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504/505appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 1 the sp50x evaluation board is designed to analyze the sp504 or SP505 multi-protocol transceivers. the evaluation board provides access points to all of the driver and receiver i/o pins so that the user can measure electrical characteristics and waveforms of each signal. the sp50x evaluation board also includes a db-25 serial port connector which is configured to a eia-530 pinout. this allows easy connections to other dte or dce systems as well as network analyzers. the next section describes the sp50x evaluation board including configuration instructions for either the sp504 or SP505 . a schematic of the board and the pcb layout are also included. product pinouts, product protocol tables, and db-25 pinout assignment table are also included for convenience. description... n easy evaluation for the sp504 or SP505 multi-protocol transceiver n probe points accessable to driver and receiver i/o pins n db-25 serial port connector adheres to eia-530 pinout n interface mode select through on-board dip switches n driver inputs can be easily configured to a ttl dc or ac input n convenient layout of driver and receiver access pins n compact 6" x 4" size sp504/505 evaluation board manual ?
504/505 appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 2 board layout i/o pinouts the sp504/SP505 evaluation board has been designed to easily and conveniently provide access to all inputs and outputs to the device under test. position the board with the db-25 connector at the top and the dip switches at the bottom. from this orientation, all driver inputs and outputs are located on the right-hand side of the board while all receiver inputs and outputs are located on the left-hand side of the board. the access pins are arranged in groups of eight pins for each driver and seven pins for each receiver. starting at the "txc" driver located at the upper right-hand corner of the board, the first two rows of pins are tt(a). these are the txc driver output tt(a) connections. there are two probe pins to accomodate loads, multiple test clips, etc. below the tt(a) pins are two tt(b) pins. the last two pins below the tt(b) pins are ground pins. located in front of the tt(a), tt(b) and ground pins are two pins marked txc and ttl. the txc pin is the input to the txc driver while the ttl pin is connected to a common bus. this common ttl bus provides a convenient way to connect some or all driver inputs to a common ttl signal. the remaining six drivers are arranged similar to the txc driver. the receivers are laid out similar to the drivers, but on the opposite side of the board. starting at the upper left-hand corner of the evaluation board are two pins on the same row marked cs(a). these are the cts receiver input cs(a) connections. below the cs(a) pins are two cs(b) pins. below the cs(b) pins are two ground pins. in front of the six cs(a), cs(b) and ground pins is a single pin marked cts. this is the ttl output from the cts receiver. again, the remaining receivers are similarly laid out. dip switches at the bottom of the evaluation board are two dip switches. a switch placed in an "up" posi- tion configures a logic high while a "down" position configures a logic low. the right- hand dip switch is used to configure the driver and receiver mode select for the SP505 device or just the driver mode select for the sp504 device. these four mode select switches are marked tdec3-tdec0. the right-hand dip switch also controls the sct receiver enable line, scten, and the decoder latch control, latch, in the SP505 . please note that logic low is off (rocker down) as labeled on the dip switch, not high or low as labeled on the evaluation board. the left-hand dip switch is used to configure the sp504 receiver mode select pins rdec3- rdec0. but internally within the SP505 , the receiver and driver mode select lines are grouped together as common select lines dec3-dec0 which are identified on the evaluation board as tdec3-tdec0 on the right-hand dip switch. thus, on the left-hand dip switch for the SP505 device, the rdec3-rdec0 positions are instead used to control the individual driver tri-state controls,/rlen, /llen, /rsen, /tren & /sden. r13 on the left-center position of the evaluation board, immediately to the left of the sp504 or SP505 device, is a column of resistors. there are eleven resistors required for the sp504 device on the evaluation board. therefore, there should be one open position marked for resistor r13 only for SP505 . if the evaluation board is being used for the SP505 , then this position must be fitted with a 500 ohm 1% resistor. this r13 is the pull- down resistor for the /rlen control line which is a ttl input. the r13 is left open for the sp504 because pin 18 is a ttl output (v35_stat) on the sp504 .
