SL2S3003FUD datasheet(40/82 Pages) NXP

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NXP Semiconductors

SL2S3003/SL2S3003TT

ICODE 3 (TagTamper)

8.5.3.3 WRITE PASSWORD

Command code = B4h

The WRITE PASSWORD command is used to write a new password into the related memory:

• If the related old password has already been transmitted with a SET PASSWORD command, and

• If the addressed password is not locked (see Section 8.5.3.4 "LOCK PASSWORD").

Note: The WRITE PASSWORD command can only be executed in addressed or selected mode. The new

password takes effect immediately. That is, the new password must be transmitted with the SET PASSWORD

command to access protected blocks/pages.

The different passwords are addressed with the password identifier.

The timing of the command is write alike.

Option 0 (Option flag not set) is supported.

Option 1 (Option flag set) is supported.

Also, the WRITE CONFIG command to the related blocks 41-46 in the configuration memory can be used to

write the passwords. See Table 9.

Note: Use diversified passwords. For the privacy passwords, use diversified passwords per application. Only

use the configuration password in trusted environments.

SOF

Flags

WRITE PAS

SWORD

IC Mfg code UID

Password

identifier

Password

CRC16

EOF

8 bits

64 bits

optional

8 bits

32 bits

16 bits

Table 55. WRITE PASSWORD request format

Password identifier

Password

01h

Read

02h

Write

04h

Privacy

08h

Destroy

10h

EAS/AFI

20h

Configuration memory

Table 56. Password Identifier

SOF

Flags

Error code

CRC16

EOF

8 bits

16 bits

Table 57. WRITE PASSWORD response format when Error_flag set

SOF

Flags

CRC16

EOF

8 bits

16 bits

Table 58. WRITE PASSWORD 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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