r 0x02 0x02 motion r/w 0x00 0x03 delta_y r any 0x04 delta_x r any 0x05 squal r any 0x06 shutter_upper r any 0x07 shutter_lower r any 0x08 maximum_pixel r any 0x09 pixel_sum r any 0x0a minimum_pixel r any 0x0b pixel_grab r/w any 0x0c crc0 r any 0x0d crc1 r any 0x0e crc2 r any 0x0f crc3 r any 0x10 self_test w 0x11 confi guration_bits r/w 0x03 0x12-0x2d reserved 0x2e observation r/w any 0x2f-0x38 reserved 0x3a power_up_reset w 0x3b-0x3d reserved 0x3e inverse_revision_id r 0xfd 0x3f inverse_product_id r 0xf2 0x42 motion_burst r any product_id address: 0x00 access: read reset value: 0x0d bit 7 6 5 4 3 2 1 0 field pid 7 pid 6 pid 5 pid 4 pid 3 pid 2 pid 1 pid 0 data type: 8-bit unsigned integer usage: this register contains a unique identifi cation assigned to the ADNS-3530. the value in this register does not change; it can be used to verify that the serial communications link is functional. pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
17 revision_id address: 0x01 access: read reset value: 0x02 bit76543210 field rid 7 rid 6 rid 5 rid 4 rid 3 rid 2 rid 1 rid 0 data type: 8-bit unsigned integer usage: this register contains the ic revision. it is subject to change when new ic versions are released. motion address: 0x02 access: read/write reset value: 0x00 bit 76 5 4 3 2 1 0 field mot pixrdy pixfirst ovf reserved reserved reserved reserved data type: bit fi eld usage: register 0x02 allows the user to determine if motion has occurred since the last time it was read. if the mot bit is set, then the user should read registers 0x03 and 0x04 to get the accumulated motion. read this register before reading the delta_y and delta_x registers. writing anything to this register clears the mot and ovf bits, delta_y and delta_x registers. the written data byte is not saved. internal buff ers can accumulate more than eight bits of motion for x or y. if either one of the internal buff ers overfl ows, then absolute path data is lost and the ovf bit is set. this bit is cleared once some motion has been read from the delta_x and delta_y registers, and if the buff ers are not at full scale. since more data is present in the buff ers, the cycle of reading the motion, delta_x and delta_y regis- ters should be repeated until the motion bit (mot) is cleared. until mot is cleared, either the delta_x or delta_y registers will read either positive or negative full scale. if the motion register has not been read for long time, at 500 cpi it may take up to 16 read cycles to clear the buff ers, at 1000 cpi, up to 32 cycles. to clear an overfl ow, write anything to this register. the pixrdy bit will be set whenever a valid pixel data byte is available in the pixel_dump register. check that this bit is set before reading from pixel_dump. to ensure that the pixel_grab pointer has been reset to pixel 0,0 on the initial write to pixel_grab, check to see if pixfirst is set to high. field name description mot motion since last report 0 = no motion 1 = motion occurred, data ready for reading in delta_x and delta_y registers pixrdy pixel dump data byte is available in pixel_dump register 0 = data not available 1 = data available pixfirst this bit is set when the pixel_grab register is written to or when the complete pixel array has been read, initiating an increment to pixel 0,0. 0 = pixel_grab data not from pixel 0,0 1 = pixel_grab data is from pixel 0,0 ovf motion overfl ow, _y and/or _x buff er has overfl owed since last report 0 = no overfl ow 1 = overfl ow has occurred pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
18 delta_y address: 0x03 access: read reset value: undefi ned bit 7 6 5 4 3 2 1 0 field x 7 x 6 x 5 x 4 x 3 x 2 x 1 x 0 data type: eight bit 2s complement number usage: y movement is counts since last report. absolute value is determined by resolution. reading clears the register. note: pixart imaging recommends that registers 0x03 and 0x04 be read sequentially. delta_x address: 0x04 access: read reset value: undefi ned bit 7 6 5 4 3 2 1 0 field y 7 y 6 y 5 y 4 y 3 y 2 y 1 y 0 data type: eight bit 2s complement number usage: x movement is counts since last report. absolute value is determined by resolution. reading clears the register. note: pixart imaging recommends that registers 0x03 and 0x04 be read sequentially. 80 81 fe ff 00 01 02 7e 7f -128 -127 -2 -1 0 +1 +2 +126 +127 motion delta_y 80 81 fe ff 00 01 02 7e 7f -128 -127 -2 -1 0 +1 +2 +126 +127 motion delta_x pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
