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EM MICROELECTRONIC - MARIN SA AppNote 405 Application Note 405 Title: Development Kit EM4095 User’s Manual Product Family: RFID Part Number: Keywords: Date: EMDB401 RFID Design Tools 25 September 2002 TABLE OF CONTENT 1 2 3 4 5 6 7 Introduction....................................................................................................................................................................... 2 Transponder Types........................................................................................................................................................... 2 2.1 Read Only Transponder EM4102 .............................................................................................................................. 2 2.2 Read Only Transponder EM4005 .............................................................................................................................. 2 2.3 1kBit Read / Write Transponder EM4150 .................................................................................................................. 2 2.4 Crypt Read / Write Transponder EM4170 ................................................................................................................. 2 2.5 Read Only with Anticollision Transponder EM4025................................................................................................... 2 2.6 2kBit Read / Write Anticollision Transponder EM4056 .............................................................................................. 2 Initial Start-up ................................................................................................................................................................... 2 Interface............................................................................................................................................................................ 2 4.1 Message structure ..................................................................................................................................................... 2 4.2 Communication link ................................................................................................................................................... 3 4.2.1 Communication syntax ....................................................................................................................................... 3 4.2.2 Request messages to the transponder reader ................................................................................................... 4 4.2.3 Response message from the transponder reader .............................................................................................. 5 4.3 Error List.................................................................................................................................................................... 6 4.3.1 Principle Handling of Transponder Reader ........................................................................................................ 7 Software ........................................................................................................................................................................... 8 5.1 Reader flow chart Start of Reader and UART communication .................................................................................. 8 5.2 Command handling ................................................................................................................................................... 9 5.2.1 Flow Chart Transponder EM4102 .................................................................................................................... 10 5.2.2 Flow Chart Transponder EM4005 .................................................................................................................... 11 5.2.3 Flow chart Transponder EM4150 ..................................................................................................................... 