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Datasheet - APD Anglia

1. Byte 0 Command 0x63 Byte 1 Parameter 1 Byte Null 0x00 Byte 2 Parameter2 1 Byte Null 0x00 Byte 3 Parameter3 1 Byte Null 0x00 Byte 4 Parameter4 1 Byte Null 0x00 Byte 5 Parameter5 1 Byte Null 0x00 Byte 6 Parameter 1 Byte Null 0x00 Byte 7 Checksum 0x63 Byte Checksum of Bytes 0 6 Response Token 0x70 InputO is logic O Ox71 InputO is logic 1 Example Command myArray 0x63 0x00 0x00 Ox00 0x00 0x00 0x00 0x63 SonMicro Electronics Table 26 Read Input Pin Command Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 45 3 5 I2C REFERENCE API define BYTE TRACK 0x01 define EM4100 0x02 define EM4100_DECODED 0x03 define BLK_1 0x01 define BLK_2 0x02 define BLK_3 0x03 define BLK_4 0x04 define BLK_5 0x05 define BLK_6 0x06 define BLK_7 0x07 BYTE myArray 8 BYTE token void get token void void read token void void read tag BYTE mode BYTE block no void wait until tag read void void Request Data void void Stop Read void void Reset void void Sleep void void Write Output Pins BYTE output states void Read Input Pin void void main unsigned int i I2CHW 1 EnableMstr I2CHW 1 EnableInt M8C EnableGInt While 1 get token asm nop read tag EM4100 DECODED BLK 2 get token asm nop Token should be 0x6B Slave is Reading Tag wait until tag
2. Ul SMI25 IC28 SOIC P2 1 UART TX P20 UART RX PI 1 DC SL P1 0 DC SDA P1 2 DREADY us 3 P1 5 WDATAO Required External Connection gt gt PI 6 WD P S P2 6 TAGF Optional Logic 1 Pulse will reset SM125 POO SREAD XRES OUIPUIO PQ 5 WC SLEEP PI 3 OUIPUTI P1 4 e x INPUIO P25 Optional Logic 1 Pulse will put SM125 into Sleep FREEP2 2 VDD FREEP2 4 GND FREEP 4 UART_RX Pin20 pin should not be left floating If it is not connected to max232 rs232 or external MCU pin then it should be connected to VCC with a pull up resistor i e 47K Figure 6 SM125 IC Reference Schematic 2 6 SM125 M1 232 Reference Schematic PC Connection Li VCC INPUIOP25 PO 5 OUIPUIO P2 6 TAGF POO SREAD P1 0 2C SDA PIH DC SL P1 2 DREADY P1 3 SLEEP P1 4 OUIPUTI P1 5 WOATAO P1 6 WDATAI If SM125 MI is used without st232 UART_RX Pin23 pin should not be left floating It can be connected to VCC with a pull up resistor i e 47K Figure 7 SM125 M1 232 Reference Schematic illustrating PC or RS232 connection If SM125 M1 is used SM125 Module without ST232 UART_RX pin should not be left floating It can be connected to max232 s1232 or to external MCU pin with pull up configuration else it needs to be connected to VCC with a pull up resistor SM125 Datasheet Firmware Version 3 0x 16 2 7 SM125 IC Packaging Information PIN 1 ID DIMENSIONS IN INCHESUMM MIN
3. 2AL7 rH REFERENCE JEDEC MO 119 0 300 7 621 PACKAGE WEIGHT 0 85gms PART STANDARD PKG Ho 5228 3 LEAD FREE PKG 0697112701 SEATING PLANE 0 713018 11 TAAAAAAAAAAHAHAH Dgece ad 0303 2 67 In 1 ZI oo4t0 10 L x 1 002110 231 eme L n anoecosos LA 00121317 0 01900 48 0 011810 301 51 85026 C Figure 8 SM125 IC 28 pin SOIC packaging information SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 17 2 8 SM125 M1 Packaging Information 3 ee EE Ee e Dimensions in mm andard Pin Header 0 9mm drill size Figure 9 SM125 M1 Module dimensions SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 18 3 COMMUNICATION PROTOCOL SM125 supports UART and I2C protocol Both protocols are built in the same firmware Command IDs are kept same for both communication interfaces but UART should be considered as the primary communication interface hence it supports more commands that is not necessary for DC communication e g calibration commands and is necessary for upgrading the module Please note that once Auto Read Mode is enabled SM125 can read tag automatically and output tag data without requiring any start read command Therefore it eliminates use of external microcontroller So far auto read mode has been used widely in indusiry When a tag enters into the RF field it s data is sent automatically thru UA
4. void Sleep f myArray 0 0x60 Sleep Command myArray 1 0 myArray 2 0 myArray 3 0 myArray 4 0 myArray 5 0 myArray 6 0 myArray 7 0x60 Checksum I2CHW 1 bWriteBytes 0x41 myArray 8 0 while I2CHW 1 bReadI2CStatus amp I2CHW WR COMPLETE I2CHW 1 ClrWrStatus SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 48 void Write Output Pins BYTE output states output_state output_state output_state output_state WN HO Outputl Logic Outputl Logic Outputl Logic Outputl Logic pq Output0 Logic Output0 Logic Output0 Logic Output0 Logic prp m myArray 0 0x62 myArray 1 output states myArray 2 0 myArray 3 0 myArray 4 0 myArray 5 0 myArray 6 0 myArray 7 myArray 0 myArray 1 Write Output Pins States of Output and Outputl Checksum I2CHW 1 bWriteBytes 0x41 myArray 8 0 while I2CHW 1 bReadI2CStatus amp I2CHW WR COMPLETE I2CHW 1 ClrWrStatus void Read Input Pin void f myArray 0 0x63 myArray 1 0 myArray 2 0 myArray 3 0 myArray 4 0 myArray 5 0 myArray 6 0 myArray 7 0x63 Read Input pin I2CHW 1 bWriteBytes 0x41 myArray 8 0 while I2CHW 1 bReadI2CStatus amp I2CHW WR COMPLETE I2CHW 1 ClrWrStatus use read token to get input pin state SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Vers
5. Table 29 Operating Temperature SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 50 4 4 ABSOLUTE MAXIMUM RATINGS Symbol Description Min Typ Max Units Notes TSTG Storage Temperature 55 100 C Higher storage temperatures will reduce data retention time TA Ambient Temperature 40 85 SE CC Supply Voltage 0 5 5 5 V IMIO Maximum Current into 25 50 mA any Port Pin ESD Electro Ststic Discharge 2000 V Human Body Model ESD Voltage Table 30 Absolute Maximum Ratings 4 5 PERFORMANCE SPECIFICATIONS Parameter Min Typ Max Units Notes Read Distance 8 12 cm Changes according to antenna size tag size and tag type Write Distance 2 4 8 cm Changes according to antenna size tag size and tag type Table 31 Performance Specifications SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 5 5 SALES AND SERVICE INFORMATION To obtain information about SonMicro Electronics products and technical support reference the following information SONMICRO SonMicro ELECTRONICS LTD Cankaya M Soguksu C Aslihan Ishani 2 15 Mersin 33070 TURKIYE Phone 90 324 237 21 28 Facsimile 90 324 237 21 86 Email info sonmicro com Web Site http www sonmicro com Sales http www sonmicro com sales ohp Support http www sonmicro com contact php Documents
6. Please note that a success response does not guarantee that the given data is written to the tag A success response guarantee that tag programming functions executed The tag might not be programmed with the given data User need to check manually by reading the tag Write distance tag shape size and type are important parameters that affect writing Command Command 0x23 1 Byte Block number to be programmed Please make sure you go over Tag Programming section in SM125 User Manual document before you program any block of the tag Incorrect writing may lock the tag and make it useless Block Number 0x00 Configuration Block 0x01 Block 1 Used for Byte Track 0x02 Block 2 Free Block 0x03 Block 3 Free Block 0x04 Block 4 Free Block 0x05 Block 5 Free Block 0x06 Block 6 Free Block 0x07 Block 7 Password Block or Free Block Data 4 Byte Data to be programmed to the tag Password 4 Byte Password Note that Password is the data stored in Block7 of the tag Table 11 Program Tag Write Tag with Password access Command Response Success OxFF 0x01 0x01 0x99 Ox9B Response may arrive with around 500ms delay Example Command Program Block2 with data 20 21 22 23 with password 10 20 30 40 TX gt FF 01 OA 23 02 20 21 22 23 10 20 30 40 56 RX gt Success FF 01 01 99 9B OxFF Header 0x01 Fixed OxOA Length of payload Data Command 0x23 Write with Password command 0x02 Block No Block 2 will be writt
7. Ox4E There will be next 5 byte data incoming master should read 5 byte more gt Read 5 Byte lt 4 byte transponder data F 0x46 This is the last sequence of 5byte data package There wont be new incoming 5 byte data next token will be Ox6A or Ox6B indicating SM125 read status SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 40 3 4 CMD STOP READ This command stops the Read operation The expected token is Ox6A just after command is sent indicating that Read is not active Byte 0 Command Ox12 Byte 1 Parameter1 1 Byte Null 0x00 Byte 2 Parameter2 1 Byte Null 0x00 Byte 3 Parameter3 1 Byte Null 0x00 Byte 4 Parameter4 1 Byte Null 0x00 Byte 5 Parameter5 1 Byte Null 0x00 Byte 6 Parameter 1 Byte Null 0x00 Byte 7 Checksum 1 Byte Checksum of Bytes 0 6 Ox12 Response Token Table 22 Stop Read Command Ox6A Read is not active Example Command myArray 0x12 0x00 0x00 0x00 0x00 OxOO 0x00 0x12 SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 4 3 4 3 CMD RESET This command resets SM125 device SM125 will immediately reset itself The expected token is Ox6A or Ox6B indicating the read status Because SM125 is initialized and make checksum of entire flash memory after reset or Power On Rese
