ST25TA02K datasheet(23/50 Pages) STMICROELECTRONICS

Numer części	ST25TA02K

Szczegółowy opis	NFC Forum Type 4 Tag IC with 2-Kbit EEPROM

PDF	50 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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ST25TA02K

RF command sets

5.3

R-Block format

The R-Block is used to convey positive or negative acknowledgment between the RF host

and the ST25TA02K.

There are two kinds of R-Blocks:

•

R(ACK): the acknowledgment block sent by the RF host or by the ST25TA02K

•

R(NAK): the non-acknowledgment block sent by the RF host

Table 15. R-Block format

NFC frame

SoD

EoD

PCB

DID

Payload

CRC

Length

1 byte

0 byte

2 bytes

R(ACK) without the DID field: 0xA2 or 0xA3

R(ACK) with the DID field: 0xAA or 0xAB

R(NAK) without the DID field: 0xB2 or 0xB3

R(NAK) with the DID field: 0xBA or 0xBB

DID field (optional)

2 CRC bytes

Table 16. R-Block detailed format

b7-b6

b5b4b3

0b10

R-Block

Must be set to 1.

0: NAK

1: ACK

0: DID field is not present

1: DID field is present

Must be set to 0

Block number

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