504/505appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 3 fuse at the upper right-hand side of the board, just below the db-25 connector, is a location for a fuse. there must either be a fuse, a low value resistor (1 to 10 ohms) or a jumper wire installed at this location. a one amp fuse is recommended. v35_stat as mentioned previously, the sp504 device has a ttl output labled v35_stat. when the sp504 is configured to v.35 mode, this pin provides a high level ttl output. in all other modes, this pin provides a low level ttl output. the v35_stat output is used to control fet switches which switch 150 ohm v.35 termina- tion resistors in or out of the sp504 circuit configuration. this feature is labeled on the sp50x evaluation board but is not used. the rocker switch for v35_stat must be in the off position (rocker down) when using sp504 board. using the evaluation board on the bottom righ-hand side of the evaluation board are two pins identified as gnd and v cc . connect this gnd to the power supply ground. connect v cc to a +5 volt dc power supply. if possible, limit the supply current to 0.5-1.0 amp. do not switch power on when connecting power to the evaluation board. all drivers active with single ttl input sp504 on the right-hand side of the evaluation board, connect jumper wires between all seven driver inputs (txc, txd, dtr, rts, ll, rl, and st) to each of the corresponding ttl pin on the right hand side. next, configure the mode selection to the desired mode using tdec3-tdec0 on the right-hand dip switch and rdec3-rdec0 on the left-hand dip switch if the sp504 is used. connect a system clock or signal generator with a ttl-level output and a frequency within the acceptable range of the driver under test to any of the ttl pins. the common bus will route the signal to each driver with a jumper installed to the ttl bus. ensure that /sten and /tten enable switches on the left-hand dip switch have been set to low position (rocker down) to enable the drivers. once the power is on and the driver inputs receive a signal, the driver outputs can be analyzed with a oscilloscope or digital multi-meter. the mode selection can be performed at any time using the tdec and rdec positions on the dip switches. SP505 this is similar to the SP505 except that the rdec positions on the left dip switch are now low-active enable lines for the st, dtr, rts, and ll drivers. the v35_stat is now the low- active rl driver enable pin. driver/receiver loopback sp504 this example uses the st driver looped back into the sct receiver. first, configure the mode select for the desired mode using rdec3-rdec0 on the left-hand dip switch and tdec3-tdec0 on the right-hand dip switch. connect a jumper wire between an st(a) pin and an sct(a) pin. if your mode select is for a differential driver/ receiver, then also connect a jumper wire be- tween an st(b) pin and an sct(b) pin. next, connect a signal generator to the st pin. the signal generator output must be a ttl-level output at a frequency within the acceptable range of the driver mode under test. set /sten to logic low (rocker down) and scten to logic high (rocker up). the driver outputs are connected back to the receiver inputs so that driver input to receiver output delays can be examined. this configuration is similar for the other drivers. SP505 the same approach for the sp504 above can be applied for the SP505 . however, the SP505 can be programmed internally for loopback. dec 0 to dec 3 should be configured as "1010", respec- tively for a single ended loopback. dec 0 to dec 3 should be configured as "1011", respec- tively for a differential loopback.
504/505 appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 4 v.35 mode sp504 the sp504 requires 150 ohm v.35 termination resistors to be installed between sd(b) & ground, st(b) & ground and tt(b) and ground for com- pliant v.35 operation. resistors should be 1/4 watt 1% tolerance. be sure to remove the v.35 termination resistors when using any other mode. SP505 the SP505 contains all necessary v.35 termina- tion resistors internally. therefore, no external termination resistors are necessary for the SP505 device for compliant v.35 operation. v.11 (rs-422) mode sp504 the sp504 may require termination resistors to be installed onto the receiver inputs for clock and data signals. per the v.11 specification, cable termination is optional but is recommended to reduce signal crosstalk and reflection on the transmission line when operating at higher speeds (over 300kbps). if needed, a 120ohm resistor should be placed between the a and b inputs of the clock and data receivers. specifically, rd(a) & rd(b), rt(a) & rt(b), and sct(a) & sct(b). the resistors should be removed when not operating in a mode using rs-422. SP505 the SP505 contains all necessary v.11 termina- tion resistors internally. therefore, no external termination resistors are necessary for the SP505 device for compliant v.11 operation. using the db-25 connector the db-25 connector is configured as a dte for a eia-530 pinout. in order to connect to other dce equipment or network analyzers (i.e. ttc's fireberd 6000a), the rxc receiver output must loop back into the txc driver input. the rxd output can also be looped back to the txd input. if connecting the evaluation board to a microcontroller such as the motorola mc68360, jumper wires of the driver inputs and receiver outputs must connect to the uc's appropriate pins.
