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 17: Unique ID registers (96 bits)
Unique ID bitsContent
description
Address
01234567
U_ID[7:0]
X co-ordinate
on the wafer
0x4865
U_ID[15:8]0x4866
U_ID[23:16]
Y co-ordinate
on the wafer
0x4867
U_ID[31:24]0x4868
U_ID[39:32]Wafer number0x4869
U_ID[47:40]
Lot number
0x486A
U_ID[55:48]0x486B
U_ID[63:56]0x486C
U_ID[71:64]0x486D
U_ID[79:72]0x486E
U_ID[87:80]0x486F
U_ID[95:88]0x4870
49/116DocID15590 Rev 8
Unique IDSTM8S903K3 STM8S903F3