SRT512 datasheet(8/46 Pages) STMICROELECTRONICS

Part #	SRT512

Description	13.56 MHz short-range contactless memory chip with 512-bit EEPROM and anticollision functions

PDF	46 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Signal description

SRT512

8/46

Doc ID 13277 Rev 4

The SRT512 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 SRT512 memory is organized in three areas, as described in Table 12. The first area is

an EEPROM area where all blocks behave as User blocks.

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.

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

SRT512 Datasheet(PDF) 8 Page - STMicroelectronics