SRI4K-SBN181GE STMICROELECTRONICS [STMicroelectronics], SRI4K-SBN181GE Datasheet - Page 19

• Manufacturer Part Number: SRI4K-SBN181GE
• Description: 13.56 MHz short-range contactless memory chip with 4096-bit EEPROM and anticollision functions
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

SRI4K
5
SRI4K operation
All commands, data and CRC are transmitted to the SRI4K as 10-bit characters using ASK
modulation. The start bit of the 10 bits, b
SRI4K at the antenna is demodulated by the 10% ASK demodulator, and decoded by the
internal logic. Prior to any operation, the SRI4K must have been selected by a Select
command. Each frame transmitted to the SRI4K 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 SRI4K (wrong command or CRC error), the memory does not
return any error code.
When a valid frame is received, the SRI4K 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 SRI4K sending the 2 CRC bytes and the
EOF.
0
, is sent first. The command frame received by the
SRI4K operation
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