504/505appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 5 sp504 pin assignments pin # pin name pin function pin description clock & data group 1 rxd ttl output receive data rxd receiver. 14 txd ttl input transmit data txd driver. 15 txc ttl input transmit clock tt driver. 20 rxc ttl output receive clock rxc receiver. 22 st ttl input send timing st driver. 37 rt(a) analog input receive timing rxc receiver. 38 rt(b) analog input receive timing rxc receiver. 42 st(a) analog output send timing st driver. 44 st(b) analog output send timing st driver. 59 sd(b) analog output send data txd driver. 61 sd(a) analog output send data txd driver. 63 tt(a) analog output terminal timing txc driver. 65 tt(b) analog output terminal timing txc driver. 70 rd(a) analog input receive data rxd receiver. 71 rd(b) analog input receive data rxd receiver. 76 sct(a) analog input serial clock transmit sct receiver. 77 sct(b) analog input serial clock transmit sct receiver. 79 sct ttl output serial clock transmit sct receiver.
504/505 appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 6 sp504 pin assignments (cont) pin # pin name pin function pin description control line group 13 dtr ttl input data terminal ready dtr driver. 16 rts ttl input ready to send rts driver. 17 rl ttl input remote loopback rl driver. 18 v35_stat ttl output outputs logic high in v.35 mode. 19 dcd ttl output data carrier detect dcd receiver. 21 ri ttl output ring indicate ri receiver. 24 ll ttl input local loopback ll driver. 35 rr(a) analog input data carrier detect dcd receiver. 36 rr(b) analog input data carrier detect dcd receiver. 39 ic(a) analog input incoming call ri receiver. 40 ic(b) analog input incoming call ri receiver. 45 rl(b) analog output remote loopback rl driver. 47 rl(a) analog output remote loopback rl driver. 49 ll(b) analog output local loopback ll driver. 51 ll(a) analog output local loopback ll driver. 52 rs(b) analog output ready to send rts driver. 54 rs(a) analog output ready to send rts driver. 56 tr(b) analog output terminal ready dtr driver. 58 tr(a) analog output terminal ready dtr driver. 66 cs(a) analog input clear to send cts receiver. 67 cs(b) analog input clear to send cts receiver. 68 dm(a) analog input data mode dsr receiver. 69 dm(b) analog input data mode dsr receiver. 78 dsr ttl output data set ready dsr receiver. 80 cts ttl output clear to send cts receiver.
504/505appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 7 pins 25, 33, 41 48, 55, 62, 73, 74 connect to vcc +5 volts. pins 29, 34, 43, 46, 50, 53, 57, 60, 64, 72, 75 connect to ground. pin 27 is vdd +10 volts. connect 22uf 16 volt capacitor between pin 27 and vcc. pin 32 is vss -10 volts. connect 22uf 16 volt capacitor between pin 32 and ground. pins 26 & 30 are c1+ & c1-. connect 22uf 16 volt capacitor between pin26 & pin 30. pins 28 & 31 are c2+ & c2-. connect 22uf 16 volt capacitor between pin28 & pin 31. note: nc pins should be left floating as internal signals may be present. ensure all vcc and ground connections are made before operating device. sp504 pin assignments (cont) power supplies pin # pin name pin function pin description control registers 2 rdec0 ttl input receiver mode select line. 3 rdec1 ttl input receiver mode select line. 4 rdec2 ttl input receiver mode select line. 5 rdec3 ttl input receiver mode select line. 6 tten ttl input enable control tt driver (active low). 7 scten ttl input enable control sct receiver (active high). 9 tdec3 ttl input driver mode select line. 10 tdec2 ttl input driver mode select line. 11 tdec1 ttl input driver mode select line. 12 tdec0 ttl input driver mode select line.