8. SM125 chip and module comes from the factory with the firmware version that works at 5V Please note that 3 3V version will decrease read range performance Please note that SM125 M1 232 125 KHz RFID module comes with RS232 level converter supports 5V operation The ST232 IC used for RS232 level converter does not guarantee to work at 3 3V For 3 3V operation MAX3232 can be used for reliable operation SM125 MI 3232 SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 7 1 3 PART NUMBERING SM125 IC 125KHz RFID Chip 28 pin SOIC Previously called CY8C0104 SM125 M1 125 KHz RFID Module without RS232 level converter Previously called CY8CO105 N SM125 M1 232 125 KHz RFID module with RS232 level converter Supports 5V Previously called CY8CO105 SM125 M1 3232 125 KHz RFID Module with RS232 level converter Supports 3 3v No previous version SM125 EK D 125 KHz RFID Evaluation Kit Deluxe Version Previously called SM3005D SM125 EK L 125 KHz RFID Evaluation Kit Light Edition Previously called SM3005L 1 4 FIRMWARE VERSION NUMBERING V3 00 Version 3 The First version comes with SM125 Previous version called Build5 SP1 This document explains V3 0x firmware SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 8 1 5 WHAT IS NEW in SM125 V3 00 SM125 V3 0 Firmware is an improvement on old Build 5 SP1 firmware The new features collected for years an
9. 0 myArray 6 0 myArray 7 myArray 0 myArray 1 myArray 2 myArray 6 Checksum I2CHW 1 bWriteBytes 0x41 myArray 8 0 while I2CHW 1 bReadI2CStatus amp I2CHW WR COMPLETE I2CHW 1 ClrWrStatus void wait until tag read unsigned int i token 0 while token 0x6E read token asm nop 69 Put some delay so we do not continuously disturb the Slave A better option other than checking token continuously is to detect P1 2 logic high for i 0 i1 lt 50000 i asm nop SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 47 void Request Data Send R 0x52 to Request Data myArray 0 2 R I2CHW 1 bWriteBytes 0x41 myArray 1 0 while I2CHW 1 bReadI2CStatus amp I2CHW WR COMPLETE I2CHW 1 ClrWrStatus void Stop Read f myArray 0 0x12 Stop Read Command myArray 1 0 myArray 2 0 myArray 3 20 myArray 4 20 myArray 5 0 myArray 6 0 myArray 7 0x12 Checksum I2CHW 1 bWriteBytes 0x41 myArray 8 0 while I2CHW 1 bReadI2CStatus amp I2CHW WR COMPLETE I2CHW 1 ClrWrStatus void Reset f myArray 0 0x51 Reset Command myArray 1 0 myArray 2 0 myArray 3 0 myArray 4 0 myArray 5 0 myArray 6 0 myArray 7 0x51 Checksum I2CHW 1 bWriteBytes 0x41 myArray 8 0 while I2CHW 1 bReadI2CStatus amp I2CHW WR COMPLETE I2CHW 1 ClrWrStatus
10. KHz programmable clock frequency The antenna supplies energy to the tag Tag is energized and it modulates the magnetic field The modulated signal is passed on passive analog front end components and DC signal level is adjusted SM125 IC amplifies filters then demodulates the signal and converts it to digital The digitalized signals then get decoded and the actual tag data is captured The actual tag data is available to send to external peripheral over I2C bus UART Wiegand or GPIO output Alternatively the tag data can be processed furthermore inside the chip with custom specific applications e g printed on 2x16LCD SM125 IC is capable to program write to re writeable tags However 125 KHz RFID systems is not designed for data storage and mass writings Once the tag is programmed e g such as given IDs it is rarely written again in the field in real life For data storage and continuous and fast tag writing operations please investigate SonMicro s 13 56MHz RFID products SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 6 1 2 1 Supported Modulation and Tag Types SM125 IC supports Manchester modulation The supported tags are Atmel Temic T55xx Q5 T5551 15552 15554 15555 15557 and the industries most popular 125 KHz read only EM4102 tag from the EM Microelectronic SA The reading distance varies according to tag shape size and antenna size The practical read range is between 5 12
11. Reference Schematic 14 2 6 SM125 M1 232 Reference Schematic PC Connection 15 2 7 SM125 IC Packaging Information 16 2 8 SM125 M1 Packaging Information 17 3 COMMUNICATION PROTOCOL 18 3 1 UART SERIAL PROTOCOL STRUCTURE 19 3 1 1 Command Structure From Host to SM125 19 3 1 2 Response Structure for Commands From SM125 to Host 20 3 1 3 Response Structure upon Tag Read From SM125 to Host 21 3 2 UART COMMANDS 22 3 2 1 CMD_READ 22 3 2 2 CMD_STOP_READ 24 3 2 3 CMD_READ_WITH_PASS 25 3 2 4 CMD_WRITE 26 3 2 5 CMD_WRITE_WITH_PASS 27 3 2 6 CMD_SET_AUTO_MODE 28 3 2 7 CMD_RESET 30 3 2 8 CMD_SLEEP 31 3 2 9 CMD_WRITE_OUTPUT_PINS 32 3 2 10 CMD_READ_INPUT_PIN 33 3 3 DC PROTOCOL 34 3 3 1 I2C PIN CONNECTIONS IC and Module 34 SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 3 3 3 2 I2C PIN CONNECTIONS EVALUATION KITS 35 3 3 3 THEORY OF OPERATION amp TOKENS 36 3 4 2C COMMANDS 37 3 4 4 CMD READ 38 3 4 2 CMD STOP READ 40 3 4 3 CMD RESET 41 3 4 4 CMD SLEEP 42 3 4 5 CMD WRITE OUTPUT PINS 43 3 4 6 CMD READ INPUT PIN 44 3 5 12C REFERENCE API 45 4 ELECTRICAL amp PERFORMANCE SPECIFICATIONS 49 4 1 DC CHARACTERISTICS 49 4 2 GPIO CHARACTERISTICS 49 4 3 OPERATING TEMPERATURE 49 4 4 ABSOLUTE MAXIMUM RATINGS 50 4 5 PERFORMANCE SPECIFICATIONS 50 5 SALES AND SERVICE INFORMATION 51 SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 4 1 INTRODUCTION So
12. SM125 upgradeability feature enables Firmware customization remotely Because the main core is a System on Chip customization possibilities are endless For example in V3 0 firmware there are two outputs OutputO Output that can be controlled over UART or DC If the user is not going to use any standard pin e g I2C pins those pins can also be adjusted as output or input by firmware upgrades Another example is there are ADC resources which can be added to SM125 upon request 1 7 EVALUATION KIT amp SMRFID 3 x SOFTWARE SM125 EK D is a professional evaluation kit for SM125 M1 modules and SM125 system SM125 EK D evaluation kit can be used to develop your application quickly or it can simply demonstrate main features of the SM125 IC or SM125 M1 module SM125 EK can be also used as Tag Programmer Reader for 125 KHz T55xx tags Designers can develop or evaluate their own specific application with the kit Kit can be either connected to PC thru serial port or USB Serial converter or any other peripheral device thru UART or I2C interface SM125 EK provides PC connectivity I O pins I2C pins and 2x16LCD pins for SM125 M1 modules SMRFID 3 x Software makes easy to start with SM125 EK evaluation kit Software provides RS232 UART commands to control SM125 module chip and stand as a Tag programmer Reader SM125 EK evaluation kit communicates with PC by RS232 DB9 jack serial port at different baud rates from 9600bps to 115200bps 19200bps def
13. Track Mode Manchester RF 64 0x02 EM4102 Mode not decoded raw Manchester RF 64 Mode 0x03 EM4102 Mode Parity decoded Manchester RF 64 0x04 Byte Track Mode Manchester RF 32 Mode will be set to 0x03 automatically in the SM125 device if it is different than the above values 1 Byte Number of total blocks to be read Block Number For EM4102 Modes block number will be adjusted to 2 automatically in the SM125 device For Byte Track Mode this should be between 1 and 7 1 Byte Password Enable Disable Password Enable Disable 0x00 Password is not send 0x01 Password is sent approximately each second 4 Byte Password If the password is not going to be used random numbers can Password be ai e given Note that Password is the data stored in Block7 of the tag Table 12 Set Auto Read Mode Command Response Success OxFF OxO1 0x01 0x99 Ox9B SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 29 Example Command Enable Auto Read Mode EM4102 Decoded Mode No password TX gt Set Auto Mode FF 01 09 87 01 03 02 00 10 20 30 40 37 RX gt Success FF 01 01 99 9B OxFF Header 0x01 Fixed 0x09 Length of payload Data Command 0x87 Set Auto Mode Command 0x01 Auto Mode is enabled 0x03 Mode EM4102 parity decoded 0x02 Total block no to be read 0x00 Disable Password Ox10 1st password byte even it is not used Ox20 2nd password byte even it is not used 0x30 3 password byte even it is
