Rainbow-electronics MAX66120 Bedienungsanleitung PDF herunterladen (Seite 20)

MAX66120

ISO 15693-Compliant 1Kb Memory Fob

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Figure 17. CRC-16-CCITT Generator

1ST

STAGE

MSb

LSb

2ND

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7TH

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8TH

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6TH

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3RD

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4TH

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5TH

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POLYNOMIAL = X

+ X

+ 1

INPUT DATA

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Command-Specific ISO 15693 Communication Protocol—Legend

SYMBOL DESCRIPTION

GSY Command “Get System Information”

WSB Command “Write Single Block”

LBL Command “Lock Block”

RSB Command “Read Single Block”

RMB Command “Read Multiple Blocks”

CRB Command “Custom Read Block”

WAFI Command “Write AFI”

LAFI Command “Lock AFI”

WDSF Command “Write DSFID”

LDSF Command “Lock DSFID”

SOF Start of Frame

RQF Request Flags byte (always sent by master)

CRC-16

Transmission of an inverted CRC-16 (2 bytes)

generated according to CRC-16-CCITT

EOF End of Frame

RSF Response Flags byte (always sent by slave)

[UID]

The tag’s unique 8-byte identification number;

could be sent by either the master or the slave.

The brackets [ ] indicate that the transmission

of the UID depends on the request flags (RQF).

SYMBOL DESCRIPTION

IFLG Info Flags byte (always sent by slave)

DSFID Data Storage Format Identifier byte

AFI Application Family Identifier byte

NBLK

Number of Blocks byte (slave memory size

indicator)

MBS

Memory Block Size byte (slave memory block

size)

ICR IC Reference byte (slave chip revision)

MFG Manufacturer Code byte (2Bh)

ERRC Error Code byte (see Table 5)

BN New Block Data (8 bytes)

BDATA Buffer Data (8 bytes)

MDATA Memory Data (8 bytes)

SECS Block Security Status byte

SBN Starting Block Number byte

#BLK Number of Blocks to Read byte

INTB 2 Integrity bytes (block write cycle counter)

1 2 ... 15 16 17 18 19 20 21 22 23 24

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