19 shutter_upper address: 0x06 access: read reset value: undefi ned bit 76 543210 field s 15 s 14 s 13 s 12 s 11 s 10 s 9 s 8 shutter_lower address: 0x07 access: read reset value: undefi ned bit 76 543210 field s 7 s 6 s 5 s 4 s 3 s 2 s 1 s 0 data type: sixteen bit unsigned integer usage: units are clock cycles. read shutter_upper fi rst, then shutter_lower. they should be read consecu- tively. the shutter is adjusted to keep the average and maximum pixel values within normal operating ranges. the shutter value is automatically adjusted. maximum_pixel address: 0x08 access: read reset value: undefi ned bit 7 6 5 4 3 2 1 0 field mp 7 mp 6 mp 5 mp 4 mp 3 mp 2 mp 1 mp 0 data type: eight-bit number usage: maximum pixel value in current frame. minimum value = 0, maximum value = 254. the maximum pixel value can vary with every frame. squal address: 0x05 access: read reset value: undefi ned bit 7 6 5 4 3 2 1 0 field sq 7 sq 6 sq 5 sq 4 sq 3 sq 2 sq 1 sq 0 data type: upper 8 bits of a 9-bit unsigned integer usage: squal (surface quality) is a measure of the number of valid features visible by the sensor in the current frame. the maximum squal register value is 167. since small changes in the current frame can result in changes in squal, variations in squal when looking at a surface are expected. pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
20 pixel_sum address: 0x09 access: read reset value: undefi ned bit 7 6 5 4 3 2 1 0 field ap 7 ap 6 ap 5 ap 4 ap 3 ap 2 ap 1 ap 0 data type: high 8 bits of an unsigned 17-bit integer usage: this register is used to fi nd the average pixel value. it reports the seven bits of a 16-bit counter, which sums all pixels in the current frame. it may be described as the full sum divided by 512. to fi nd the average pixel value, use the following formula: average pixel = register value * 128/121 = register value * 1.06 the maximum register value is 240. the minimum is 0. the pixel sum value can change on every frame. minimum_pixel address: 0x0a access: read reset value: undefi ned bit 7 6 5 4 3 2 1 0 field mp 7 mp 6 mp 5 mp 4 mp 3 mp 2 mp 1 mp 0 data type: eight-bit number usage: minimum pixel value in current frame. minimum value = 0, maximum value = 254. the minimum pixel value can vary with every frame. pixel_grab address: 0x0b access: read/write reset value: undefi ned bit 7 6 5 4 3 2 1 0 field pd 7 pd 6 pd 5 pd 4 pd 3 pd 2 pd 1 pd 0 data type: eight-bit word usage: for test purposes, the sensor will read out the contents of the pixel array, one pixel per frame. to start a pixel grab, write anything to this register to reset the pointer to pixel 0,0. then read the pixrdy bit in the motion register. when the pixrdy bit is set, there is valid data in this register to read out. after the data in this register is read, the pointer will automatically increment to the next pixel. reading may continue indefi nitely; once a complete frames worth of pixels has been read, pixfirst will be set to high to indicate the start of the fi rst pixel and the address pointer will start at the beginning location again. pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
21 figure 19. surface image pixel address map crc0 address: 0x0c access: read reset value: undefi ned bit 7 6 5 4 3 2 1 0 field crc0 7 crc0 6 crc0 5 crc0 4 crc0 3 crc0 2 crc0 1 crc0 0 data type: eight-bit number usage: register 0x0c reports the fi rst byte of the system self test results. value = 0xaf. see self test register 0x10. crc1 address: 0x0d access: read reset value: undefi ned bit 7 6 5 4 3 2 1 0 field crc1 7 crc1 6 crc1 5 crc1 4 crc1 3 crc1 2 crc1 1 crc1 0 data type: eight bit number usage: register 0x0c reports the second byte of the system self test results. value = 0x4e. see self test register 0x10. (pixel array map looking through the adns-3150-001 lens) 462 461 439 417 395 373 351 329 307 285 263 241 219 197 175 153 131 109 87 65 43 21 463 460 438 416 394 372 350 328 306 284 262 240 218 196 174 152 130 108 86 64 42 20 464 459 437 415 393 371 349 327 305 283 261 239 217 195 173 151 129 107 85 63 41 19 465 458 436 414 392 370 348 326 304 282 260 238 216 194 172 150 128 106 84 62 40 18 466 457 435 413 391 369 347 325 303 281 259 237 215 193 171 149 127 105 83 61 39 17 467 456 434 412 390 368 346 324 302 280 258 236 214 192 170 148 126 104 82 60 38 16 468455433 411389 367345 323 3012 79 257 235 213 191 169 147 125 103 81 59 37 15 469 454 432 410 388 366 344 322 300 278 256 234 212 190 168 146 124 102 80 58 36 14 470 453 431 409 387 365 343 321 299 277 255 233 211 189 167 145 123 101 79 57 35 13 471 452 430 408 386 364 342 320 298 276 254 232 210 188 166 144 122 100 78 56 34 12 472 451 429 407 385 363 341 319 297 275 253 231 209 187 165 143 121 99 77 55 33 11 473 450 428 406 384 362 340 318 296 274 252 230 208 186 164 142 120 98 76 54 32 10 474 449 427 405 383 361 339 317 295 273 251 229 207 185 163 141 119 97 75 53 3 19 475 448 426 404 382 360 338 316 294 272 250 228 206 184 162 140 118 96 74 52 30 8 476 447 425 403 381 359 337 315 293 271 249 