ib technology 1 data sheet uni_rs232_usb.pdf 9 pages last revised 03/09/09 universal rfid socket board with rs232 / usb interf ace the universal rfid socket board is the baseboard fo r the microrwd rfid reader modules from ib technology. microrwd modules are low-cost, pin compatible and h ost command compatible proximity reader modules for hitag 1, hitag s256/2048, hitag 2, mifare 1k/4k/ultralight, icode sli and em400x/4102 rfid tags and contactless smart car ds. the module solutions only require a 5v supply and an antenna coil to be fully feature d read/write systems with optimised easy to use host commands. all modules use the same univers al 24 pin dip package so customers can migrate between different transponder technology wi th the minimum of design change. the universal socket board provides the antenna, power supply regulation and rs232 / usb interfaces to the microrwd module itself. specifically the board has a 24 pin dip socket for the appropriate microrwd module to be plugged into, leds for visual status indication, selectable pcb and coil based antenna for 13.56mhz and 125khz operation and voltage regulation allowing 9-12v dc power supplies to be used. the universal socket board with the appropriate microrwd module fitted is a complete ready-to-use rfid reader system and is used in the sdk/evaluation kit together with sample tags/cards and cdrom containing all the data sheets and windows applications (executable and c source). mifare quad tag hitag 1/s hitag 2 icode em marin 75 mm 82 mm
ib technology 2 universal socket board (with 125khz coil antenna mo unted on the underside) was designed to fit in the evatron eva73 plastic case giving the op tion of a fully enclosed product. the universal socket board can be powered directly from a stabilised 5 volt supply, from the 9-12 volt dc connector or from the usb bus. the mi crorwd module itself has a low average current (approximately 15-20ma) but consume s up to 200ma in a short burst every polling cycle when the rf is turned on for the brie f communication period. the universal socket board uses a 470uf capacitor across the supp ly rails to smooth these current pulses and so the entire board consumes around 60 ma and can o perate directly from a usb bus with no external power supply. universal socket board link options the board has link options to select the on-board 1 3.56mhz pcb antenna or the external 125khz antenna coil and various options for supplyi ng power to the board and interfaces. 1 op1 op0 mclr / (vpp) rx / (data) tx / (clk) gnd cts sw1 0v gnd 5v con j9, 2 x 10 x 0.1 inch pin header (all available signals, 5v supply and gnd) red led grn led op3 op2 usb sleep usb clk usb pwren usb reset 0v gnd 5v con j1, 9-12v dc, 2.5mm power socket (+ve centre pin ) con j10, rs232 socket (9-way female d-type connector) usb connector red green leds con j6, 125khz antenna connections an3 an5 an4 an6 an1 an2 con j8, 125khz or 13.56mhz antenna selection con j3, 0.1, 2-way pin header, 5v stabilised supply (gnd, +5v) rwd pin 1 j2 connects power from regulator to board. j7 connects power to max202 rs232 converter j4 connects power to usb module j5 connects external usb bus 5v to board
ib technology 3 connector and link descriptions a) con j1 (2.5mm power socket (+ve centre pin): connector for external 9-12v dc supply. b) link j2 (2 pin, 0.1 inch header): connects 5 volt output from on-board voltage regula tor to the rest of the board. c) con j3 (2 pin , 0.1 inch polarised connector): connector for external 5v stabilised power supply t o board. d) link j4 (2 pin, 0.1 inch header): connects 5 volt supply on board to usb module. e) link j5 (2 pin, 0.1 inch header): connects external usb bus 5 volt supply to the rest of the board. f) con j6 (2 pin, 0.1 inch header): connection for external 125khz, 700 uh antenna coil . g) link j7 (2 pin, 0.1 inch header): connects 5 volt supply on board to max202 rs232 lev el converter. h) links j8 (6 pin, 0.1 inch header): selects on-board 13.56mhz pcb antenna or external 1 25khz antenna coil. i) con j9 (2 x 10 way, 0.1 inch header): j) con j10 (9 pin female, d-type): rs232 connector (1, 4, 6 joined, 2 C tx, 3 C rx, 5 C gnd, 8 C cts) an3 an5 an4 an6 an1 an2 an3 an5 an4 an6 an1 an2 for 125 khz antenna link an1-an5 an2-an6 for 13.56 mhz antenna link an1-an3 an2-an4 1 op1 op0 mclr / (vpp) rx / (data) tx / (clk) gnd cts sw1 0v gnd 5v red led grn led op3 op2 usb sleep usb clk usb pwren usb reset 0v gnd 5v all available interface signals from rwd module and usb module.