12 5.2.4 Flow chart Transponder EM4170 ..................................................................................................................... 13 5.2.5 Flow chart Transponder EM4025 ..................................................................................................................... 14 5.2.6 Flow chart Transponder EM4056 ..................................................................................................................... 15 5.3 Flow chart communication with Transponder .......................................................................................................... 16 6. Hardware .................................................................................................................................................................... 17 6.1 6.1 Description......................................................................................................................................................... 17 6.2 Development Kit EM4095 Circuit Diagram .............................................................................................................. 18 6.3 Development Kit EM4095 Board image................................................................................................................... 19 6.4 Development Kit EM4095 top Layer Image ............................................................................................................. 20 6.5 Development Kit EM4095 bottom layer image ........................................................................................................ 20 Appendix......................................................................................................................................................................... 21 Copyright 2001, EM Microelectronic-Marin SA 1 www.emmicroelectronic.com AppNote 405 1 Introduction The Development Kit EM4095 is designed for a quick step into RFID System design. It contains the EM reader chip EM4095 and a programmed µP with an RS 232 interface. It can be used as a complete reader Module (printed coil on board) or the programmed microcontroller and the reader chip EM4095 can be integrated in customer specific board designs. The Development Kit EM4095 can communicate with the following types of EM Transponder chips: • EM4100 / EM4102 • EM4005 / EM4105 • EM4150 • EM4170 • EM4025 • EM4056 When the DC voltage crosses the Power–On level, the chip will enter the Standby Mode and expect commands. In Standby Mode, a continuous sequence of Listen Windows (LIW) is generated. During this time, the Crypt transponder will turn to the Receive Mode (RM) if it receives a valid RM pattern. The chip then expects a command to enter the desired mode of operation. 2.5 Read Only with Anticollision Transponder EM4025 A transponder is supplied by means of an electromagnetic field induced on the attached coil. The AC voltage is rectified in order to provide a DC internal supply voltage. When the DC voltage crosses the Power–On level, the chip will enter the Quit Mode and waits for a command from the reader. The implemented anticollision protocol allows identifying a variety of transponders placed in the reader field by using dedicated commands. 2.6 It allows the user to communicate with the transponders via serial interface and does not require any knowledge of transponder technology. 2 Transponder Types 2.1 Read Only Transponder EM4102 The Transponder is powered by an electromagnetic field and gets the master clock from the same field. By turning on and off the modulation current, the transponder sends back the 64 bits of information contained in a factory preprogrammed memory array. 2.2 Read Only Transponder EM4005 The Transponder is powered by an electromagnetic field, and gets the master clock from the same field. By turning on and off the modulation current, the transponder sends back the 64 bits of information contained in a factory preprogrammed memory array. 