LRIS2K_11 datasheet(36/98 Pages) STMICROELECTRONICS

Numer części	LRIS2K

Szczegółowy opis	2048-bit EEPROM tag IC at 13.56 MHz, with 64-bit UID and Password, ISO15693 and ISO18000-3 Mode 1 compliant

PDF	98 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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36 / 98 page

Data storage format identifier (DSFID)

LRIS2K

36/98

Doc ID 13888 Rev 9

Data storage format identifier (DSFID)

The data storage format identifier indicates how the data is structured in the LRIS2K

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.

11.1

CRC

The CRC used in the LRIS2K is calculated as per the definition in ISO/IEC 13239.

The initial register contents are all ones: FFFFh.

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 LRIS2K verifies that the CRC value is valid.

If it is invalid, the LRIS2K discards the frame and does not answer to the VCD.

Upon reception of a request from the LRIS2K, 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 12.

CRC transmission rules

LSByte

MSByte

LSBit

MSBit

LSBit

MSBit

CRC 16 (8 bits)

LRIS2K Arkusz danych(PDF) 36 Page - STMicroelectronics