SL2S3003FUD datasheet(42/82 Pages) NXP

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NXP Semiconductors

SL2S3003/SL2S3003TT

ICODE 3 (TagTamper)

8.5.3.5 64-BIT PASSWORD PROTECTION

Command code = BBh

The 64-bit PASSWORD PROTECTION command instructs the Label IC that both the Read and Write

passwords are required to get access to password-protected blocks (pages). This mode can be enabled if the

Read and Write passwords have been transmitted first with a SET PASSWORD command.

If the 64-bit password protection is enabled, both passwords are required for read and write access to protected

blocks (pages).

Once the 64-bit password protection is enabled, a change back to 32-bit password protection (read and write

password) is not possible.

Note:

1. The retransmission of the passwords is not required after the execution of the 64-bit PASSWORD

PROTECTION command.

2. The 64-bit PASSWORD PROTECTION does not include the 16-bit counter block.

The timing of the command is write alike.

Also, setting the OTP_PWD64_EN to 1 with a WRITE CONFIG command to block 31 in the configuration

memory can enable the 64-bit PASSWORD PROTECTION. See Table 9 and Table 32.

SOF

Flags

64 BIT PAS

SWORD PROTEC

TION

IC Mfg code

UID

CRC16

EOF

8 bits

64 bits optional 16 bits

Table 63. 64-BIT PASSWORD PROTECTION request format

SOF

Flags

Error code

CRC16

EOF

8 bits

16 bits

Table 64. 64-BIT PASSWORD PROTECTION response format when Error_flag set

SOF

Flags

CRC16

EOF

8 bits

16 bits

Table 65. 64-BIT PASSWORD PROTECTION response format when Error_flag NOT set

SL2S3003/SL2S3003TT

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Product data sheet

Rev. 3.0 — 28 March 2024

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