2.3 1kBit Read / Write Transponder EM4150 A transponder is supplied by means of an electromagnetic field induced to the attached coil. The AC voltage is rectified in order to provide a DC internal supply voltage. When the DC voltage crosses the Power–On level, the chip will enter the Standard Read Mode and send data. The data to be sent in this mode is user defined by storing the first and last addresses to be output. When the last address is sent, the transponder continues with the first address until the transceiver sends a request. In the read mode, a Listen Window (LIW) is generated before each word. During this time, the EM4150 will turn to the Receive Mode (RM) if it receives a valid RM pattern. The Transponder then expects a valid command. 2.4 Crypt Read / Write Transponder EM4170 A transponder is supplied by means of an electromagnetic field induced on the attached coil. The AC voltage is rectified in order to provide a DC internal supply voltage. Copyright 2001, EM Microelectronic-Marin SA 2kBit Read / Write Anticollision Transponder EM4056 A transponder is supplied by means of an electromagnetic field induced on the attached coil. The AC voltage is rectified in order to provide a DC internal supply voltage. When the DC voltage crosses the Power–On level, the chip will enter the Quit Mode and waits for a command from the reader. The implemented anticollision protocol allows identifying a variety of transponders placed in the reader field by using dedicated commands. 3 Initial Start-up Before supplying 5V power to the board, connect a serial cable (1:1) to your PC. With a standard terminal program (9600 baud, 8 data bits, no parity, 1 stop bit) you can send commands to the reader in hex format. To start the reader, a request message from the Master (PC) must be sent. The reader answers by means of a response message. 4 4.1 Interface Message structure A Message starts with byte STX (Start of Text). Its value is always equal to 0x02. The next byte (n) transmits the position of the Checksum byte (called CHK), followed by the command byte and if necessary required data bytes to the reader. All the commands for all RFID transponders are described in the following tables. The following 8bit checksum (CHK Byte) for the RS 232 interface is needed for Request and Response messages: The Checksum is calculated byte per byte with XOR operation since “n” Byte up to CHK Byte. CRC = byte1 XOR byte2 XOR … byten-1 Send an ETX (End of Text) after the Checksum Byte for completing the data stream. The value of ETX is equal to 0X03. The response of the transponder reader has the same syntax. 2 www.emmicroelectronic.com AppNote 405 4.2 Communication link 4.2.1 Communication syntax In the following tables the description of the message syntax which is needed for the communication to the Development Kit EM4095 is given. Inside the response message from the RFID transponder, the ACK Byte value is equal to 0X06 and the NACK Byte value is 0X15. configuration of Serial interface 9600 Baud 8 bits no parity no stop bit Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Antenna Short JNQ Channel Reader Coil ON/OFF all values HEX discription of serial bytes start of Text Color /content STX position of checksum byte command n 0 response ACK or NAK ACK/ NAK checksum over byte1 until byte n-1 CHK end of Text ETX error F data ADR Reader Status Bit7 STB0 ( control byte 0 ) 0 0 0 0 Antenna fault STB1 ( control byte 1 ) 0 0 0 0 0 STB2 ( control byte 2 ) 0 0 0 0 0 2 ( 2k Baud ) 3 ( 3,2k Baud ) 4 ( 4k Baud ) 0 0 0 Table 1: Message Format Copyright 2001, EM Microelectronic-Marin SA 3 www.emmicroelectronic.com AppNote 405 4.2.2 Request messages to the transponder reader serial data byte command description ->TagReader 0 1 2 3 4 5 6 7 8 9 A B C D E F 10 CHK ETX CHK ETX TXP EM4170 read ID STX n 01h CHK ETX read UM1 STX n 02h CHK ETX Authentication STX n 03h write word 0-1 STX n 04h write word 12-15 STX n 04h write SKEY STX n 05h MSB word 9 LSB MSB word 8 LSB MSB word 7 LSB MSB word 6 LSB MSB word 5 LSB MSB word 4 LSB write PIN