SRIX4K datasheet(20/50 Pages) STMICROELECTRONICS

Part #	SRIX4K

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

PDF	50 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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20 / 50 page

SRIX4K operation

SRIX4K

20/50

SRIX4K operation

All commands, data and CRC are transmitted to the SRIX4K as 10-bit characters using ASK

modulation. The start bit of the 10 bits, b0, is sent first. The command frame received by the

SRIX4K at the antenna is demodulated by the 10% ASK demodulator, and decoded by the

internal logic. Prior to any operation, the SRIX4K must have been selected by a SELECT

command. Each frame transmitted to the SRIX4K must start with a Start Of Frame, followed

by one or more data characters, two CRC Bytes and the final End Of Frame. When an

invalid frame is decoded by the SRIX4K (wrong command or CRC error), the memory does

not return any error code.

When a valid frame is received, the SRIX4K may have to return data to the reader. In this

case, data is returned using BPSK encoding, in the form of 10-bit characters framed by an

SOF and an EOF. The transfer is ended by the SRIX4K sending the 2 CRC Bytes and the

EOF.

SRIX4K Datasheet(PDF) 20 Page - STMicroelectronics