504/505 appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 8 SP505 pin assignments pin # pin name pin function pin description clock & data group 1 rxd ttl output receive data rxd receiver. 14 txd ttl input transmit data txd driver. 15 txc ttl input transmit clock tt driver. 20 rxc ttl output receive clock rxc receiver. 22 st ttl input send timing st driver. 37 rt(a) analog input receive timing rxc receiver. 38 rt(b) analog input receive timing rxc receiver. 42 st(a) analog output send timing st driver. 44 st(b) analog output send timing st driver. 59 sd(b) analog output send data txd driver. 61 sd(a) analog output send data txd driver. 63 tt(a) analog output terminal timing txc driver. 65 tt(b) analog output terminal timing txc driver. 70 rd(a) analog input receive data rxd receiver. 71 rd(b) analog input receive data rxd receiver. 76 sct(a) analog input serial clock transmit sct receiver. 77 sct(b) analog input serial clock transmit sct receiver. 79 sct ttl output serial clock transmit sct receiver.
504/505appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 9 SP505 pin assignments (cont) pin # pin name pin function pin description control line group 13 dtr ttl input data terminal ready dtr driver. 16 rts ttl input ready to send rts driver. 17 rl ttl input remote loopback rl driver. 19 dcd ttl output data carrier detect dcd receiver. 21 ri ttl output ring indicate ri receiver. 24 ll ttl input local loopback ll driver. 35 rr(a) analog input data carrier detect dcd receiver. 36 rr(b) analog input data carrier detect dcd receiver. 39 ic(a) analog input incoming call ri receiver. 40 ic(b) analog input incoming call ri receiver. 45 rl(b) analog output remote loopback rl driver. 47 rl(a) analog output remote loopback rl driver. 49 ll(b) analog output local loopback ll driver. 51 ll(a) analog output local loopback ll driver. 52 rs(b) analog output ready to send rts driver. 54 rs(a) analog output ready to send rts driver. 56 tr(b) analog output terminal ready dtr driver. 58 tr(a) analog output terminal ready dtr driver. 66 cs(a) analog input clear to send cts receiver. 67 cs(b) analog input clear to send cts receiver. 68 dm(a) analog input data mode dsr receiver. 69 dm(b) analog input data mode dsr receiver. 78 dsr ttl output data set ready dsr receiver. 80 cts ttl output clear to send cts receiver.
504/505 appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 10 SP505 pin assignments (cont) pin # pin name pin function pin description power supplies pins 25, 33, 41 48, 55, 62, 73, 74 connect to vcc +5 volts. pins 29, 34, 43, 46, 50, 53, 57, 60, 64, 72, 75 connect to ground. pin 27 is vdd +10 volts. connect 22uf 16 volt capacitor between pin 27 and vcc. pin 32 is vss -10 volts. connect 22uf 16 volt capacitor between pin 32 and ground. pins 26 & 30 are c1+ & c1-. connect 22uf 16 volt capacitor between pin26 & pin 30. pins 28 & 31 are c2+ & c2-. connect 22uf 16 volt capacitor between pin28 & pin 31. note: ensure all vcc and ground connections are made before operating device. control registers 2 sden ttl input enable control sd driver (active low). 3 tren ttl input enable control tr driver (active low). 4 rsen ttl input enable control tr driver (active low). 5 llen ttl input enable control ll driver (active low). 6 tten ttl input enable control tt driver (active low). 7 scten ttl input enable control sct receiver (active high). 8 latch ttl input latch control logic high is transparent. 9 tdec3 ttl input receiver & driver mode select line. 10 tdec2 ttl input receiver & driver mode select line. 11 tdec1 ttl input receiver & driver mode select line. 12 tdec0 ttl input receiver & driver mode select line. 18 rlen ttl input enable control rl driver (active low).