STX n 06h LSB IDw2 MSB LSB IDw3 MSB MSB PINw10 LSB MSB PINw11 LSB CHK ETX send PIN STX n 07h LSB IDw2 MSB LSB IDw3 MSB MSB PINw10 LSB MSB PINw11 LSB CHK ETX read UM2 STX n 08h CHK ETX Read Only Txp read ID 4102 STX n 10h CHK ETX Read Only Txp read ID 4105 STX n 11h CHK ETX MSB word 9 LSB ADR LSB ADR LSB MSB word 8 LSB MSB CHK MSB CHK MSB word 7 LSB MSB word 6 LSB MSB word 5 LSB MSB word 4 LSB ETX ETX TXP EM4102/4105 TXP EM4150 Login STX n 30h 0x01 MSB PW LSB Write Password STX n 31h 0x01 MSB OldPW LSB Write Word* STX n 32h ADR MSB word LSB Selective Read Mode 1 STX n 33h XX XX Reset STX n 34h CHK ETX Read Tag define in Control word2 STX n 35h CHK ETX XX LWR CHK ETX MSB NewPW LSB FWR CHK ETX CHK ETX CHK ETX TXP EM4025 Select - Read ( 30h ) / Toggle ( 24h) STX n 40h Select Select (22h) / Deselect (12h) Customer ID STX n 41h Select C.ID CHK General - Read(14h)/Read if Enable(06h)/Reset(35h) STX n 42h Genral CHK ETX Start Arbitration STX n 43h StartBit* CHK ETX Stop Arbitration STX n 44h CHK ETX ReadRom STX n 50h CHK ETX Select - Toggle ( 04h ) / Tag( 05h) / DeSelectTag ( 06h STX n 51h Select Protection write STX n 52h Adr Wp/Rp Read word STX n 53h Adr CHK Word Access - Write(0Ch) / Add(0Dh) / Comp(0Eh) STX n 54h Access Adr Login STX n 55h CHK MSB Adress LSB ETX ETX *TAG ID bit address range from D20 ( 001000 ) to D92 ( 100110 ) TXP EM4056 CHK MSB Adress LSB LSB Pin MSB Start Arbitration STX n 56h CHK ETX Stop Arbitration STX n 57h CHK ETX CHK ETX ETX ETX MSB word 9 LSB CHK CHK ETX ETX Reader command Status Reader (send autom. after Power ON) STX n FDh CHK ETX switch Coil ON/OFF STX n FEh ON/OFF CHK ETX Change Baudrate STX n FFh BRG4 CHK ETX Table 2: Request messages to the transponder reader Copyright 2001, EM Microelectronic-Marin SA 4 www.emmicroelectronic.com AppNote 405 4.2.3 Response message from the transponder reader serial data byte response TagReader 0 1 2 3 4 5 6 7 8 9 A B C D E F 10 11 12 13 14 15 TXP EM4170 read ID STX n 01h ACK MSB IDw3 LSB MSB IDw2 LSB CHK ETX read UM1 STX n 02h ACK MSB UMw1 LSB MSB UMw0 LSB CHK ETX Authentication STX n 03h ACK CHK ETX CHK ETX write word 0-1 STX n 04h ACK MSB UMw1 LSB MSB UMw0 LSB write word 12-15 STX n 04h ACK MSB UMw15 LSB write SKEY STX n 05h ACK CHK ETX write PIN STX n 06h ACK CHK ETX send PIN STX n 07h ACK CHK ETX read UM2 STX n 08h ACK MSB UMw15 LSB MSB UMw14 LSB MSB UMw13 LSB MSB UMw12 LSB CHK ETX MSB UMw14 LSB MSB UMw13 LSB MSB UMw12 LSB CHK ETX TXP EM4102/4105 Read ID 4102 STX n 10h ACK Customer code Read ID 4105 STX n 11h ACK MSB IDw7 LSB MSB IDw1 LSB MSB IDw0 LSB CHK MSB IDw6 LSB MSB IDw5 LSB ETX MSB IDw4 LSB MSB IDw3 LSB MSB IDw2 LSB MSB IDw1 LSB MSB IDw0 LSB CHK ETX TXP EM4150 Login STX n 30h ACK CHK ETX Write Password STX n 31h ACK CHK ETX Write Word* STX n 32h ACK ADR MSB word LSB CHK ETX STX n 33h ACK ADR MSB word LSB CHK ETX STX n 34h ACK CHK STX n 33h 3 ACK ADR MSB word LSB CHK ETX Select - Read ( 30h ) Toggle ( 24h) STX n 40h ACK BitVal CHK ETX Select (22h) Deselect (12h) Customer ID STX n 41h ACK BitVal CHK ETX General - Read(14h) Read if Enable(06h) STX n 42h ACK Customer code MSB IDw1 LSB MSB IDw0 LSB CHK ETX Start Arbitration STX n 43h ACK Customer code MSB IDw1 LSB MSB IDw0 LSB CHK ETX Stop Arbitration STX n 44h ACK CHK ReadRom Select - Toggle ( 04h ) Tag( 05h) DeSelectTag ( 06h ) STX n 50h ACK CHK ETX STX n 51h TagStat CHK ETX Protection write STX n 52h ACK TagStat CHK ETX Read word Write(0Ch) Add(0Dh) Comp(0Eh) STX n 53h ACK MSB word 9 LSB Prot STX n 54h TagStat CHK ETX Login STX n 55h ACK TagStat CHK ETX Start Arbitration STX n 56h ACK Stop Arbitratrion STX n 57h ACK Selective Read Mode 1 Reset Read Tag define 2 in Control word ETX TXP EM4025 General - Reset(35h) STX n SW_VERSION CHK ETX 42h ACK BitVal CHK ETX ETX TXP EM4056 MSB Adress LSB ACK CHK ETX ACK MSB Adress LSB CHK ETX CHK ETX day month Reader command Status Reader STX n FDh ACK STB2 STB1 switch Coil ON/OFF STX n FEh ACK CHK ETX Change Baudrate STX n FFh ACK CHK ETX (send autom. after Power ON) STB0 0 year MSB LSB Table 3: Response message