SR176A4T1GE STMicroelectronics, SR176A4T1GE Datasheet

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MHz, 176-bit short range contactless user EEPROM Features ISO 14443-2 Type B air interface compliant ISO 14443-3 Type B frame format compliant 13.56 MHz carrier frequency 847.5 kHz subcarrier frequency 106 Kbit/s data transfer Data transfer – ASK modulation ...

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Contents Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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SR176 6 SR176 command summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 ...

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List of tables List of tables Table 1. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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SR176 List of figures Figure 1. Pad connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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... Description The SR176 is a contactless memory, powered by an externally transmitted radio wave. It contains 176 bits of user EEPROM, fabricated with STMicroelectronics CMOS technology. The memory is organized as 16 blocks of 16 bits, of which 11 blocks are user accessible. The SR176 is accessed via the 13.56 MHz carrier. Incoming data are demodulated and decoded from the received Amplitude Shift Keying modulation signal (ASK) ...

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SR176 The memory array of the SR176 is divided into two main areas: the unique identifier (UID) and the User EEPROM. The UID is a 64-bit unique identifier, written by ST during product manufacture. The User EEPROM is divided into ...

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Data transfer 3 Data transfer 3.1 Input data transfer from the Reader to the SR176 (request frame) The reader that accesses the SR176 must generate a 13.56 MHz sinusoidal carrier wave on its antenna, with enough energy to “tele-power” the ...

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SR176 3.4 Request end of frame The EOF, as shown in one falling edge followed by 10 ETUs set to logic 0 followed by one single rising edge Figure 4. SR176 request frame character format b0 Start 1 ETU "0" ...

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Data transfer 3.6 Character transmission format for answer frames The character format is the same as for the input data transfer frames include an SOF, data, a CRC and an EOF (as shown in data transfer, in case of error, ...

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SR176 3.9 Transmission frame Between the Request and the Answer data transfer, there is a guard time without ASK and BPSK modulation, for a minimum period of t from transmission to reception mode, and is applied after each frame. After ...

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... Device identification The SR176 has a 64-bit Unique Identifier (UID) which is written by STMicroelectronics during the manufacturing process. The UID is unique for each tag and cannot be altered stored in a Read Only Memory area (ROM). In the SR176, the UID is stored in the first four blocks of the memory in blocks ...

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SR176 4.2 Device selection After introducing the device in the reader’s electromagnetic field, the SR176 has to be activated by a INITIATE command. After this command, the SR176 is in the ACTIVE state and waits for a SELECT command, as ...

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Device operations (instructions) 5 Device operations (instructions) All instructions, data and the CRC are transmitted to the SR176 in 10-bit character format using ASK modulation. The start bit (b received by the SR176 on the antenna is demodulated by the ...

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SR176 5.1 INITIATE() Command Code = 06h,00h Prior to any other command, the SR176 must be activated by an INITIATE command. All other commands sent to the SR176 before the INITIATE are ignored. In response to receiving the INITIATE command, ...

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Device operations (instructions) 5.2 SELECT(Chip_ID) Command Code = 0Eh,(X.ID)h Prior to any memory access, the SR176 must have been set in the SELECTED state by a SELECT() command. All other commands sent to the SR176 before the SELECT(), except INITIATE(), ...

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SR176 Figure 21. SELECT frame exchange between Reader and SR176 Reader SOF 0Eh SR176 5.3 COMPLETION Command Code = 0Fh When the COMPLETION command is received, the SR176 is put in the DEACTIVED state, and does not decode any new ...

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Device operations (instructions) 5.4 READ_BLOCK Command Code = 08h,(X.AD) When receiving the READ_BLOCK command, the SR176 reads the requested block and sends back its 16-bit value in response bits of the address code, (X.AD) (b example, address 06h sends back ...

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... ISO/IEC 15963 and ISO/IEC 7816- read-only code, and comprises (as summarized in an 8-bit prefix, with the most significant bits set to D0h an 8-bit IC Manufacturer code (ISO/IEC 7816-6/AM1) set to 02h (for STMicroelectronics) a 6-bit IC code set to 00 0010b = 2d for SR176 a 42-bit Unique Serial Number Figure 28. 64-bit unique identifier of the SR176 ...