504/505appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 11 sp504 from function to function SP505 pin 2 rdec0 ttl input /sden ttl input pin 2 pin 3 rdec1 ttl input /tren ttl input pin 3 pin 4 rdec2 ttl input /rsen ttl input pin 4 pin 5 rdec3 ttl input /llen ttl input pin 5 pin 8 n/c n/c /latch ttl input pin 8 pin 9 tdec3 ttl input dec3 ttl input pin 9 pin 10 tdec2 ttl input dec2 ttl input pin 10 pin 11 tdec1 ttl input dec1 ttl input pin 11 pin 12 tdec0 ttl input dec0 ttl input pin 12 pin 18 v35_stat ttl output /rlen ttl input pin 18 summary in the sp504, pins 2-5 control the mode input word used to configure the receivers. pin 8 is no connection and pin 18 is the v35_stat status notification output which is often used to control the v.35 150 ohm termination resistor switches. pins 9-12 are for the driver mode input word. in the SP505, the 4 receiver mode input bits and the 4 driver mode input bits are combined into a single 4 bit mode input word. pins 2-5 control the enable (active low) function for the drivers txd, dtr, rts & ll, respectively. pin 8 controls the transparent latch /latch (active low) function, used to latch in the last mode input word. pin 18 controls the enable (active low) function for the rl driver. pins 9-12 control the combined mode input word dec3, dec2, dec1 & dec0, respectively. sp504 + SP505 pinout changes
504/505 appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 12 rs- 232 l l h l l l h l v.35 h h h l h h h l rs-422 l h l l l h l l rs-485 l h l h l h l h rs-449 h h l l h h l l eia-530 h h l h h h l h eia-530a hhhhhhhh v.36 l h h l l h h l sp504 mode select mode tdec3 tdec2 tdec1 tdec0 rdec3 rdec2 rdec1 rdec0 active l l l tri-state h h l tri-state control sten tten scten note: for v.35 mode, install 150ohm resistors between pin 44 & gnd, pin 59 & gnd and pin 65 & gnd. dip switch settings are rocker down for "l" and rocker up for "h".
504/505appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 13 sden l h tren l h rsen l h rlen l h llen l h sten l h tten l h scten h l SP505 mode select mode dec3 dec2 dec1 dec0 rs-232 l l h l v.35 h h h l rs-422 l h l l rs-485 l h l h rs-449 h h l l eia-530 h h l h eia-530a h h h h v.36 l h h l tri-state control active tri-state latch control transparent latch latch h l note: dip switch settings are rocker down for "l" and rocker up for "h".