ib technology 4 operation of microrwd module only with 5 volt exter nal supply with a microrwd module fitted and the 13.56mhz or 1 25khz antenna selected, the module can be powered from an external 5 volt stabilised s upply connected to con j3 or con j9. the interface and communication pins can also be ac cessed directly from con j9. for this case the links j2, j4, j5, j7 can be removed to ens ure that only the microrwd module is powered and the max202 and the usb module (if fitte d) are off. operation of microrwd module using rs232 interface the microrwd module can be powered from an external 5 volt stabilised or 9-12 volt un- regulated supply (link j2 set accordingly). for rs2 32 communication, link j7 should be closed to power the max202 device. a standard rs232 extension cable (straight-through, pin-to-pin) is used to connect con j10 to a pc com port or other host rs232 interface. operation of microrwd module using usb interface (i f fitted) the microrwd module can be connected to and powered from an external usb bus. to ensure the board consumes minimum power, links j 2 and j7 should be removed to disconnect the max202 power and regulator supply. links j4 and j5 should then be closed to connect the external usb bus 5 volt supply to th e usb module and the microrwd itself. the universal rfid socket board uses the low-cost f tdi (future technology devices international ltd) mm232r serial to usb converter module. if not already fitted, the module can be purchased on-line from http://www.ftdichip.com/ the usb module should be connected to the pc usb po rt using a standard usb connecting cable. all the windows applications for the microrw d module currently communicate with the serial com ports and assume rs232 connection. f tdi provide a vcp (virtual com port) driver for the mm232r module that allows stan dard rs232 communication programs to operate over the usb bus. the vcp drivers for vario us operating systems can be downloaded from http://www.ftdichip.com/drivers/vcp.htm and installed according to the supplied instructions (vcp driver file: cdm 2.00.00 or later). with the universal rfid board connected to the usb bus, the windows applica tions can be run in the usual manner with a com port selected higher than the maximum co m port number on the pc being used. ftdi usb C serial interface module mm232r
ib technology 5 ftdi mm232r usb module pin out and pcb pad layout 0v gnd +5v link j4 2-way pin header link j5 2-way pin header for usb powered rfid board, short linksj4 and j5 for external 5v supply, short link j4, open link j 5 rx tx cts usb sleep usb clk12 usb pwren usb reset c7 ftdi mm232r usb/rs232 module, mod1 connected to microrwd cts, tx and rx pins
ib technology 6 rs232 interface circuit and connector pin out max202 u2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 0v ground plane 5 1 6 9 con j10, 9 way d-type socket rs232 connector cts tx rx + c3 c18 c17 c14 c15 1, 4, 6 - joined 2 C tx 3 C rx 5 C gnd 8 - cts tx rx cts +5v connected to microrwd cts, tx and rx pins con j7 2 - way pin he ader (dcd, dtr, dsr joined) microrwd cts (busy) connected to cts c16
ib technology 7 microrwd module interface circuit and pin out tx rx cts 1 13 12 micro rwd (mod2) d1, green led d2 red led r1, r3 1k sw1 0v gnd rwd +5v 24 rwd +5v op0 op1 0v gnd rwd +5v an1 an2 op3 op2 an3 an5 an4 an6 an1 an2 con j8 for 125khz antenna link an1-an5, an2-an6 for 13.56mhz ant link an1-an3, an2, an4 r2, r8 r4, r9 mclr/vpp 1 uh pcb antenna (l2) ant1, l3 700uh antenna 47pf 47pf an5 an6 27r c19, 5-50pf trimming capacitor c13 = 22pf c12 = 22pf c10 = 180pf c11 = 220pf r6, 0r r7, 0r an3 an4 through hole solder pads for wire coil connection. r5 c8, c9 c2, 470uf low esr 47nf l1, 22uh 0v gnd rwd+5v 47nf lm1117 reg (u1) +5v link j2 0.1, 2 - way pin header c6 c5 c1 c4 con j3, 0.1, 2-way pin header, 5v stabilised supply c20 1 op1 op0 mclr/vpp rx(data) tx(clk) gnd cts sw1 0v gnd 5v con j9, 2 x 10 x 0.1 inch pin header red led grn led op3 op2 usb sleep usb clk usb pwren usb reset 0v gnd 5v con j1, 9-12v dc, 2.5mm power jack socket (+ve centre pin )
