SRTAG2K-D datasheet(33/51 Pages) STMICROELECTRONICS

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SRTAG2K-D

RF command sets

5.7.4

Disable Verification Requirement command

The Disable Requirement command deactivates the protection by password of the NDEF

file. When this command is successful, the read or write access to the NDEF file is granted

without security requirements. 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 access right of the NDEF file.

This command can update the right access of the NDEF file by writing into the EEPROM. In

this case, the response timing will be around 6 ms.

Table 39

defines the Disable Verification Requirement command.

Table 40

defines the R-APDU of the Disable Verification Requirement command.

Table 38. R-APDU of the Enable Verification Requirement command

Data

SW1

SW2

Comment

Length

1 byte

Value

0x90

0x00

Command completed, the password is

correct

Value

0x69

0x81

Cmd is incompatible with the file structure

Value

0x69

0x82

Security status not satisfied

Value

0x6A

0x80

CC file or System file selected

Value

0x6A

0x82

File or application not found

Value

0x6A

0x86

Incorrect P1 or P2 values

Table 39. Disable Verification Requirement command format

Name

CLA

INS

P1 & P2

Data

0x00

0x26

2 bytes

Class byte

Instruction code

New security attributes

0x0001: Disable the read protection of the NDEF file

0x0002: Disable the write protection of the NDEF file

Other: RFU

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