ST25TA02K-D Datasheet, PDF (34/64 Pages) STMicroelectronics – NFC Forum Type 4 Tag IC with 2-Kbit EEPROM and general purpose digital output

RF command sets
ST25TA02K-D
Note:
After receiving the deselect command, the session is released and ST25TA02K-D enters
the Standby power mode.
In response to a RATS command, ST25TA02K-D returns FWI parameter (default frame
waiting time used); when ST25TA02K-D 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-D 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-
D. 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
5.6.1
5.6.2
NFC Forum Type 4 Tag protocol
Commands set
ST25TA02K-D command set is built to easily support the NFC Forum Type 4 Tag protocol.
Table 20. Command set overview
Command name
Brief description
NDEF Tag Application Select Select the NDEF Tag Application
Capability Container Select
NDEF Select
System File Select
ReadBinary
Select the capability container (CC) file using the Select command
Select the NDEF file using the Select command.
Select the system file using the Select command.
Read data from a file
UpdateBinary
Write new data to a file
Status and error codes
This section lists the status and the error code of the ST25TA02K-D.
Value
Table 21. Status code of the ST25TA02K-D
SW1
SW2
Comment
0x90
0x00
Command completed successfully
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