14. WITH PASS This command starts reading operation for a password protected tag The password will be sent approximately each second to the tag automatically A tag that is not password protected will also be read Response indicating successful operation is expected immediately just after command is sent Please note that the password operation with 125 KHz tags is not common in the industry The password system on 125 KHz RFID tags are not very strong it is a slow process and it can reduce read range However the functionality is still preserved in the SM125 devices For high speed read write operations with strong authentication methods please investigate SonMicro s 13 56 MHz product line Command Command 0x13 1 Byte Mode or Type of Read 0x01 Byte Track Mode Manchester RF 64 0x02 EM4102 Mode not decoded raw Manchester RF 64 Mode Type 0x03 EM4102 Mode Parity decoded Manchester RF 64 0x04 Byte Track Mode Manchester RF 32 Mode will be set to 0x03 automatically in the SM125 device if it is different than the above values 1 Byte Number of total blocks to be read For EM4102 Mode block number will be adjusted to 2 Block Number automatically in the SM125 device For Byte Track Mode this should be between 1 and 7 Value greater than 7 blocks will be adjusted to 7 automatically in the SM125 device Password 4 Byte Password Note that password is the Block7 of the tag data T
15. a GPIO pin This pin is not connected to any pin on the SM125 M1 module 22 FREE P2 Free This pin has no function in V3 0 firmware Available for customization as a GPIO pin This pin is not connected to any pin on the SM125 M1 module 23 TAGF Pole Tag Found A LED connected to this pin will flash if a tag is in RF field Available for customization as a GPIO pin 24 SREAD PO O Read Status This pin indicates if RF field is On or Off Available for customization 25 REF Reference Voltage This pin outputs a 2 6V reference voltage for the analog front end 26 FREE Go Free This pin has no function in V3 0 firmware Available for customization as a GPIO pin This pin is not connected to any pin on the SM125 M1 module 27 AIS PO 6 Analog Input Signal Connected to analog front end 28 Vdd Supply Voltage 5V Input or 3 3V with appropriate firmware SonMicro Electronics Table 1 SM125 IC chip PinOut Table Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 12 2 3 SM125 M1 Module Pin Out View SM125 M1 and SM125 M1 232 comes as 28 pin 600 mil wide DIP package type It includes SM125 IC necessary passive components and RS232 driver IC optional SM125 M 1 232 at the bottom layer of the PCB 1 ADRV VDD 28 O 2 ouTPuTO NC 27 O zou VSS GND 26 QO Ri1N SREAD 25 51NPurO TAGF 24 6UART TX UART RX 23 O 7nc XRES 22 O 8SLeeP OUTPUT1 21 O ovss GND I2C SDA 20 1012c scL DREADY 19 Q 11 WDATAO WDATA1 18 12 vss G
16. be new incoming 5 byte data next token will be Ox6A or Ox 6B Summary of Read Operation 1 Write 8 byte frame for Read Command Ex 0x10 0x03 0x02 OxOO 0x00 0x00 OxOO 0x15 Ox10 is Read Command 0x03 is Mode EM4102 parity decoded mode 0x02 is number of blocks to be read 0x00 Null parameter Ox00 Null parameter 0x00 Null parameter 0x00 Null parameter 0x15 Checksum of the frame 0x10 0x03 0x02 0x00 0x00 2 ReadToken Expected token is Ox6B indicating that Read Operation is Active 3 Wait for Tag Read Wait for OX6E Token or detect card read if DREADY pin is Logic 1 When a tag is read SM125 will prepare Ox 6E token and make the DREADY pin High Master can continuously read token until it is Ox6E or interrupted with DREADY pin Note that for continuous read token operation repeat the loop with a small delay Putting some small delay will give time for SM125 to detect the card better 4 Request Data As soon as Ox6E token is read Slave will wait one byte R 0x52 from the Master After R is sent to Slave it will be possible to get tag data in the following steps 5 ReadTag Data Read 5 byte from the Slave After data is requested with R 0x52 Master need to read 5 byte from the slave The first 4 byte will be the tag data and the fifth byte is an indicator that informs master if there will be next 5 byte data needs to be read orif that was the final data sequence gt Read 5 Byte lt 4 byte transponder data N
17. fel jef w w D La u LJ Sa Jes JP6 c lC Ww o o LI 9 o sera pi 8 a n12 eli ka Tei ro 5 wet OP ffo e a Pas e J oa M CI e B Figure 10 SM125 DK SM4005 Evaluation Kit I2C Pins DC SCL E Qan Na RS LJ Ss RU Ae pb RI die Em Gleef isl 1 12 e 5 Aa e rare Ra oo Gas LIL Sur n GER e site P na LILI So E Gi TX Pin 1 E E s Sne GN0 RESET m ej dm e Bo ANTENNA M_SELECT Figure 11 SM3005 Evaluation Kit I2C Pins SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 3 3 3 THEORY OF OPERATION 8 TOKENS Anytime Master can read 1 byte status from the SM125 slave This status byte is called token Token indicates the current status of the SM125 device or it is the response of a command Note that SM125 I2C based on non interrupt model thus after a command is sent or data is ready the expected data or token needs to be read from the Master for reliable operation Token Token See Code Name Description This token indicates SM125 is busy and performing necessary action in response to a command This token can be captured if read_token is 0x88 Busy called immediately after a command is sent User can read token with a small delay to skip getting busy token Alternatively user can keep reading token until it is not 0x88 Ox6A Read is not If Read is not active this token will be captu
18. not be used by a MCU system Header Reserved Length Command Response CSUM 1 Byte 1 Byte 1 Byte 1 Byte N Bytes 1 Byte Table 6 UART frame send by SM125 1 Header This is a single byte that indicates the beginning of a frame This byte will be always OxFF Reserved This byte is reserved for future use and not implemented currently It is 0x01 Length This byte is used to indicate the length of the payload data Command This is the command for which the response is being sent back The host can use this byte to verify that the received response is for the command it sent 5 Response This contains the data which may be a byte that indicates a successful or faulty operation or the parameters requested 6 CSUM This is the checksum byte This is the sum of al bytes except the Header byte BON Commands other than the CMD FIRMWARE CMD READ CONFIG and CMD READ INPUT PIN have standard Successful Response i Success Response When a command is executed successfully the returning response from the SM125 device is OxFF 0x01 0x01 0x99 Ox9B 0x99 meaning success operations and the Ox9B is the checksum ii Firmware Version Response This response is expected when Read Firmware Version Command is executed Module will return firmware version in the Response area of the Response structure FF 01 09 50 56 31 2E 30 30 42 30 34 15 V 1 00B04 Firmware V 1 00B04 0x15 is the checksum iii Fir
19. not used Ox40 4 password byte even it is not used 0x37 Checksum SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 30 3 2 7 CMD RESET This command resets SM125 device There is no parameter required for this command Response indicating successful operation is expected immediately just after command is sent Please note that if a read is stopped by CMD STOP READ command and if Auto Read Mode is enabled after a reset automated read operation will start again Command Command 0x51 Table 13 Reset Command Response Success OxFF 0x01 0x01 0x99 Ox9B Example Command TX Reset FF 01 01 51 53 RX Success FF 01 01 99 9B OxFF Header Ox01 Fixed 0x01 Length of payload Data Command Here Data is zero byte in length Ox51 Reset Command 0x53 Checksum SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 31 3 2 8 CMD SLEEP This command sends sleep command to the device to save power Once module enters into sleep mode only external hardware reset or Power On Reset will wake up the SM125 device Command Command 0x60 Table 14 Sleep Command Response Success OxFF OxO1 0x01 0x99 Ox9B Example Command TX Sleep FF 01 01 60 62 RX Success FF 01 01 99 9B OxFF Header Ox01 Fixed 0x01 Length of payload Data Command Here Data is zero byte in length Ox60 Sleep Command 0x62 Checksum So
