SRIX4K_08 Datasheet, PDF (8/47 Pages) STMicroelectronics – 13.56 MHz short-range contactless memory chip with 4096-bit EEPROM, anticollision and anti-clone functions

Signal description
SRIX4K
The SRIX4K contactless EEPROM can be randomly read and written in block mode (each
block containing 32 bits). The instruction set includes the following ten commands:
● Read_block
● Write_block
● Initiate
● Pcall16
● Slot_marker
● Select
● Completion
● Reset_to_inventory
● Authenticate
● Get_UID
The SRIX4K memory is organized in three areas, as described in Figure 12. 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. The second area
provides two 32-bit binary counters which 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. Die floor plan
AC0
AC1
AI09055
2
Signal description
2.0.1
AC1, AC0
The pads for the antenna coil. AC1 and AC0 must be directly bonded to the antenna.
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