ST25TA64K datasheet(29/45 Pages) STMICROELECTRONICS

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ST25TA64K

RF command sets

Table 33 defines the R-APDU of the Verify command.

5.7.2

Change Reference Data command

The Change Reference Data command replaces the read or write password related to the

NDEF files previously selected. It can be performed only if the security status satisfies the

security attributes for this command.

Before sending this command, the verify command with the correct NDEF write password

shall be issued. Thus, this command changes the reference data of the NDEF file.

Table 34 defines the Change Reference Data command.

Table 34. Change reference data command format

Table 33. R-APDU of the Verify command

Data

SW1

SW2

Comment

Length

1 byte

Value

0x90

0x00

Command completed, the password is correct

Value

0x69

0x85

The conditions of use are not satisfied (e.g. no

NDEF file was selected)

Value

0x69

0x81

Cmd incompatible with file structure

Value

0x69

0x82

Security status not satisfied

Value

0x6A

0x80

Incorrect parameter in cmd data field

Value

0x63

0x00

A password is required

Value

0x63

0xCX (1)

1. At each session, the RF host can check a password 3 times.

The password transmitted is incorrect and X

encodes the number of further allowed retries.

Value

0x6E

0x00

Class not supported

Name

CLA

INS

P1 & P2

Data

0x00

0x24

2 bytes

1 byte

Lc bytes

Class byte

Instruction code

Password identification

0x0001: Read password transmit

0x0002: Write password transmit

Other: RFU

0x10: the password is present in the data field

NDEF file Password

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