1/6 data briefing july 2003 complete data available under nda. SRIX512 13.56mhz short range contactless memory chip with 512-bit eeprom, anti-collision and anti-clone functions features summary n iso 14443 - 2 type b air interface compliant n iso 14443 - 3 type b frame format compliant n 13.56mhz carrier frequency n 847khz sub-carrier frequency n 106 kbit/s data transfer n france telecom proprietary anti-clone function n 8 bits chip_id based anticollision system n 2 count-down binary counters C 32 bits each C2 32 units to be counted down n 64-bit unique identifier n 512-bit eeprom with write protect feature n read block & write block (32 bits) n internal tuning capacitor n 1million erase/write cycles n 10-year data retention n self-timed programming cycle n 5ms typical programming time figure 1. delivery forms wafer antenna ( a3) antenna ( a4 ) antenna ( a5)
SRIX512 2/6 summary description the SRIX512 is a contactless memory, powered by an externally transmitted radio wave. it contains a 512-bit user eeprom fabricated with stmicro- electronics cmos technology. the memory is or- ganised as 16 blocks of 32 bits. the SRIX512 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 SRIX512 and the reader is 106kbit/s in both reception and emission modes. the SRIX512 follows the iso 14443 part 2 type b recommendation for the radio-frequency power and signal interface. figure 2. logic diagram the SRIX512 targets short range applications which need secure and re-usable products. the SRIX512 includes an anti-collision mechanism that allows it to detect and select tags present at the same time within range of the reader. the anti- collision is based on a probabilistic scanning meth- od using slot markers. the SRIX512 provides an anti-clone function which allows its authentication. using the stmicroelectronics single chip coupler, crx14, it is easy to design a reader with the au- thentication capability and to build a system with a high level of security. table 1. signal names the SRIX512 contactless eeprom can be ran- domly read and written in block mode. each block is composed of 32 bits. it offers a set of 10 com- mands: n read_block n write_block n initiate n pcall16 n slot_marker n select n completion n reset_to_inventory n authenticate n get_uid the SRIX512 memory array is divided in three, as described in figure 3. the first area is a resettable otp (one time programmable) area in which bits can only be switched from 1 to 0. using a special command, it is possible to erase all the bits of this area to 1. the second area provides two 32-bit bi- nary 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 area. it is accessible in blocks of 32 bits, and automatically invokes an auto-erase cycle during each write_block command. ai08560 ac1 SRIX512 ac0 power supply regulator bpsk load modulator ask demodulator 512-bit user eeprom ac1 antenna coil ac0 antenna coil
3/6 SRIX512 memory mapping the SRIX512 is organised as 16 blocks of 32 bits as shown in figure 3. 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 up- dates all the 32 bits of the block. figure 3. SRIX512 memory mapping block addr msb 32 bits block lsb b 31 b 24 b 23 b 16 b 15 b 8 b 7 b 0 description 0 32-bit boolean area resettable otp bits 1 32-bit boolean area 2 32-bit boolean area 3 32-bit boolean area 4 32-bit boolean area 5 32-bit binary counter count down counter 6 32-bit binary counter 7 user area lockable eeprom 8 user area 9 user area 10 user area 11 user area 12 user area 13 user area 14 user area 15 user area 255 otp_lock_reg st reserved fixed chip_id (option) system otp bits uid0 64-bit uid area rom uid1
SRIX512 4/6 part numbering 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 of- fice. table 2. ordering information scheme example: SRIX512 Cw4/xxx device type SRIX512 package w4 =180 m m 15 m m unsawn wafer sbn18= 180m 15 m bumped & sawn wafer on 8inches 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
5/6 SRIX512 revision history table 3. document revision history date version revision details 11-jul-2003 1.0 first issue
SRIX512 6/6 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is registered trademark of stmicroelectronics all other names are the property of their respective owners ? 2003 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - unit ed states. www.st.com
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