20. pull up resistor Available for customization as a GPIO pin or for LCD control 24 OUTPUT1 P1 4 OUTPUT1 This pin can be used as output and can source 20mA to target device It can be controlled by CMD WRITE OUPUT PINS command Available for customization as a GPIO pin or for LCD control 22 XRES External Reset A Logic 1 pulse will reset the SM125 This pin is connected with internal pull down resistor UART Receive RX This is UART RX receive of the SM125 IC CMOS Level 0 5V Do not connect to 23 UART_RX P2 0 Direct RS232 Default communication rate 19200 bps Baud Rate is available for customization If this pin is not used it should not be left floating It should be pulled up to VCC by a resistor i e 10K 47K 24 TAGE P2 6 Aou A LED connected to this pin will flash if a tag is in RF field Available for customization as a 25 SREAD PO O Read Status This pin indicates if RF field is On or Off Available for customization 26 GND vss Ground This pin is internally connected to pin9 12 and 26 of the module on PCB Any one of these pins should be connected to ground 27 NC No Connection Left this pin unconnected 28 Vad Supply Voltage 5V Input or 3 3V with appropriate firmware This pin is connected with pin28 of the module internally on the PCB Any one of these pin can be connected to 5V 3 3V SonMicro Electronics Table 2 SM125 M1 Module PinOut Table Revision A4 July 2008 2 5 SM125 IC Reference Schematic
21. read asm nop Token should be OxbE Slave is Ready to transmit Tag data Request Data Read Tag Data myArray 4 0 while myArray 4 F F Final means at myAray 4 there wont be next data sequence N Next means there will be next 5 byte data sequence needs to be read Read 5 byte First 4 byte is data the 5th byte is Next byte indicator I2CHW 1 fReadBytes 0x41 myArray 5 0 while I2CHW 1 bReadI2CStatus amp I2CHW RD COMPLETE I2CHW 1 ClrRdStatus asm nop Every loop you should see 4 byte in myArray 0 3 myArray 4 will be N or F asm nop get_token asm nop Token can be 0x6B If Auto Read mode is enabled or 0x6A Auto mode is disabled slave not reading tag SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 46 void get token BYTE i 0x88 means slave is busy So put some mini delay token 0x88 while token 0x88 Read until Slave is not busy read token if token 0x88 f Put some mini delay This is REQUIRED for i 0 1 lt 255 i asm nop void read token I2CHW 1 fReadBytes 0x41 myArray 1 0 while I2CHW 1 bReadI2CStatus amp I2CHW RD COMPLETE I2CHW 1 ClrRdStatus token myArray 0 void read_tag BYTE mode BYTE block_no myArray 0 0x10 Read Tag Command myArray 1 mode myArray 2 block no myArray 3 0 myArray 4 0 myArray 5
22. 0 pin Available for customization as a GPIO pin or for LCD 12 GND vss Ground This pin is internally connected to pin9 12 and 26 of the module on PCB Any one of these pins should be connected to ground 13 NC No Connection Left this pin unconnected IND2 Second end of the inductor antenna should be connected to this pin or pin15 of the module Pin15 14 IND2 and Pin14 of the module are connected internally on the PCB The other end of the antenna inductor should be connected to ADRV pin of the module IND2 Second end of the inductor antenna should be connected to this pin or pin15 of the module Pin15 15 IND2 and Pin14 of the module are connected internally on the PCB The other end of the antenna inductor should be connected to ADRV pin of the module 16 Vdd Supply Voltage 5V Input or 3 3V with appropriate firmware This pin is connected with pin28 of the module internally on the PCB Any one of these pin can be connected to 5V 3 3V d NC No Connection Left this pin unconnected 18 WDATA1 Paie pena DATA1 Wiegand 26 bit output Data pin Available for customization as a GPIO pin or for LCD DC Data Ready This pin can be connected to Master 12C device When a tag is read this pin will be logic 19 DREADY P1 2 high to let the Master know there is a tag data ready It is optional to use Available for customization as a GPIO pin or for LCD control 20 GC SDA Pi O DC SDA Data pin of I2C Master Data pin should be connected to this pin with 4 7K
23. ARE Gets firmware version 0x52 CMD SET BAUD Sets UART Baud Rate Ox55 CMD SET BYTE TRACK Sets Byte s to be tracked while reading Tag 0x70 CMD READ CONFIG Get configuration parameters of SM125 0x88 CMD SET OUTPUT TYPE Determines Output Types Ox90 CMD SET DC Sets DC slave address or enable disable DC Table 4 SM125 Configuration Commands SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 19 3 1 UART SERIAL PROTOCOL STRUCTURE The communication between the host and the module can take place at 9600bps 19200bps 38400bps 57600bps or 115200bps N 8 1 Module communicates at 19200bps N 8 1 as default Once the baud rate is changed using the CMD SET BAUD command successful communication will only occur with the new baud rate The host first sends the command and the module executes the operation and replies with a response to the command The host can analyze the reply to check if the operation was successful or if any error occurred during the operation Unlike the old generation firmware BUILD 5SP1 in this new firmware V3 0 or later the Command Response structure is based on interrupt model and it is possible to send any command at any time 3 1 1 Command Structure From Host to SM125 Following is the UART frame for the commands sent by the host 1 Byte 1 Byte 1 Byte 1 Byte N Bytes 1 Byte Header Reserved Length Command Data CSUM Table 5 UART fram
24. Address for I2C Write If the I2C Master device supports 7 bit addressing then there is no need to make shift operations The pull up resistors are not included in the evaluation kit When connecting Master MCU to SM125 pull up resistors can be between 1K ohm 4 7K ohm needs to be connected 3 3 1 12C PIN CONNECTIONS IC and Module SM125 IC SM125 M1 h I Pin Pin Pin Name Description 15 20 I2C SDA I2C Data Pin Make sure pull up resistor is connected to this pin i e 4 7K 13 10 I2C_SCL I2C Clock Pin Make sure pull up resistor is connected to this pin i e 4 7K Data Ready Pin This pin is optional to use It will be logic 1 when tag data is 16 19 DREADY ready Master can wait or interrupted when this pin goes high Alternatively if Optional this pin is not used Master can read and check token 0x6E in the software continuously if tag is read and data ready 19 22 ARES Reset Pin This pin is optional to use to reset SM125 Optional D i 14 9 12 or 26 GND Ground Master and Slave should have the same ground Table 17 12C Pins SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 35 3 3 2 12C PIN CONNECTIONS EVALUATION KITS I2C SCL P1 1 DREADY GND I2C SDA P1 0 oe Leo a voo n 191 C dii L TI NG M Jes iw z iM d PI d 3 d e we Me LI LU LJ sm4oos H pi LJ r1 r3 128 KHz e C i LT TE Lj RFIO DEU KIT e Uma r1 H ll
25. D Programmable for customer applications or controllable via I2C or UART Figure 1 Comparison of RFID Chips with SM125 IC chip SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 5 1 2 FUNCTIONAL OVERVIEW The following diagram illustrates SM125 IC internal blocks SM125 IC is a programmed System on Chip with SonMicro s intellectual property SM125 IC System on Chip Antenna J i Reference Voltage ADCs PWMs Generator UART e 2x16 LCD Interface Hardware Driver I2C e Spare GPIO rocessing I nterface Firmware Pins SPI Upgrade able Firmware Figure 2 SM125 IC System on Chip Architecture SPI Interface is available on chip but not implemented in firmware V3 0 2x16 LCD Driver is available on chip but not implemented in firmware V3 0 ADC is available on chip but not implemented in firmware V3 0 The SM125 IC design eliminates using external amplifiers filters antenna driver and even microcontroller Approximately 6K flash memory is free for custom specific applications Unlike the former SonMicro RFID chip CY8CO104 the SM125 IC programmability is not left to user SonMicro is able to provide upgrade for custom applications that have a volume potential For different kind of standard applications please check our support pages for new firmware versions SonMicro intends to release application specific firmware and reference designs continuously SM125 IC drives the antenna with a 125
26. ND NC 17 O 13 Nc VDD 16 14 IND2 IND2 15 O O O O O O O O O O O O O O Figure 5 SM125 M1 SM125 M1 232 Module PinOut View SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 13 2 4 SM125 Module Pin Out Table Pin Pin Name Description Antenna Driver Pin Inductor Antenna one end should be connected to this pin This pin is connected 1 ADRV internally with ARVO 3 pins of SM125 IC on module PCB The other end of the inductor should be connected to IND2 This pin drives antenna with 125KHz square wave 50 duty cycle Output 0 If General purpose output is enabled this pin will be logic high after a successful tag read for a 2 OUTPUTO P015 determined period It can be used to trigger relay circuit or drive buzzer This pin can also be controlled with CMD WRITE OUTPUT PINS command It can source 20mA to target device Available for customization as a GPIO pin or for LCD control RS232 TX 12V This pin is connected to MAX232 ST232 driver IC T1OUT is pin 14 of Max232 ST232 IC This pin is used to connect RS232 device such as PC serial port User can connect this pin to RX pin of 3 T1OUT RS232 device For PC pin2 of DB9 connector DO NOT CONNECT TTL CMOS 0 5V signals to this pin otherwise the peripheral microcontroller unit will get damaged To connect TTL CMOS level device use UART TX pin R
