Datasheet

Unique ID9
The devices feature a 96-bit unique device identifier which provides a reference number that
is unique for any device and in any context. The 96 bits of the identifier can never be altered
by the user.
The unique device identifier can be read in single bytes and may then be concatenated using
a custom algorithm.
The unique device identifier is ideally suited:
•
For use as serial numbers
•
For use as security keys to increase the code security in the program memory while using
and combining this unique ID with software cryptograhic primitives and protocols before
programming the internal memory.
•
To activate secure boot processes
Table 15: Unique ID registers (96 bits)
Unique ID bitsContent
description
Address
01234567
U_ID[7:0]
X co-ordinate
on the wafer
0x48CD
U_ID[15:8]0x48CE
U_ID[23:16]
Y co-ordinate
on the wafer
0x48CF
U_ID[31:24]0x48D0
U_ID[39:32]Wafer number0x48D1
U_ID[47:40]
Lot number
0x48D2
U_ID[55:48]0x48D3
U_ID[63:56]0x48D4
U_ID[71:64]0x48D5
U_ID[79:72]0x48D6
U_ID[87:80]0x48D7
U_ID[95:88]0x48D8
DocID14771 Rev 1254/124
STM8S105xxUnique ID