ST25TA02K datasheet(21/50 Pages) STMICROELECTRONICS

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ST25TA02K

RF command sets

Note:

Block numbering rules:

When the RF host sends a command to the ST25TA02K the format of the payload is the

C-APDU.

When the ST25TA02K 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

ST25TA02K.

ST25TA02K rules:

Rule C. The ST25TA02K block number shall be initialized to 1 at activation.

Rule D. When an I-block is received, the ST25TA02K shall toggle its block

number before sending a block.

Note:

The ST25TA02K 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

ST25TA02K block number is received, the ST25TA02K 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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