27. RT RS232 or Wiegand interface to the Host Terminal PC or MCU then the host processes the tag data and performs necessary action UART baud rate can be set to 9600 19200 default 38400 57600 and 115200bps I2C operation is supported at standard 100 KHz and fast 400 KHz rates The slave address Of SM125 can be set with SMRFID software over UART protocol The bold colored command code in the following table indicates those commands are also supported in I2C protocol Code Command Description 0x10 CMD READ Starts the Read Operation and looks for tag until it finds 0x12 CMD STOP READ Stops Reading OxI3 CMD READ WITH PASS Starts Read Operation for password protected Tag Ox20 CMD WRITE Write data to the Tag Ox23 CMD WRITE WITH PASS Write data to the password protected Tag 0x51 CMD RESET Resets SM125 0x60 CMD SLEEP Puts SM125 in Sleep mode to save power 0x62 CMD WRITE OUTPUT PINS Sets Output state as Logic 1 or O 0x63 CMD READ INPUT PIN Read INPUTI state as logic 1 or 0 0x87 CMD SET AUTO MODE Determine Auto Mode behavior Table 3 SM125 Practical Commands The configuration can be done quickly with SMRFID The following configuration commands may not be necessary to use with a MCU Code Command Description 0x40 CMD SET PROG PARAM Sets parameters for Tag programming 0x41 CMD SET RADF Sets Antenna Drive frequency Ox50 CMD FIRMW
28. S232 RX 12V This pin is connected to MAX232 ST232 driver IC R1IN is pin 13 of Max232 ST232 IC This pin is used to connect RS232 device such as PC serial port User can connect this pin to TX pin of 4 R1IN RS232 device For PC pin3 of DB9 connector DO NOT CONNECT TTL CMOS 0 5V signals to this pin otherwise SM125 IC will get damaged with 12V To connect TTL CMOS level device use UART RX pin INPUTO This pin can be used as input to read logic state of available signal Available for customization 5 INPUTO P2 5 UTO This pin c u inpu gi vai ig vai u izati Reference Read Input Command UART Transmit TX This is UART TX transmit of the SM125 IC CMOS Level 0 5V Do not connect to 6 UART TX P2 1 Direct RS232 Default communication rate 19200 bps Baud Rate is available for customization To connect RS232 device use R1IN pin T NC No Connection Left this pin unconnected 8 SLEEP P1 3 SLEEP A Logic 1 pulse into this pin will put SM125 to sleep External reset is required to wake up from Sleep Available for customization as a GPIO pin or for LCD control 9 GND vss Ground This pin is internally connected to pin9 12 and 26 of the module on PCB Any one of these pins should be connected to ground 10 IPC SCL P1H DC SCL Clock pin of I2C Master clock should be connected to this pin with a 4 7K pull up resistor 1 Available for customization as a GPIO pin or for LCD control 11 WDATAO P1 5 ming DATAO Wiegand 26 bit output Data
29. SM125 SM125 IC 125 KHz RFID Chip SM125 M1 125 KHz RFID Module ONMicro Firmware V3 0 DATA SHEET Single Chip including microcontroller RF circuit and Antenna Driver results in World s lowest count and smallest RFID Reader Available as IC Integrated Circuit or Module Requires only antenna and power supply to function Automatically demodulate and decode RF signal and make the actual tag data ready No need to know about complicated RFID subject Supports Atmel Temic T55xx and EM4102 Unique tags Supports Manchester RF 64 Manchester RF 32 modulation 5V or3 3V Operation Sleep Operation UART Interface up to 115200bps I2C Interface up to 400 KHz Custom defined General Purpose I O Supports Wiegand 26 Bit output Firmware Upgradeable for customer specific applications SonMicro Electronics Revision A 4 July 2008 SM125 Datasheet Firmware Version 3 0x 2 1 INTRODUCTION 4 1 1 COMPETITOR COMPARISION 4 1 2 FUNCTIONAL OVERVIEW 5 1 2 1 Supported Modulation and Tag Types 6 1 2 2 Upgrading Built In Bootloader 6 1 2 3 Operating Voltage 5V 3 3V 6 1 3 PART NUMBERING 7 1 4 FIRMWARE VERSION NUMBERING 7 1 5 WHAT IS NEW in SM125 V3 00 8 1 6 CUSTOMIZATION 9 1 7 EVALUATION KIT amp SMRFID 3 x SOFTWARE 9 2 HARDWARE INFORMATION 10 2 1 SM125 IC Pin Out View 10 2 2 SM125 IC Chip Pin Out Table 11 2 3 SM125 M1 Module Pin Out View 12 2 4 SM125 Module Pin Out Table 13 2 5 SM125 IC
30. aa Paes Description 0x10 CMD_READ Starts a Read Operation 0x12 CMD_READ_STOP Stops Read Operation 0x51 CMD_RESET Resets SM125 0x60 CMD SLEEP SU a SLEEP External reset is required to wake 0x62 CMD_WRITE_OUTPUT_PINS Changes state of Output0 and Output1 pins 0x63 CMD READ INPUT PIN Reads state of Input0 pin Table 19 Summary of Commands All commands send as 8 byte data frame including the command code and checksum as follows Byte 0 Byte 1 Byte 2 i Byte 6 Byte 7 Command Parameter Paramater2 Parameter Checksum 1 Byte 1 Byte 1 Byte ii 1 Byte 1 Byte Table 20 DC Command Frame Even some commands does not require any parameter i e CMD RESET the frame should still be 8 byte in length including null parameter bytes SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 38 3 4 1 CMD READ This command initiates Read operation in SM125 device Expected token is Ox6B just after command is sent After Read operation is started Master can wait DREADY pin goes high or alternatively continuously check if token is Ox6E Data Ready Token If the second method is used it isa good practice to put some mini delay for each read token attempt to not interrupt the SM125 continuously for a successful read operation Byte 0 Command 0x10 1 Byte Mode Type of Read 0x01 Byte Track Mode Manchester RF 64 0x02 EM4102 Mode not decoded raw Manchest
31. able 9 Read with Password Command Response SUCCESS OxFF 0x01 0x01 0x99 Ox9B Example Command TX gt Read Tag w pass FF 01 07 13 01 02 10 20 30 40 BE RX gt Success FF 01 01 99 9B OxFF Header Ox01 Fixed 0x07 Length of payload Data Command 0x13 Read with password command 0x01 Mode Byte Track mode Manchester RF 64 is used 0x02 Block No 2 block will be read 8 byte 0x10 Is password byte 0x20 2nd password byte 0x30 3 d password byte Ox40 4th password byte OxBE Checksum SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 26 3 2 4 CMD WRITE This command writes programs given data to supported re writeable tags Supported re writeable tags have 4 byte in each block 4 byte data can be written to allowed tag blocks Response indicating successful operation is expected just after programming of tag is done Unlike the other commands responses the expected success response can take longer 500ms to get The CMD WRITE function supports Q5 T5555 T5557 and other re writeable T55xx tags Please note that a success response does not guarantee that the given data is written to the tag A success response guarantee that tag programming functions executed The tag might not be programmed with the given data User need to check manually by reading the tag Write distance tag shape size and type are important parameters that affect writing Comman
32. amp Software http www sonmicro com 125n d125 ph User Forums http www sonmicro com forums SonMicro Electronics Revision A4 July 2008
33. ault For a very quick and painless start we recommend you to buy a low cost SM125 EK Evaluation kit For latest Documentation amp Software http www sonmicro com 125n d125 ph For Online Store http www sonmicro com shop shop4 php Figure 3 SM125 EK D Evaluation Kit Photo SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 2 HARDWARE INFORMATION SonMicro provides module and chip for 125 KHz RFID applications 2 1 SM125 IC Pin Out View SM125 IC comes as 28 pin SOIC package and is ROHS compliant The system on chip used isa Cypress PSoC device SonMicro Electronics 1 ADRVO 2 OUTPUTO 3 RSRVO 4 RSRVO 5 ADRV1 6 INPUTO 7 ADRV2 8 UART TX 9 NC 10 ADRV3 11 WDATAO 12 SLEEP 13 I2C SCL 14 VSS GND FREE 26 REF 25 SREAD 24 TAGF 23 FREE 22 FREE 21 UART RX 20 XRES 19 WDATA1 18 OUTPUT1 17 DREADY 16 I2C SDA 15 Figure 4 SM125 IC chip PinOut View Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 11 2 2 SM125 IC Chip Pin Out Table Pin Pin Name Description Antenna Driver Pin When the RFID chip tries to read the transponder a 125 kHz square wave with a 5096 1 ADRVO POQ 7 duty cycle is output on this pin as well as at ADRV1 ADRV2 and ADRV3 pins to drive the antenna These pins should be connected together externally to drive th
