STM8S105C4B3 STMICROELECTRONICS [STMicroelectronics], STM8S105C4B3 Datasheet - Page 57

• Manufacturer Part Number: STM8S105C4B3
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STM8S105xx
9
Unique ID
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:
•
•
•
Address
0x48CD
0x48CE
0x48CF
0x48D0
0x48D1
0x48D2
0x48D3
0x48D4
0x48D5
0x48D6
0x48D7
0x48D8
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
Content
description
Wafer number
X co-ordinate
Y co-ordinate
on the wafer
on the wafer
Lot number
Table 15: Unique ID registers (96 bits)
Unique ID bits
7
DocID14771 Rev 9
6
5
4
U_ID[23:16]
U_ID[31:24]
U_ID[39:32]
U_ID[47:40]
U_ID[55:48]
U_ID[63:56]
U_ID[71:64]
U_ID[79:72]
U_ID[87:80]
U_ID[95:88]
U_ID[15:8]
U_ID[7:0]
3
2
1
Unique ID
0
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