from the transponder reader * Verification automatically 1 2 3 send for each requested word send for each word defined in the control word switch automatically to selective read Copyright 2001, EM Microelectronic-Marin SA 5 www.emmicroelectronic.com AppNote 405 4.3 Error List Below you find the Error List sent by the Development Kit EM4095. Inside the Response message a Status Byte will indicate if the message is correct or if something wrong happens. In effect, if the Development Kit EM4095 send you a NACK byte (which value is 0X15), you will have to analyze the value of the next byte and refer to the following table. no. 0x01 0x02 0x03 0x04 0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17 0x18 0x19 0x1A 0x1B 0x1C 0x1D 0x20 0x30 0x31 0x32 0x33 0x34 0x35 0x36 Description Antenna Fault timout power up timout read Txp 10 times IQ changed read ID- Fault read ID checksumm Fault read UM Fault read UM Parity Fault None LIW wrong adress writing content fault wrong data parity error word write protected NAK receive unknown command after sel.read Logbits not reset Timeout no answer from Tag Timeout RF Error flag overflow uart buffer wrong inv. Commmand wrong crc unknown command none ETX interbyte error Error from Reader Asic Reader Asic Reader Asic Reader Asic STxp STxp STxp STxp 4070/4050 4070/4050 4070/4050 4050 4050 4050 4050 4050 4170 4025 RF Uart Uart Uart Uart Uart Uart Uart Error Message example sent Dev. Kit EM4095: Message: 02 05 10 15 10 10 03 0x02: 0x05: 0x10: 0x15: 0x10: 0x10: 0x03: Start of Text Position of the Checksum Kind of Command NACK Kind of Error : Problem of reading tag’s ID Checksum of the Data Stream = 05 XOR 10 XOR 15 XOR 10 End of Text Table 4 : Error List Copyright 2001, EM Microelectronic-Marin SA 6 www.emmicroelectronic.com AppNote 405 4.3.1 Principle Handling of Transponder Reader Start of Operation Switch Power On Receive Startup Message ChipSet 4095 Subroutine Send command Sub. Send command "Coil ON" Send command to reader Sub. Send command "Change Baudrate" No Response from reader Sub. Send command Transponder command Yes Yes Analyse received Data additional action End of Subroutine No Sub. Send command "Coil OFF" end of Operation Figure 1 : Principle Handling of Transponder Reader Copyright 2001, EM Microelectronic-Marin SA 7 www.emmicroelectronic.com AppNote 405 5 5.1 Software Reader flow chart Start of Reader and UART communication Start Reader Start Receive UARt INT Init µC send Reader status via Uart INT occured enable Receive Uart INT Byte receive OK No clr status "new message" 1 Yes set status "NEW MESSAGE" 1 Yes if ( 1 ) STX received state machine status NEW MESSAGE No No 1 No 1 Yes fill uart buffer ETX received Yes CRC OK No clr status "new message" 1 Yes Disable receive Interrupt Task 1 Analyse command clr status "new message" 1 end of Interrupt Figure 2: Reader flow chart Start of Reader and UART communication Copyright 2001, EM Microelectronic-Marin SA 8 www.emmicroelectronic.com AppNote 405 5.2 Command handling Task 1 Analyse command Yes transfer status Data to uart buffer 1 Yes shutdown off Wait 35ms 1 Yes shutdown on 1 Yes Change Baudrate 1 Yes state command 4100 1 Yes state command 4105 1 Yes state command 4150 1 Yes state command 4170 1 command 4025 Yes state command 4025 1 command 4056 Yes state command 4056 1 Status Reader No Coil On command No Coil Off command No Change Baudrate No command 4100 No command 4105 No command 4150 No 1 command 4170 No Send ACK | NAK & Data via Uart enable Receive Uart INT enable Receive Uart INT end Task1 Figure 3: Command handling Copyright 2001, EM Microelectronic-Marin SA 9 www.emmicroelectronic.com AppNote 405 5.2.1 Flow Chart Transponder EM4102 command 4100 Start Int errupt Interrupt occured Read bit time save data bit start Read INT No No status "READ ID OK" 64bi ts readed Yes Yes header ok disabl e Read INT set st atus "READ ID OK" No Yes Parity line chec k O K No Yes Parity row chec k O K No No 10 ti mes readi ng invert 64 b its header ok No Yes 1 Yes Yes Parit y line chec k O K