ST25TA02K datasheet(38/50 Pages) STMICROELECTRONICS

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RF command sets

ST25TA02K

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Note:

For further return codes and definitions, refer to Section 5.6.2: Status and error codes.

5.9

Specific RF command set

This section describes the command set that can be issued only by the RF host.

5.9.1

Anticollision command set

Table 46 lists the commands that can be issued only by the RF host. The format of these

commands is described in the NFC Forum Digital Protocol specification.

Note:

In response to a SDD_REQ Command with a SEL_PAR value equal to 20h, ST25TA02K in

the Operating Field transmit the requested cascade level of their NFCID1 (NFCID1 CLn,

with n=1 or 2). The NFCID1 of ST25TA02K consists of 7 bytes. The length of the Response

containing a complete NFCID1 cascade level (i.e., NFCID1 CL1, or NFCID1 CL2) is always

5 bytes. The coding of the Response depends on the value of the SEL_CMD byte and the

size of the NFCID1.

Refer to example below for more details .

Value

0x6A

0x82

File or application not found

Value

0x6A

0x86

Incorrect P1 or P2 values

Table 45. R-APDU table of the EnablePermanentState command (continued)

Data

SW1

SW2

Comment

Table 46. Commands issues by the RF host

Family command set

Command name

Instruction code

NFC-A technology

ALL_REQ

0x52 (1)

1. Code on 7 bits.

SENS_REQ

0x26 (1)

SDD_REQ

0x93 or 0x95

SEL_REQ

0x93 or 0x95

SLP_REQ

0x50

Table 47. Example of anticollision sequence

Command

Code

Comment

Response

Code

Comment

SENS_REQ

ALL-REQ

ATQA

42 00

UID double size bit

frame anticollision

SDD_REQ 1

93 20

NVB 20

Number Valid bit

(2 bytes Code & NVB)

CT uid1 uid2

uid3 BCC

CT Cascade Tag

“0x88”

(UID 7bytes)

BCC Block Check

Character (XOR

previous Bytes)

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