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SRI512A4T Datasheet(PDF) 3 Page - STMicroelectronics |
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SRI512A4T Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 6 page SRI512 Summary description 3/6 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 (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 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 AI09055 AC1 AC0 |
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