No Yes 1 Parity row chec k O K Yes No return end of Interrupt Figure 4: Flow Chart Transponder EM4102 Copyright 2001, EM Microelectronic-Marin SA 10 www.emmicroelectronic.com AppNote 405 5.2.2 Flow Chart Transponder EM4005 command 4105 Start Interrupt Interrupt occured Read bit time save data bit start Read INT No 128bits readed No Yes disable Read INT set status "READ ID OK" status "READ ID OK" Yes header ok No Yes crc ok No No 10 times reading invert 128bits header ok Yes No Yes 1 Yes crc ok 1 No Yes return end of Interrupt Figure 5: Flow Chart Transponder EM4005 Copyright 2001, EM Microelectronic-Marin SA 11 www.emmicroelectronic.com AppNote 405 5.2.3 Flow chart Transponder EM4150 2 command 4150 No 10 times Yes 3 set status "LIW MODE" No Login command prep. Login command start rd INT No Write Password prep. write Password command start rd INT Yes status "WRITE FINISH" Yes ACK & Data OK 3 2 Yes Yes No prep. selct. read command start rd INT 3 3 No status "DATA READ OK" Yes ACK & Data OK No prep. Reset command start rd INT prep. read tag command start rd INT 2 Yes No status "DATA READ OK" Yes No No ReadTag define in Ctrl word ACK & Data OK No status "WRITE FINISH" prep. write word command start rd INT No Reset Yes 2 No No Select. Read Mode status "DATA READ OK" No No Write word No ACK & Data OK 2 Yes No status "DATA READ OK" Yes ACK & Data OK 3 3 2 Yes 3 return Figure 6: Flow chart Transponder EM4150 Copyright 2001, EM Microelectronic-Marin SA 12 www.emmicroelectronic.com AppNote 405 5.2.4 Flow chart Transponder EM4170 command 4170 2 No 10 times Yes 3 set status "LIW MODE" No Read ID Yes prep. ID command start rd INT status "DATA READ OK" Yes prep. UM1 command start rd INT calc. crypt prep. Auth. command start rd INT write w0 | w1 Yes prep. write command start rd INT Yes prep. write command start rd INT No Yes Yes 3 3 status "WRITE FINISH" Yes 3 set status "LIW MODE" write next SKEY word Yes last SKEY written Yes 3 last PIN written Yes 3 set status "LIW MODE" write next PIN word No prep. write command start rd INT status "WRITE FINISH" Yes No No Yes prep. PIN command start rd INT No read UM2 Yes Yes status "WRITE FINISH" No No send Pin 2 status "WRITE FINISH" No prep. write command start rd INT No write Pin g-fkt. Ok 3 No No write SKEY Yes No No write w12 | w15 Yes 3 2 No status "DATA READ OK" No Yes 2 of 3 Ok Yes No Yes 2 No status "DATA READ OK" No Authentication ID CRC Ok Yes No No Read UM1 No status "DATA READ OK" Yes ID CRC Ok prep. UM2 command start rd INT Yes No No Yes 2 status "DATA READ OK" Yes 2 of 3 Ok 3 2 Yes 3 No 3 return Figure 7: Flow chart Transponder EM4170 Copyright 2001, EM Microelectronic-Marin SA 13 www.emmicroelectronic.com AppNote 405 5.2.5 Flow chart Transponder EM4025 Power ON RdEnb = 0 Init Quiet Mode No Get Command Yes Abort Abritration first two bit = 00 No Yes Yes General Read / IF Enabled if Abort command send memory array Yes No No Yes Yes No Start Abritration General Read No RdEnb = 0 No Yes No Modify RdEnb bit equal Yes Yes modify RdEnb No Bit D93 send RdEnb Yes No send memory array RdEnb = 1 send next BitVal Figure 8: Flow chart Transponder EM4025 Copyright 2001, EM Microelectronic-Marin SA 14 www.emmicroelectronic.com AppNote 405 5.2.6 Flow chart Transponder EM4056 Power ON RdEnb = 0 Init Quiet Mode No Get Command Yes continue Arbitration No Yes ReadRom Yes send memory array No Start Abritration Yes No RdEnb = 0? No Yes No Modify EEPROM bit equal Yes Yes No send EEPROM content / status & CRC 32nd Bit Yes No send next BitVal write EEPROM send CRC RdEnb = 1 Figure 9: Flow chart Transponder EM4056 Copyright 2001, EM Microelectronic-Marin SA 15 www.emmicroelectronic.com AppNote 405 5.3 Flow chart communication with Transponder Start Read INT Start Write INT Start Wait Timer INT occured INT occured INT occured pulse measurement write next bit wait write time over LIW MODE Yes LIW Algorithmus LIW acknowledged all bits send No READ MODE No 2 dis. Timer INT set status "WRITE FINISH" Yes Yes save bit in buffer write word command Yes No complete