sri512 STMicroelectronics, sri512 Datasheet - Page 8

• Manufacturer Part Number: sri512
• Description: 13.56-mhz Short-range Contactless Memory Chip With 512-bit Eeprom And Anti-collision Functions
• Manufacturer: STMicroelectronics

Signal description
2
2.1
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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:
The SRI512 memory is organized in three areas, as described in
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.
The second area provides two 32-bit binary counters that can only be decremented from
FFFF FFFFh to 0000 0000h, 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.
Signal description
AC1, AC0
The pads for the Antenna Coil. AC1 and AC0 must be directly bonded to the antenna.
READ_BLOCK
WRITE_BLOCK
INITIATE
PCALL16
SLOT_MARKER
SELECT
COMPLETION
RESET_TO_INVENTORY
GET_UID
Die floor plan
AC0
AC1
AI09055
Table
3. The first area is a
SRI512