Datasheet

113730 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 3.0 — 14 March 2007 11 of 33
NXP Semiconductors
SL2 ICS53/SL2 ICS54
I•CODE SLI-S/I•CODE SLI-S HC
PUBLIC
The different passwords are addressed with the Password Identifier.
Table 5. Request format
SOF Flags Get Random
Number
IC Mfg
code
UID CRC16 EOF
8 bits 8 bits 8 bits 64 bits 16 bits
8 bits
Table 6. Response format when Error_flag is set
SOF Flags Error code CRC16 EOF
8 bits 8 bits 16 bits
Table 7. Response format when Error_flag is NOT set
SOF Flags Random Number CRC16 EOF
8 bits 16 bits 16 bits
8.1.3.2 Set password
Command Code = B3h
With the Set Password command the different Passwords can be transmitted to the Label
to get access to the different protected functionalities on the following commands. The Set
Password command has to be executed just once for the related passwords if the label is
powered.
Remark: The Set Password command can only be executed in addressed or selected
mode except of the Privacy Password.
The XOR Password has to be calculated with the password and two times the received
random number from the last Get Random Number command:
XOR_Password[31:0] = Password[31:0] XOR {Random_Number[15:0],
Random_Number[15:0]}
The different passwords are addressed with the Password Identifier.
Table 8. Request format
SOF Flags Set
Password
IC Mfg
code
UID Password
Identifier
XOR
Password
CRC16 EOF
8 bits 8 bits 8 bits 64 bits 8 bits 32 bits 16 bits
8 bits
Table 9. Password Identifier
Password Identifier Password
01h Read
02h Write
04h Privacy
08h Destroy SLI-S
10h EAS