504/505 appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 14 rs-232 & eia-530 connector (iso 2110) dte connector db-25 pin male dce connector db-25 pin female 1 13 14 25 7 20 eia-232 eia-530 eia-449 signal name source mnemonic pin mnemonic pin mnemonic pin shield 1 1 1 transmitted data dte ba 2 ba (a) 2 sd (a) 4 ba (b) 14 sd (b) 22 received data dce bb 3 bb (a) 3 rd (a) 6 bb (b) 16 rd (b) 24 request to send dte ca 4 ca (a) 4 rs (a) 7 ca (b) 19 rs (b) 25 clear to send dce cb 5 cb (a) 5 cs (a) 9 cb (b) 13 cs (b) 27 dce ready (dsr) dce cc 6 cc (a) 6 dm (a) 11 cc (b) 22 dm (b) 29 dte ready (dtr) dte cd 20 cd (a) 20 tr (a) 12 cd (b) 23 tr (b) 30 signal ground ab 7 ab 7 sg 19 recv. line sig. det. (dcd) dce cf 8 cf (a) 8 rr (a) 13 cf (b) 10 rr (b) 31 trans. sig. elemt. timing dce db 15 db (a) 15 st (a) 5 db (b) 12 st (b) 23 recv. sig. elemt. timing dce dd 17 dd (a) 17 rt (a) 8 dd (b) 9 rt (b) 26 local loopback dte ll 18 ll 18 ll 10 remote loopback dte rl 21 rl 21 rl 14 ring indicator dce ce 22 trans. sig. elemt. timing dte da 24 da (a) 24 tt (a) 17 da (b) 11 tt (b) 35 test mode dce tm 25 tm 25 tm 18 v.35 mnemonic pin a 103 p 103 s 104 r 104 t 105 c 106 d 107 e 108 h * 102 b 109 f 114 y 114 aa 115 v 115 x 141 l * 140 n * 125 j * 113 u * 113 w * 142 nn * x.21 mnemonic pin 1 circuit t(a) 2 circuit t(b) 9 circuit r(a) 4 circuit r(b) 11 circuit c(a) 3 circuit g 8 7 14 circuit c(b) 10 circuit i(a) 5 circuit i(b) 12 circuit b(a)** circuit b(b)** * - optional signals ** - only one of the two x.21 signals, circuit b or x, can be implemented and active at one time. 6 13 circuit s(a) circuit s(b) 7 14 circuit x(a)** circuit x(b)**
504/505appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 15 component part number manufacturer contact small pins 00-15-01-30-27-04-0 mill-max mfg. corp 22uf capacitors t491c226k016as kemet 10uf capacitors t351c106k10as301 kemet schottky diode mbrs140t3 motorola resistors rn55d4990f dale dip switches 435640-5 amp db-25 connector db25p-frs (89n1586) spc (newark elect.) aluminum spacers generic 8x32 screws generic evaluation board list of materials
504/505 appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 16 22 m f22 m f 22 m f 27 26 30 28 31 32 mbrs140t3 v cc v dd c1- c2- v ss c1+ c2+ 22 m f 61 59 SP505cf drivers txd 14 58 56 dtr 13 54 52 rts 16 63 65 txc 15 42 44 st 22 47 45 rl 17 51 49 ll 24 70 71 rxd 1 37 38 rxc 20 66 67 cts 80 68 69 dsr 78 35 36 dcd 19 39 40 ri 21 76 77 sct 79 receivers 10 m f db-25 connector pins 2 txd(a) 14 txd(b) 20 dtr(a) 23 dtr(b) 19 rts(b) 4 rts(a) 11 txce(b) 18 ll 15 sct(a) 12 sct(b) dec3 dec2 dec1 dec0 12 11 10 9 scten tren sden v arious vcc pins (refer to sp504 datasheet) #103 #108 #105 #113 itu # #141 #104 #115 #106 #107 #109 #142 #114 (applies for dte only) 24 txce(a) 3 rxd(a) 16 rxd(b) 8 dcd(a) 10 dcd(b) various gnd pins (refer to SP505 datasheet) 7 signal gnd 13 cts(b) 6 dsr(a) 22 dsr(b) 9 rxc(b) 5 cts(a) 17 rxc(a) 25 tm rsen rlen llen sten tten 2 3 4 18 5 23 6 7 latch 8 gnd +5v #140 dip switch +5v +5v dip switch all 500 w all 500 w 21 rl
504/505appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 17
504/505 appnote/03 new sp504/505 evaluation board ? copyright 2000 sipex corporation 18 corporation signal processing excellence sipex corporation reserves the right to make changes to any products described herein. sipex does not assume any liability aris ing out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. sipex corporation headquarters and sales office 22 linnell circle billerica, ma 01821 tel: (978) 667-8700 fax: (978) 670-9001 e-mail: sales@sipex.com sales office 233 south hillview drive milpitas, ca 95035 tel: (408) 934-7500 fax: (408) 935-7600

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