SRTAG512L datasheet(21/51 Pages) STMICROELECTRONICS

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SRTAG512L

RF command sets

Note:

Block numbering rules:

When the RF host sends a command to the SRTAG512L the format of the payload is the C-

APDU.

When the SRTAG512L sends a command to the RF host, the format of the payload is the R-

APDU.

Table 12. PCB field of the I-Block format

b7-b6

b5b4b3b2

0b00

I-Block

RFU

Must be set to 0

DID field is present, if bit is set

Must be set to 0

Must be set to 1

Block number(1)

1. Follow ISO 14443_4 Block numbering rules (see note)

Reader rules:

Rule A: The Reader block number shall be initialized to 0.

Rule B:

When an I-block or an R(ACK) block with a block number equal to

the current block number is received, the Reader shall toggle the

current block number before optionally sending a block to the

SRTAG512L.

SRTAG512L rules:

Rule C. The SRTAG512L block number shall be initialized to 1 at activation.

Rule D.

When an I-block is received, the SRTAG512L shall toggle its block

number before sending a block.

Note:

The SRTAG512L may check if the received block number is not in

compliance with Reader rules to decide neither to toggle its internal block

number nor to send a response block.

Rule E.

When an R(ACK) block with a block number not equal to the current

SRTAG512L block number is received, the SRTAG512L shall toggle

its block number before sending a block.

Note:

There is no block number toggling when an R(NAK) block is received.

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