227 205 183 161 139 117 95 73 51 29 7 477 446 424 402 380 358 336 314 292 270 248 226 204 182 160 138 116 94 72 50 28 6 478 445 423 401 379 357 335 313 291 269 247 225 203 181 159 137 115 93 71 49 27 5 479 444 422 400 378 356 334 312 290 268 246 224 202 180 158 136 114 92 70 48 26 4 480 443 421 399 377 355 333 311 289 267 245 223 201 179 157 135 113 91 69 47 25 3 481 442 420 398 376 354 332 310 288 266 244 222 200 178 156 134 112 90 68 46 24 2 482 441 419 397 375 353 331 309 287 265 243 221 199 177 155 133 111 89 67 45 23 1 483 440 418 396 374 352 330 308 286 264 242 220 198 176 154 132 110 88 66 44 22 0 bottom view of mouse hole at mouse bottom cover for lens top view of mouse lb rb positive x positive y pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
22 crc2 address: 0x0e access: read reset value: undefi ned bit 7 6 5 4 3 2 1 0 field crc2 7 crc2 6 crc2 5 crc2 4 crc2 3 crc2 2 crc2 1 crc2 0 data type: eight-bit number usage: register 0x0e reports the third byte of the system self test results. value = 0x31. see self test register 0x10. crc3 address: 0x0f access: read reset value: undefi ned bit 7 6 5 4 3 2 1 0 field crc3 7 crc3 6 crc3 5 crc3 4 crc3 3 crc3 2 crc3 1 crc3 0 data type: eight-bit number usage: register 0x0f reports the fourth byte of the system self test results. value = 0x22. see self test register 0x10. self_test address: 0x10 access: write reset value: na bit76543210 field reserved reserved reserved reserved reserved reserved reserved testen data type: bit fi eld usage: set the testen bit in register 0x10 to start the system self-test. the test takes 250 ms. during this time, do not write or read through the spi port. results are available in the crc0-3 registers. after self-test, reset the chip to start normal operation. field name description testen enable system self test 0 = disabled 1 = enable pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
23 confi guration_bits address: 0x11 access: read/write reset value: 0x03 bit765 4 3210 field res reserved resten 1 resten 0 reserved reserved reserved reserved data type: bit fi eld usage: register 0x11 allows the user to change the confi guration of the sensor. setting the resten bit forces the sensor into rest mode, as described in the power modes section above. the res bit allows selec- tion between 500 and 1000 cpi resolution. note: forced rest has a long wakeup time and should not be used for power management during normal mouse motion. field name description resten 1-0 puts chip into rest mode 00 = normal operation 01 = force rest1 10 = force rest2 11 = force rest3 res sets resolution 0 = 500 1 = 1000 reserved address: 0x12-0x2d pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
24 observation address: 0x2e access: read/write reset value: undefi ned bit76543210 field mode 1 mode 0 reserved reserved obs 3 obs 2 obs 1 obs 0 data type: bit fi eld usage: register 0x2e provides bits that are set every frame. it can be used during eftb testing to check that the chip is running correctly. writing anything to this register will clear the bits. field name description mode 1-0 mode status: reports which mode the sensor is in. 00 = run 01 = rest1 10 = rest2 11 = rest3 obs 3-0 set every frame reserved address: 0x2f-0x39 power_up_reset address: 0x3a access: write reset value: undefi ned bit76543210 field rst 7 rst 6 rst 5 rst 4 rst 3 rst 2 rst 1 rst 0 data type: 8-bit integer usage: write 0x5a to this register to reset the chip. all settings will revert to default values. pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw
inverse_revision_id address: 0x3e access: read reset value: 0xfd bit76543210 field nrid 7 nrid 6 nrid 5 nrid 4 nrid 3 nrid 2 nrid 1 nrid 0 data type: nverse 8-bit unsigned integer usage: this value is the inverse of the revision_id. it can be used to test the spi port. inverse_revision_id address: 0x3f access: read reset value: 0xf2 bit76543210 field npid 7 npid 6 npid 5 npid 4 npid 3 npid 2 npid 1 npid 0 data type: inverse 8-bit unsigned integer usage: this value is the inverse of the product_id. it can be used to test the spi port. motion_burst address: 0x42 access: read reset value: any bit76543210 field mb 7 mb 6 mb 5 mb 4 mb 3 mb 2 mb 1 mb 0 data type: various usage: read from this register to activate burst mode. the sensor will return the data in the motion register, delta_y, delta_x, squal, shutter_upper, shutter_lower, and maximum_pixel. a minimum of 3 bytes should be read during a burst read. reading the fi rst 3 bytes clears the motion data. pix a rt imaging inc. low power led integrated slim mouse sensor all rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. pixart imaging inc. e-mail: fae_service@pixart.com.tw

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