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SRI512
13.56-MHz Short-range Contactless Memory Chip with 512-bit EEPROM and Anti-Collision functions
Data Brief
Features

ISO 14443 - 2 Type B Air Interface Compliant ISO 14443 - 3 Type B Frame Format Compliant 13.56MHz Carrier Frequency 847kHz Sub-carrier Frequency 106 kbit/second Data Transfer 8-bit Chip_ID based anticollision system 2 Count-Down Binary Counters with automated Anti-tearing protection 64-bit Unique Identifier 512-bit EEPROM with Write Protect feature Read Block and Write Block (32 bits) Internal Tuning Capacitor 1million Erase/Write Cycles 40-Year Data Retention Self-Timed Programming Cycle 5ms Typical Programming Time Antenna (A5) Antenna (A4) Antenna (A3)

Wafer
April 2006
Rev 2
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For further information contact your local STMicroelectronics sales office.
Summary description
SRI512
Summary description
The SRI512 is a contactless memory, powered by an externally transmitted radio wave. It contains a 512-bit user EEPROM fabricated with STMicroelectronics CMOS technology. The memory is organized as 16 blocks of 32 bits. The SRI512 is accessed via the 13.56MHz carrier. Incoming data are demodulated and decoded from the received Amplitude Shift Keying (ASK) modulation signal and outgoing data are generated by load variation using Bit Phase Shift Keying (BPSK) coding of a 847kHz sub-carrier. The received ASK wave is 10% modulated. The Data transfer rate between the SRI512 and the reader is 106kbit/s in both reception and emission modes. The SRI512 follows the ISO 14443 part 2 type B recommendation for the radio-frequency power and signal interface. Figure 1. Logic Diagram
SRI512 Power Supply Regulator 512-bit User EEPROM ASK Demodulator BPSK Load Modulator AC1
AC0
AI10795
The SRI512 is specifically designed for short range applications that need re-usable products. The SRI512 includes an anti-collision mechanism that allows it to detect and select tags present at the same time within range of the reader. Using the STMicroelectronics single chip coupler, CRX14, it is easy to design a reader and build a contactless system. Table 1.
AC1 AC0
Signal Names
Antenna Coil Antenna Coil
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SRI512
Summary description The SRI512 contactless EEPROM can be randomly read and written in block mode (each block containing 32 bits). The instruction set includes the following nine commands:

READ_BLOCK WRITE_BLOCK INITIATE PCALL16 SLOT_MARKER SELECT COMPLETION RESET_TO_INVENTORY GET_UID
The SRI512 memory is organized in three areas. The first area is a resettable OTP (onetime programmable) area in which bits can only be switched from 1 to 0. Using a special command, it is possible to erase all bits of this area to 1. Optionally, this area can be set as an EEPROM area where all blocks behave as User blocks. This option is set by ST on request. The second area provides two 32-bit binary counters that can only be decremented from FFFFFFFFh to 00000000h, and gives a capacity of 4,294,967,296 units per counter. The last area is the EEPROM memory. It is accessible by block of 32 bits and includes an auto-erase cycle during each WRITE_BLOCK command. Figure 2. Die Floor Plan
AC0
AC1
AI09055
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Memory mapping
SRI512
Memory mapping
The SRI512 is organized as 16 blocks of 32 bits as shown in Table 2. All blocks are accessible by the READ_BLOCK command. Depending on the write access, they can be updated by the WRITE_BLOCK command. A WRITE_BLOCK updates all the 32 bits of the block. Table 2. SRI512 memory mapping
Block Msb Addr b31 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
32 bits Block b16 b15 b14 b8 b7
Lsb b0
Description
32 bits Boolean Area (option: User Area) 32 bits Boolean Area (option: User Area) 32 bits Boolean Area (option: User Area) 32 bits Boolean Area (option: User Area) 32 bits Boolean Area (option: User Area) 32 bits binary counter 32 bits binary counter User Area User Area User Area User Area User Area User Area User Area User Area User Area Lockable EEPROM Count down Counter Resettable OTP bits (option: lockable EEPROM)
255
OTP_Lock_Reg
OTP_ ST Reserved Config
Fixed Chip_ID (Option)
System OTP bits
UID0 64 bits UID Area UID1 ROM
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SRI512
Part numbering
Part numbering
Table 3.
Example:
Ordering Information Scheme
SRI512 - W4 / XXX
Device Type SRI512
Package W4 =180 m 15 m Unsawn Wafer SBN18 = 180m 15 m Bumped and Sawn Wafer on 8-inch Frame A3T = 38mm x 38mm Copper Antenna on Continuous Tape A3S = 38mm x 38mm Copper Singulated Adhesive Antenna on Tape A4T = 15mm x 15mm Copper Antenna on Continuous Tape A4S = 15mm x 15mm Copper Singulated Adhesive Antenna on Tape A5T = 42mm x 65mm Copper Antenna on Continuous Tape A5S = 42mm x 65mm 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.
Revision history
Table 4.
Date 23-Mar-2006 18-Apr-2006
Document revision history
Revision 1 2 Initial release. Added Memory mapping on page 4. Changes
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SRI512
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