data read Yes No enable Read INT switch to "READ MODE" switch to write Tag enable write INT start timer for E2PROM write time TAG Yes Set Status "DATA READ OK" No 1 No disable read INT disable write INT 1 2 end of read INT end of write INT End Timer Figure 10: Flow chart communication with Transponder Copyright 2001, EM Microelectronic-Marin SA 16 www.emmicroelectronic.com AppNote 405 6 Hardware 6.1 Description The Development Kit EM4095 is a complete Reader board including coil which only needs an 5 V power supply and communicates with an RS 232 interface. The board can be integrated into a customer specific application or parts of the schematic can be integrated in a customer specific board design. The CryptCo microcontroller which calculates the crypt functions for the EM4170 Crypt Transponder is only needed for this type of transponder. On the following pages the circuit diagram of the chip set board, and the layout is documented. The board can be used with the printed reading coil or an external coil can be connected; in this case the connection to the printed coil should be disabled. When using an external coil the resonance capacitors should be changed, so that the circuit is tuned to resonance. Details are described in the EM4095 application note. So, if you want to connect your own antenna to the Development Kit EM4095, you will have to: • Disconnect the integrated coil by cutting the two nets, which are connected, to LB1 & LB2. • Connect your antenna to X6 & X7. • Use the EM4095 Excel worksheet to calculate the value of capacitors C1, C2 & C3. This sheet can be found on EM's website www.emmicroelectronic.com. To calculate these 3 capacitor values, you will have to measure previously some specifications of your antenna: • Coil value in Henry to determine the value of C1. • Q Quality factor: Q = (L * W) / Rs. Rs is the serial resistor of the Antenna. With the Development Kit EM4095, you can also boost or reduce the Antenna current by changing the value of the resistance R1. For example, if you decide to reduce the R1 value, you can increase the Reading and/or Writing distance. Caution: The Antenna current has to be lower than 200mA (EM4095 maximum AC peak current on ANT1 and ANT2 pads). For more information, please, contact [email protected] Internet email address. Copyright 2001, EM Microelectronic-Marin SA 17 www.emmicroelectronic.com AppNote 405 6.2 Development Kit EM4095 Circuit Diagram Copyright 2001, EM Microelectronic-Marin SA 18 www.emmicroelectronic.com AppNote 405 6.3 Development Kit EM4095 Board image Copyright 2001, EM Microelectronic-Marin SA 19 www.emmicroelectronic.com AppNote 405 6.4 Development Kit EM4095 top Layer Image 6.5 Development Kit EM4095 bottom layer image Copyright 2001, EM Microelectronic-Marin SA 20 www.emmicroelectronic.com AppNote 405 7 Appendix For further information see also: Datasheet EM4095 Read/Write analog front end for 125kHz RFID Basestation EM Microelectronic-Marin SA, Marin, 2000 Datasheet EM4170 Crypto Contactless Identification Device EM Microelectronic-Marin SA, Marin, 2001 Datasheet EM4150 Read / Write 1Kbit Identification Device EM Microelectronic-Marin SA, Marin, 2001 Datasheet EM 4056 Read / Write with Anticollision Identification Device EM Microelectronic-Marin SA, Marin, 2001 Datasheet EM4025 Read Only with Anticollision Identification Device EM Microelectronic-Marin SA, Marin, 2001 Datasheet EM 4102 Read Only 64 bit Identification Device EM Microelectronic-Marin SA, Marin, 2001 EM Microelectronic-Marin SA cannot assume responsibility for use of any circuitry described other than circuitry entirely embodied in an EM Microelectronic-Marin SA product. EM Microelectronic-Marin SA reserves the right to change the circuitry and specifications without notice at any time. You are strongly urged to ensure that the information given has not been superseded by a more up-to-date version. © EM Microelectronic-Marin SA, 09/02, Rev. B, Preliminary Copyright 2001, EM Microelectronic-Marin SA 21 www.emmicroelectronic.com
