LRIS64K datasheet(37/100 Pages) STMICROELECTRONICS

Part #	LRIS64K

Description	64 Kbit EEPROM tag IC at 13.56 MHz with 64-bit UID and password based on ISO/IEC 15693 and ISO/IEC 18000-3 Mode 1

PDF	100 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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37 / 100 page

LRIS64K

Data storage format identifier (DSFID)

Doc ID 15336 Rev 11

37/100

Data storage format identifier (DSFID)

The data storage format identifier indicates how the data is structured in the LRIS64K

memory. The logical organization of data can be known instantly using the DSFID. It can be

programmed and locked using the Write DSFID and Lock DSFID commands.

13.1

CRC

The CRC used in the LRIS64K is calculated as per the definition in ISO/IEC 13239. The

initial register contents are all ones: “FFFF”.

The two-byte CRC are appended to each request and response, within each frame, before

the EOF. The CRC is calculated on all the bytes after the SOF up to the CRC field.

Upon reception of a request from the VCD, the LRIS64K verifies that the CRC value is valid.

If it is invalid, the LRIS64K discards the frame and does not answer to the VCD.

Upon reception of a Response from the LRIS64K, it is recommended that the VCD verifies

whether the CRC value is valid. If it is invalid, actions to be performed are left to the

discretion of the VCD designer.

The CRC is transmitted least significant byte first. Each byte is transmitted least significant

bit first.

Table 13.

CRC transmission rules

LSByte

LSBit

MSBit

MSByte

LSBit

MSBit

CRC 16 (8 bits)

LRIS64K Datasheet(PDF) 37 Page - STMicroelectronics