ib technology 8 microrwd pin out pin name dip no. i/o type buffer type description led1 1 o ttl red led connection. 25ma max sink curr ent led2 2 o ttl green led connection. 25ma max sink cu rrent reset 3 i st reset pin internally pulled high. acti ve low. normally not connected sw1 4 i st switch input to override output drives o r select baud rate. internally pulled high. active low op3 5 o ttl aux output drive. 25ma max sink current . op2 6 o ttl aux output drive. 25ma max sink current . gnd 7 p - ground reference for logic and analogue p ins vcc 8 p - +5v positive supply an1 9 p an antenna connection. up to 200ma peak cur rent. +/- 100v peak voltage. 125khz or 13.56mhz drive into 700 uh or 1 uh antenna. - 10 - - not connected - 11 - - not connected an2 12 p an antenna connection. gnd 13 p - ground reference for logic and analogue pins. normally used for antenna screen connection - 14 - - not connected - 15 - - not connected - 16 - - not connected - 17 - - not connected - 18 - - not connected op1 19 o ttl aux output drive. 25ma max sink curren t. op0 20 o ttl aux output drive. 25ma max sink curren t. vcc 21 p - +5v positive supply rx 22 i ttl serial communication receive line. 9600 baud, 8 bit, 1 stop, no parity tx 23 o ttl serial communication transmit line cts 24 o ttl serial communication cts handshake. r x enabled when cts low and disabled when high. (i/o = input/output, an = antenna output, p = power, st = schmitt trigger input, ttl = ttl l ogic i/o) 1 13 12 micro rwd 24 30.5 mm 17.5mm standard 0.1 inch / 2.54 mm pitch. wide 24 pin dil layout. pins mounted to hybrid flush with substrate. pcb row spacing 17.5 mm unconnected pin pads
ib technology 9 universal rfid socket board specifications basic preliminary electrical specifications. parameter typical value supply voltage 5v dc regulated or 9-12v dc unregulated. operating temperature -25 deg c to + 70 deg c average current consumption: microrwd + leds only (default 100ms rf-off polling delay) approx 20ma average current consumption: microrwd + leds + rs232 interface. approx 25ma average current consumption: microrwd + leds + usb interface. approx 25ma maximum board current (microrwd + all interfaces ac tive) approx 60ma peak antenna voltage (optimum antenna tuning) up to +/- 100v (200v peak-to-peak) peak antenna current (optimum tuning) up to 200ma communication time for tag authentication 20ms (hi tag) communication time for 32 bit write operation 30ms (hitag) maximum data rate (between tag and rwd) 4k baud or 53 / 106k baud range (dependent on antenna dimensions and tuning) up to 20cm (125khz) or 10cm (13.56mhz) auxiliary output drive current up to 25ma sink switch input (pulled up) active low serial interface ttl level rs232 or +/- 12v rs232 communication parameters (depending on microrwd typ e) 9600/38400 baud, 8 data bits, no parity, 1 stop bit protocol with cts handshake no responsibility is taken for the method of integr ation or final use of microrwd more information on the micro rwd and other product s can be found at the internet web site: http://www.ibtechnology.co.uk or alternatively contact ib technology by email at: sales@ibtechnology.co.uk
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