ST25TA02K datasheet(25/50 Pages) STMICROELECTRONICS

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ST25TA02K

RF command sets

Note:

After receiving the deselect command, the session is released and ST25TA02K enters the

Standby power mode.

In response to a RATS command, ST25TA02K returns FWI parameter (default frame waiting

time used); when ST25TA02K needs more time for a command execution, it requests a

frame waiting time extension by responding 0xF2 0xWTX (Request waiting time = FWI *

WTX). If the reader accepts ST25TA02K request, it acknowledges by sending the command

0xF2 0xWTX. The frame waiting time becomes FWI * WTX for the current command only.

5.5

CRC of the RF frame

The two CRC bytes check the data transmission between the RF host and the ST25TA02K.

For the RF frame, the CRC is computed on all the data bits in the frame, excluding parity

bits, SOF and EOF, and the CRC itself.

The CRC is as defined in ISO/IEC 13239. The initial register content shall be 0x6363 and

the register content shall not be inverted after calculation.

5.6

NFC Forum Type 4 Tag protocol

5.6.1

Commands set

ST25TA02K command set is built to easily support the NFC Forum Type 4 Tag protocol.

5.6.2

Status and error codes

This section lists the status and the error code of the ST25TA02K.

Table 19. Command set overview

Command name

Brief description

NDEF Tag Application Select

Select the NDEF Tag Application

Capability Container Select

Select the capability container (CC) file using the Select command

NDEF Select

Select the NDEF file using the Select command.

System File Select

Select the system file using the Select command.

ReadBinary

Read data from a file

UpdateBinary

Write new data to a file

Table 20. Status code of the ST25TA02K

SW1

SW2

Comment

Value

0x90

0x00

Command completed successfully

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