SRI4K datasheet(8/45 Pages) STMICROELECTRONICS

No de pièce	SRI4K

Description	13.56 MHz short-range contactless memory chip with 4096-bit EEPROM and anticollision functions

PDF	45 Pages

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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Signal description

SRI4K

8/45

The SRI4K 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 SRI4K memory is organized in three areas, 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 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

Signal description

2.1

AC1, AC0

The pads for the Antenna Coil. AC1 and AC0 must be directly bonded to the antenna.

AI09055

AC1

AC0

SRI4K Fiches technique(PDF) 8 Page - STMicroelectronics