34. centimeters 2 5 Typical read range is 8cm 3 The EM4100 02 tags have a header consist of 9 1s 11111111 1xxxxxx the SMI25 IC can trace these ones and then start decoding operation In re writeable T55xx tags there is no fixed header 1 to 4 byte of any tag block needs to be written a known value and so the SM125 IC can trace and look for this header Once header is captured SM125 IC will synchronize and get the actual tag data In default SM125 IC traces 4 byte data 0x52 0x58 Ox8B 0x45 For more information please investigate SM125 System User Manual that gives brief information about 125 KHz RFID system and the evaluation kit and software tools 1 2 2 Upgrading Built In Bootloader SM125 IC has a bootloader code allowing firmware upgrades Upgrading is done with the provided software tools over UART Serial port A complete upgrade of SM125 IC with UART is completed just in 10 seconds It is strongly recommended user include UART RS232 TX RX pins on the product PCB to enable on board upgrading for modifications or firmware improvements There is a SM125 compatibility upgrade package that upgrades existing old modules and chips having Build 5 SP1 firmware Please request information at support 9sonmicro com to upgrade existing modules and chip for new generation firmware 1 2 3 Operating Voltage 5V 3 3V SM125 IC can be operated at 5V or 3 3V However both operating voltages requires different firmware version
35. connected to this pin with a 4 7K pull up resistor Available for customization as a GPIO pin or for LCD control 14 GND VSS Ground Connection This pin should be connected to GND 15 GC SDA Pi O DC SDA Data pin of I2C Master Data pin should be connected to this pin with 4 7K pull up resistor Available for customization as a GPIO pin or for LCD control DC Data Ready This pin can be connected to Master 12C device When a tag is read this pin will be logic 16 DREADY P1 2 high to let the Master know there is a tag data ready It is optional to use Available for customization as a GPIO pin or for LCD control 17 OUTRUTA P114 OUTPUT1 This pin can be used as output and can source 20mA to target device It can be controlled by CMD WRITE OUPUT PINS command Available for customization as a GPIO pin or for LCD control 18 WDATA1 P1 6 M DATA1 Wiegand 26 bit output Data pin Available for customization as a GPIO pin or for LCD 19 XRES External Reset A Logic 1 pulse will reset the SM125 This pin is connected with internal pull down resistor UART Receive RX This is UART RX receive of the SM125 IC CMOS Level 0 5V Do not connect to 20 UART RX P2 0 Direct RS232 Default communication rate 19200 bps Baud Rate is available for customization If this pin is not used it should not be left floating It should be pulled up to VCC by a resistor i e 10K 47K 21 FREE P22 Free This pin has no function in V3 0 firmware Available for customization as
36. d Command 0x20 1 Byte Block number to be programmed Please make sure you go over Tag Programming section in SM125 User Manual document before you program any block of the tag Incorrect writing may lock the tag and make it useless Ox00 Configuration Block EEN 0x01 Block 1 Used for Byte Track 0x02 Block 2 Free Block 0x03 Block 3 Free Block 0x04 Block 4 Free Block 0x05 Block 5 Free Block 0x06 Block 6 Free Block 0x07 Block 7 Password Block or Free Block Data 4 Byte Data to be programmed to the tag Table 10 Program Tag Write Tag Command Response Success OxFF Ox01 0x01 0x99 Ox9B Response may arrive with around 500ms delay Example Command TX gt FF 01 06 20022021 2223 AF Program Block2 with data 20 21 22 23 RX Success FF 01 01 99 9B OxFF Header 0x01 Fixed 0x06 Length of payload Data Command Ox20 Write Tag command 0x02 Block No Block 2 will be written Ox20 1st byte to be programmed 0x21 2nd byte to be programmed 0x22 3rd byte to be programmed 0x23 4ih byte to be programmed OxAF Checksum SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 27 3 2 5 CMD WRITE WITH PASS This command is another version of CMD WRITE command It writes programs given data to supported re writeable tags with a password First password is sent then programming is performed Unlike the other commands responses the expected success response can take longer 500ms to get
37. d implemented upon customer standard and most wanted requirements Bootloader embedded for easy upgrading This result in faster custom programming and better support User Programming feature is removed to imply our product have ease of use New UART communication protocol implemented with header and command frames Read range is improved 1 2 centimeters Software and Hardware Sleep operation features are added Software Reset command is added Stop Read command is added Get Configuration command is added Change Baud rate command is added 12C Slave address change feature is added 12C and UART embedded in the same firmware no need for extra upgrading packs Auto Read mode is improved Users can select easily which tag type which modulation will be used in Auto Read mode Mode Select is removed Module can be accessed over UART or I2C bus any time Interrupt model UART communication protocol implemented Module can run commands without waiting response of a previous command Wiegand 26 bit output feature with flexible settings is added Automatic GPIO pin trigger feature is added after tag is read UART ASCII or HEX output options with CR LF footers are added SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 9 1 6 CUSTOMIZATION SM125 firmware and hardware is customizable according to user needs For customization service please contact us at support sonmicro com
38. ded Popular 125 KHz Read Type 0x02 Block No 0x18 Checksum SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 23 Whenever a valid tag here it is EM4102 tag enters into RF field another response will be sent from SM125 See Section 3 1 3 Example Command Byte Track Method TX gt Read Tag FF 01 03 1001 07 1C RX gt Success FF 01 01 99 9B OxFF Header 0x01 Fixed 0x03 Length of payload Data Command 0x10 Read Command 0x01 Mode Byte Byte Track will be used 0x52 0x58 Ox8B 0x45 will be traced as default 0x07 Block No to be read Ox1C Checksum Whenever a valid tag enters into RF field another response will be sent from SM125 See Section 3 1 3 SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 24 3 2 2 CMD STOP READ This command stops reading operation There is no parameter required for this command Response indicating successful operation is expected immediately just after command is sent Command Command 0x12 Table 8 Stop Read Command Response Success OxFF OxO1 0x01 0x99 Ox9B Example Command TX Stop Read FF 01 01 12 14 RX Success FF 01 01 99 9B OxFF Header Ox01 Fixed 0x01 Length of payload Data Command Here Data is zero byte in length Ox12 Stop Read Command Ox14 Checksum SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 25 3 2 3 CMD READ
39. e RX gt FFO1 06 10 FF FE FD FC FB 08 OxFF Fixed Header Ox01 Fixed Byte 0x06 Length of payload data Ox10 indicates a tag data OxFF Ist byte of tag data OxFE 2nd byte of tag Data OxFD 3rd byte of tag data OxFC 4th byte of tag data OxFB 5th byte of tag data 0x08 Checksum RX gt FF O 09 10 52 58 8B 45 01 01 01 01 98 OxFF Fixed Header Ox01 Fixed Byte 0x09 Length of payload data Ox10 indicates a tag data 0x52 Ist byte of tag data 0x58 2nd byte of tag Data Ox8B 3rd byte of tag data 0x45 4th byte of tag data 0x01 Sth byte of tag data 0x01 Sth byte of tag data 0x01 Sth byte of tag data 0x01 Sth byte of tag data 0x98 Checksum ii ASCII Mode In this mode tag data is passed to the host as converted to ASCII characters CR and LF can be added to the end of data with CMD_OUTPUT_TYPE command Incoming ASCII Characters gt FFFEFDFCFB SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 22 3 2 UART COMMANDS SM125 can be controlled over UART Serial I2C or there is no necessary for a control mechanism once the Auto Read Mode is setup In Auto Mode SM125 runs automatically continuously seek for tag and does not require any command to start read operation When a tag is read it can output thru UART Wiegand or DC Alternatively SM125 can be controlled by commands explained below 3 2 1 CMD READ This command starts standard read operation in SM125 The command requires two parame
