SRI4K-A3T/1GE STMicroelectronics, SRI4K-A3T/1GE Datasheet - Page 8

• Manufacturer Part Number: SRI4K-A3T/1GE
• Manufacturer: STMicroelectronics

Specifications of SRI4K-A3T/1GE

• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Compliant

SRI4K
CRC
The 16-bit CRC used by the SRI4K is generated in
compliance with the ISO14443 type B recommen-
dation. For further information, please see
PENDIX
FFFFh.
The two-byte CRC is present in every Request
and in every Answer Frame, before the EOF. The
CRC is calculated on all the bytes between SOF
(not included) and the CRC field.
Figure 12. CRC Transmission Rules
8/41
A.. The initial register contents are all 1s:
LSbit
CRC 16 (8 bits)
LSByte
AP-
MSbit
Upon reception of a Request from a reader, the
SRI4K verifies that the CRC value is valid. If it is in-
valid, the SRI4K discards the frame and does not
answer the reader.
Upon reception of an Answer from the SRI4K, the
reader should verify the validity of the CRC. In
case of error, the actions to be taken are the read-
er designer’s responsibility.
The CRC is transmitted with the Least Significant
Byte first and each byte is transmitted with the
least significant bit first.
LSbit
CRC 16 (8 bits)
MSByte
ai07667
MSbit