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Device operations (instructions) 5.6 WRITE_BLOCK Command Code = 09h,(X.AD) Prior to any WRITE_BLOCK command, the SR176 must have been set into the SELECTED state. When executing the WRITE_BLOCK command, the SR176 overwrites the contents of the addressed block with the ...

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SR176 5.7 PROTECT_BLOCK Command Code = 09h,0Fh,00h,LOCK_REG Prior to any PROTECT_BLOCK command, the SR176 must have been set into the SELECTED state. The PROTECT_BLOCK command allows the write access to be blocked to memory blocks 4 to 15. It must ...

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Device operations (instructions) Figure 32. PROTECT_BLOCK frame exchange between Reader and SR176 Reader SOF 09h 0Fh SR176 5.8 GET_PROTECTION Command Code = 08h,0Fh Prior to any GET_PROTECTION, the SR176 must have been set into the SELECTED state. GET_PROTECTION allows the ...

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SR176 Table 4. Chip_ID and LOCK_REG Block 15 Response bits parameter bits b LOCK_REG b 1: Blocks 14 and 15 are write-protected (0: indicates that write-access is allowed LOCK_REG b 1: Blocks 12 and 13 are write-protected ...

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SR176 command summary 6 SR176 command summary Figure 36. INITIATE frame exchange between Reader and SR176 Reader SOF 06h SR176 Figure 37. SELECT frame exchange between Reader and SR176 Reader SOF 0Eh SR176 Figure 38. COMPLETION frame exchange between Reader ...

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SR176 Figure 42. GET_PROTECTION frame exchange between Reader and SR176 Reader SOF 08h 0Fh SR176 CRC L CRC H EOF SOF Chip_ID SR176 command summary LOCK_REG CRC L CRC H EOF AI07716B 25/35 ...

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... These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. Table 5. ...

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SR176 8 DC and ac parameters This section summarizes the operating and measurement conditions, and the dc and ac characteristics of the device. The parameters in the dc and ac characteristic tables that follow are derived from tests performed under ...

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DC and ac parameters Figure 43. ASK modulated signal from the Reader to the contactless device t MIN CD Figure 44. Frame transmission between the Reader and the contactless device DATA Frame Transmitted by the SR176 ...

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SR176 9 Package mechanical In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second-level interconnect. The category of Second-Level Interconnect is marked on the package and on the inner box label, ...

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Package mechanical Figure 47. A4 antenna specification Table 10. A4 antenna specification Symbol A Coil width B Coil length A1 Inlay width B1 Inlay length Overall thickness of copper antenna coil Silicon thickness Q Unloaded Q value F Unloaded free-air ...

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SR176 Figure 48. A5 antenna specification Table 11. A5 antenna specification Symbol A Coil width B Coil length A1 Inlay width B1 Inlay length Overall thickness of copper antenna coil Silicon thickness Q Unloaded Q value F Unloaded free-air resonance ...

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... A5T = Copper Antenna on Continuous Tape A5S = Copper Singulated Adhesive Antenna on Tape Customer code XXX = Given by STMicroelectronics Note: Devices are shipped from the factory with the memory content bits erased to 1. for a list of available options (speed, package, etc.) or for further information on any aspect of this device, please contact your nearest ST sales office ...

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SR176 Appendix A ISO 14443 Type B CRC calculation #include <stdio.h> #include <stdlib.h> #include <string.h> #include <ctype.h> #define BYTE #define USHORTunsigned short unsigned short UpdateCrc(BYTE ch, USHORT *lpwCrc (ch^(BYTE)((*lpwCrc) & 0x00FF)); ch = (ch^(ch<<4)); *lpwCrc = (*lpwCrc ...

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Revision history Revision history Table 13. Document revision history Date Revision 23-Sep-2002 04-Oct-2004 29-Nov-2004 10-Apr-2007 34/35 1.0 Document written 2.0 First public release of full datasheet 3.0 INITIATE() command specified. Document reformatted. Small text changes. Document status changed from Datasheet ...

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... SR176 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...