LRI2K datasheet(29/89 Pages) STMICROELECTRONICS

Part #	LRI2K

Description	13.56 MHz, 2048-bit EEPROM tag IC with 64-bit UID and kill code, ISO 15693 and ISO 18000-3 Mode 1 compliant

PDF	89 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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29 / 89 page

LRI2K

Data storage format identifier (DSFID)

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Data storage format identifier (DSFID)

The Data Storage Format IDentifier indicates how the data is structured in the LRI2K

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,

respectively. It is coded on one byte.

9.1

CRC

The CRC used in the LRI2K is calculated as per the definition in ISO/IEC 13239.

The initial register contents are all ones: "FFFF".

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

the EOF. The CRC is calculated on all the bytes between the SOF and the CRC field.

Upon reception of a request from the VCD, the LRI2K verifies that the CRC value is valid. If

it is invalid, the LRI2K discards the frame and does not answer to the VCD.

Upon reception of a response from the LRI2K, 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 designers.

The CRC is transmitted least significant byte first.

Each byte is transmitted least significant bit first.

Table 6.

CRC transmission rules

LSByte

MSByte

LSBit

MSBit LSBit

MSBit

CRC 16 (8bits)

CRC 16 (8 bits)

LRI2K Datasheet(PDF) 29 Page - STMicroelectronics