SRI512-A5T/1GE STMicroelectronics, SRI512-A5T/1GE Datasheet - Page 13
SRI512-A5T/1GE
Manufacturer Part Number
SRI512-A5T/1GE
Description
Manufacturer
STMicroelectronics
Datasheet
1.SRI512-A5T1GE.pdf
(50 pages)
Specifications of SRI512-A5T/1GE
Operating Temperature (max)
85C
Operating Temperature Classification
Commercial
Lead Free Status / RoHS Status
Compliant
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S R I512
3.4
CRC
The 16-bit CRC used by the SRI512 is generated in compliance with the ISO14443 Type B
recommendation. For further information, please see
contents are all 1’s: 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.
Upon reception of a Request from a reader, the SRI512 verifies that the CRC value is valid.
If it is invalid, the SRI512 discards the frame and does not answer the reader.
Upon reception of an Answer from the SRI512, the reader should verify the validity of the
CRC. In case of error, the actions to be taken are the reader designer’s responsibility.
The CRC is transmitted with the Least Significant Byte first and each byte is transmitted with
the least significant bit first.
Figure 11. CRC transmission rules
LSbit
CRC 16 (8 bits)
LSByte
MSbit
LSbit
Appendix
A. The initial register
CRC 16 (8 bits)
MSByte
Data transfer
ai07667
MSbit
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