40. e Command TX gt Read InputO FF 01 01 63 65 RX gt InputO is Logic 1 FF 01 01 99 9B TX Read InputO FF 01 01 63 65 RX InputO is Logic O FF 01 01 66 68 OxFF Header Ox01 Fixed 0x01 Length of payload Data Command Ox63 Read InputO pin 0x65 Checksum SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 34 3 3 12C PROTOCOL SM125 supports DC communication up to 400 KHz in addition to UART Serial interface Both communication interfaces are found in the same firmware SM125 acts as a slave device and can be controlled by external MCU The slave address default 0x41 or 65 decimal can be changed or I2C communication can be disabled in SMRFID software UART will still be active even I2C interface is enabled Please note that DC Interface needs to be enabled by SMRFID software To check if it is enabled or not and see the slave address use SMRFID gt Tools gt Get SM125 Configuration If it is disabled you can enable or change slave address at SMRFID gt Settings gt I2C Settings window SM125 uses 7 bit addressing for the DC When accessing from 8 bit addressed I2C device the slave address needs to be shifted one byte left and the LSB bit determines read write as follows Example If I2C address is 0x41 0x41 gt 0x83 Slave Address for I2C Read 0x41 gt 0x82 Slave Address for I2C Write Example if I2C Slave Address is 0x42 0x42 gt 0x85 Slave Address for I2C Read 0x42 gt 0x84 Slave
41. e antenna with more current Output 0 If General purpose output is enabled this pin will be logic high after a successful tag read for a 2 OUTPUTO PO 5 determined period It can be used to trigger relay circuit or drive buzzer This pin can also be controlled with CMD WRITE OUTPUT PINS command It can source 20mA to target device Available for customization as a GPIO pin or for LCD control RSRVO PO Reserved 0 Should be connected externally to pin 4 RSRVO Pol Reserved 0 Should be connected externally to pin 3 5 ADRV1 P2 7 Antenna Drive Pin See Pin 1 description INPUTO This pin can be used as input to read logic state of available signal Available for customization 6 INPUTO P2 5 Reference Read Input Command 7f ADRV2 P2 3 Antenna Drive Pin See Pin 1 description 8 UART TX Pan UART Transmit TX This is UART TX transmit of the SM125 IC CMOS Level 0 5V Do not connect to Direct RS232 Default communication rate 19200 bps Baud Rate is available for customization NC SMP NC No Connection This pin should be left unconnected 10 ADRV3 P1 7 Antenna Drive Pin See Pin 1 description 11 WDATAO bas nd DATAO Wiegand 26 bit output Data0 pin Available for customization as a GPIO pin or for LCD 12 SLEEP P1 3 SLEEP A Logic 1 pulse into this pin will put SM125 to sleep External reset is required to wake up from Sleep Available for customization as a GPIO pin or for LCD control 43 GC SCL Pn DC SCL Clock pin of DC Master clock should be
42. e send by Host 1 Header This is a single byte that indicates the beginning of a frame This byte should be always OxFF 2 Reserved This byte is reserved for future use and not implemented currently It needs to be always 0x01 3 Length This byte is used to indicate the length of the payload data This includes the Command and the Data bytes 4 Command This byte is used to instruct the module on what operation to perform 5 Data These are parameters necessary for the module to execute the command For example for a Read command the data will be the modulation type to be read For a Write command this will be the block number and block data to be written to the tag 6 CSUM This is the checksum byte This byte is used on the host as well as the module to check the validity of the packet and to trap any data corruption This is calculated by adding all the bytes in the packet except the Header byte OxFF SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 20 3 1 2 Response Structure for Commands From SM125 to Host Following is the UART frame for the response packets sent by SM125 module in response to the commands For most of the commands that does not require parameter from SM125 there is only one response indicating the command is executed successfully For a few commands mentioned below the response comes with the parameters requested and these commands are configuration commands which may
43. en 0x20 1s byte to be programmed Ox21 2nd byte to be programmed 0x22 3 d byte to be programmed 0x23 4ih byte to be programmed 0x10 1st password byte 0x20 2nd password byte 0x30 3 password byte 0x40 4th password byte 0x56 Checksum SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 28 3 2 6 CMD SET AUTO MODE This command enables or disables Auto Read Mode and determines the necessary parameters to be used in Auto Read Mode The parameters define the Mode Read Modulation type to be used number of blocks to be read and if it is necessary or not to send password Auto Read Mode brings advantage to user so that external control of SM125 may not be required Once Auto Read mode command is executed the parameters are stored in non volatile memory of the SM125 device Therefore it can reliably be used in the field without need of external microcontroller to initiate read operations Similar command CMD_SET_OUTPUT_TYPE can be used to adjust the output type permanently User can select UART ASCII output GPIO output or Wiegand output etc Please note that users can use SMRFID software to configure SM125 module thus there might be no need for detailed investigation of this command Command Command 0x87 1 Byte Auto Mode Enable Disable Auto Mode Enable Disable 0x00 Disables Auto Read Mode 0x01 Enables Auto Read Mode 1 Byte Mode or Type of Read 0x01 Byte
44. er RF 64 0x03 EM4102 Mode Parity decoded Manchester RF 64 0x04 Byte Track Mode Manchester RF 32 Byte 1 Parameter 1 Byte Number of total blocks to be read For EM4102 Modes block number will be adjusted to 2 SE automatically in the SM125 device For Byte Track Mode this should be between 1 and 7 Byte 3 Parameter3 1 Byte Null 0x00 Byte 4 Parameter4 1 Byte Null 0x00 Byte 5 Parameter5 1 Byte Null 0x00 Byte 6 Parameter 1 Byte Null 0x00 Byte 7 Checksum 1 Byte Checksum of Bytes 0 6 Table 21 Read Command Response Token Ox6B Read is Active For the next token we can expect Ox6E if a tag is read Example Command EM4102 Parity Decoded 2 Blocks to be read myArray 0x10 0x03 0x02 Ox00 Ox00 OxOO Ox00 0x15 SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 39 As soon as Ox6B token is captured Master can wait for Ox6E token or wait for DREADY pin to goes high When Ox6E token is read Master should send write 1 byte data R 0x52 to Request tag data Data will be received with 5 byte packages the fifth byte indicates if there will be N ext data or that is the Final sequence 4 byte transponder data N Ox4E There will be next 5 byte data incoming master should read 5 byte more 4 byte transponder data F 0x46 This is the last sequence of 5byte data package There wont
45. ion 3 0x 49 4 ELECTRICAL amp PERFORMANCE SPECIFICATIONS 4 1 DC CHARACTERISTICS Symbol Description Min Typ Max Units Notes Vdd Supply Voltage 4 75 5 00 5 5 V Vdd Supply Voltage 3 02 3 3 5 5 V 3V requires appropriate firmware upgrade Read performance will decrease with 3 3V lo Supply Current 45 mA Read Active lo Supply Current 20 mA Read is not Active Is Sleep Current 10 15 20 UA Sleep Mode Table 27 DC Characteristics 4 2 GPIO CHARACTERISTICS Symbol Description Min Typ Max Units Notes Reu Pull up Resistor 4 5 6 8 kQ Rep Pull Down Resistor 4 5 6 8 kQ Vou High Output Level Vdd 1 0 V IOH 10 mA Vdd 4 75 to 5 25 8 lO switching 4 per side VoL Low Output Level 0 75 V IOH 25 mA Vdd 4 75 to 5 25 8 lO switching 4 per side Vit Input Low Level 0 8 V Vdd 4 75 to 5 25 Vin Input High Level 2 1 V Vdd 4 75 to 5 25 Vu Input Hysterisis 60 mV lu Input Leakage Absolute 1 nA Gross tested to 1 mA Value Cin Capacitive Load on Pins as 3 5 10 pF Package and pin dependent Temp Input 25 C Cour Capacitive Load on Pins as 3 5 10 pF Package and pin dependent Temp Output 25 C Table 28 GPIO Pin charecteristics 4 3 OPERATING TEMPERATURE Symbol Description Min Typ Max Units Notes TA Ambient Temperature 40 85 C TJ Junction Temperature 40 100 C
46. mware Version Response This response is expected when Get Configuration command is executed Module will return configuration parameters in the Response area of the Response structure Note that total incoming data for this command will be 68 bytes in length SMRFID will convert parameters meaning automatically FF 01 41 70 AO C8 AO 28 60 60 01 08 08 02 03 03 03 03 00 NO 00 00 00 00 00 00 00 01 01 02 86 00 00 01 02 1E 04 52 58 8B 45 00 41 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 56 31 2E 30 30 42 30 34 00 E6 OxE6 is the checksum SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 21 3 1 3 Response Structure upon Tag Read From SM125 to Host SM125 can send UART data to Host in two cases One is in response to a command and the other is when a tag is read The above section explains response structure in response to commands and the following explains responses when a tag is read Different UART output types can be selected for SM125 module Output type can be set with CMD OUTPUT TYPE command or in SMRFID Settings Output Settings The UART output after a successful tag read can be set to protocol mode or ASCII mode or can be disabled i Protocol mode In this mode tag data is passed to host with the response structure explained in the previous section For example when a tag is read the following response is sent to Host if the protocol mode is selected for UART output typ
47. nMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 32 3 2 9 CMD WRITE OUTPUT PINS This command can write logic O or 1 to OutputO and Output pins OutputO and Output pins can source 20mA to target device in case of more current required an external transistor circuit needs to be used i e for driving a relay Command Command 0x62 1 Byte Output s State Binary Representation b XXXX XXYZ X Don t Care Y Output Y 0 Output is Logic O Y 1 Output is Logic 1 Output State Z Output0 Z 0 Output0 is Logic O Y 1 OutputO is Logic 1 0x00 Output1 0 Output0 gt 0 0x01 Output1 0 Output0 gt 1 0x02 Output12 1 Output030 0x03 Output12 1 Output0 gt 1 Table 15 Write Output Pins Command Response Success OxFF OxO1 OxO1 0x99 Ox9B Example Command EM4102 Parity Decoded TX gt Output1 1 OutputO gt 1 FF 01 02 62 03 68 RX Success FF 01 01 99 9B OxFF Header Ox01 Fixed 0x02 Length of payload Data Command 0x62 Write Output pins command 0x03 Outputs State Both outputs are logic 1 0x68 Checksum SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 33 3 2 10 CMD READ INPUT PIN This command will read logic state of InputO pin Command Command 0x63 Table 16 Read Input0 Command Response InputO is Logic 1 OxFF Ox01 0x01 0x99 Ox9B InputO is Logic O OxFF OxO1 OxO1 0x66 0x68 Exampl
48. nMicro Electronics manufactures and sells both Module SM125 M1 and IC SM125 IC for 125 KHz RFID applications SM125 M1 125 KHz RFID module is integrated with SM125 IC chip few passive components those are required to complete a reader and a RS232 signal level converter optional at the bottom layer of the PCB The main core SM125 IC chip is designed with Cypress Programmable System on Chip architecture over the years of experience and SonMicro s intellectual property SM125 IC formerly called CY8C0104 has been in the field for years proving the reliability and availability The Single Chip design integrated with RF circuit and microcontroller is only provided by SonMicro worldwide It reduces overall cost and speed up the product design dramatically 1 1 COMPETITOR COMPARISION Following is the comparison diagram of traditional RFID chips with SonMicro s SM125 IC mixed signal RFID chip SonMicro chip can be customized for the customer application Please contact us to discuss if your existing product can be done with our single chip solution Competitor Solution Old Fashion High Cost Long Design Time More than 20 passive components Competitors RFID Chip Microcontroller mm Users need to write complicated decode algorithms need to know RFID basics manage overall design SonMicro Solution Low Cost Ready to Go 9 passive components Single Chip including RFID Circuit and Microcontroller No need to know RFI
49. o Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 43 3 4 5 CMD WRITE OUTPUT PINS This command controls logic state of Output and OutputO pins The expected token is Ox6F indicating command is executed successfully Byte 0 Command 0x62 Byte 1 Parameter1 1 Byte Outputs State Binary Representation b XXXX XXYZ X Don t Care Y Output Y 0 Output is Logic O Y 1 Output is Logic 1 Z OutputO Z 0 Outputo is Logic O Y 1 OutputO is Logic 1 0x00 Output1 0 Output0 gt 0 0x01 Output1 0 Output0 gt 1 0x02 Output gt 1 Output0 gt 0 0x03 Output1 1 Output0 gt 1 Byte 2 Parameter2 1 Byte Null 0x00 Byte 3 Parameter3 1 Byte Null 0x00 Byte 4 Parameter4 1 Byte Null 0x00 Byte 5 Parameter5 1 Byte Null 0x00 Byte 6 Parameter 1 Byte Null 0x00 Byte 7 Checksum 1 Byte Checksum of Bytes 0 6 Response Token Ox6F Example Command Table 25 Write to Output Pins Command Output and OutputO is logic 1 myArray 0x62 0x03 0x00 0x00 Ox00 0x00 OxOO 0x65 SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 44 3 4 6 CMD READ INPUT PIN This command will read logic state of InputO pin If InputO is logic O then the expected token is 0x70 if InputO is logic 1 then the expected token is 0x71
50. red After Power On Reset if Active Auto Read mode is disabled this is the expected token Ox6B Read is If Read is active this token will be captured After Power On Reset if Auto Active Read mode is enabled this is the expected token 0x6C GE This token is captured if the send command frame has invalid checksum Invalid e 0x6D This token is captured if the command code is not valid Command This token is captured if a tag is read and is ready to be sent Users can poll Ox6E Data for this token continuously to understand if a tag is read Alternatively Ready DREADY P1 2 pin will goes high indicating that there is a tag read User need to read tag data otherwise SM125 will wait forever until tag data is read Ox6F OK This token Indicates for some commands that the operation is successful i e CMD_WRITE_OUTPUT_PINS 0x70 Input0 This token can be expected after CMD READ INPUT PIN command LogicO indicating that InputO pin has LogicO State Ox71 InputO This token can be expected after CMD READ INPUT PIN command Logic indicating that InputO pin has Logic1 State SonMicro Electronics Table 18 Summary of Tokens Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 3 4 12C COMMANDS Unlike the UART protocol there are only few commands that are essential for the I2C protocol The chosen commands target a practical application with I2C interface and simplify communication com m
51. t the expected token may arrive with some latency Byte 0 Command 0x51 Byte 1 Parameter1 1 Byte Null 0x00 Byte 2 Parameter2 1 Byte Null 0x00 Byte 3 Parameter3 1 Byte Null 0x00 Byte 4 Parameter4 1 Byte Null 0x00 Byte 5 Parameter5 1 Byte Null 0x00 Byte 6 Parameter 1 Byte Null 0x00 1 Byte Checksum of Bytes 0 6 Byte 7 Checksum 0x51 Table 23 Reset Command Response Token Ox6A or Ox6B Read is not active or Read is active Example Command myArray 0x51 0x00 0x00 Ox00 0x00 Ox00 OxOO 0x51 SonMicro Electronics Revision A4 July 2008 SM125 Datasheet Firmware Version 3 0x 42 3 4 4 CMD_SLEEP This command will put SM125 device to sleep mode DC communication will halt and only external reset can wake up the SM125 device from the sleep mode Byte 0 Command 0x60 Byte 1 Parameter1 1 Byte Null 0x00 Byte 2 Parameter2 1 Byte Null 0x00 Byte 3 Parameter3 1 Byte Null 0x00 Byte 4 Parameter4 1 Byte Null 0x00 Byte 5 Parameter5 1 Byte Null 0x00 Byte 6 Parameter 1 Byte Null 0x00 1 Byte Checksum of Bytes 0 6 Byte 7 Checksum Ox60 Table 24 Sleep Command Response Token 2C communication will halt until external hardware reset Example Command myArray 0x60 0x00 0x00 0x00 0x00 Ox00 0x00 0x60 SonMicr
52. ters One parameter is the Mode Read Type Modulation Type and the other is number of blocks to be read Response indicating successful operation is expected immediately just after command is sent If the UART output is enabled SM125 will send tag data as soon as the tag enters into the field See SMRFID Settings Output settings or CMD OUTPUT TYPE command For details of Read Modulation Type please investigate User Manual document to get better understanding of the 125 KHz System Command Command 0x10 1 Byte Mode or Type of Read 0x01 Byte Track Mode Manchester RF 64 0x02 EM4102 Mode not decoded raw Manchester RF 64 Mode Type 0x03 EM4102 Mode Parity decoded Manchester RF 64 0x04 Byte Track Mode Manchester RF 32 Mode will be set to 0x03 automatically in the SM125 device if it is different than the above values 1 Byte Number of total blocks to be read For EM4102 Mode block number will be adjusted to 2 Block Number automatically in the SM125 device For Byte Track Mode this should be between 1 and 7 Value greater than 7 blocks will be adjusted to 7 automatically in the SM125 device Table 7 Read Command Response Success OxFF 0x01 0x01 0x99 Ox9B Example Command EM4102 Parity Decoded TX gt Read Tag FF 01 03 10020218 RX gt Success FF 01 01 99 9B OxFF Header Ox01 Fixed 0x03 Length of payload Data Command Ox10 Read Command 0x02 Mode Byte EM4102 Parity Deco

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