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STM8S105C4B3 Datasheet(PDF) 57 Page - STMicroelectronics

Part # STM8S105C4B3
Description  Access line, 16 MHz STM8S 8-bit MCU, up to 32 Kbytes Flash, integrated EEPROM,10-bit ADC, timers, UART, SPI, I²C
PDF  127 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM8S105C4B3 Datasheet(HTML) 57 Page - STMicroelectronics

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Unique ID
9
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 bits
Content
description
Address
0
1
2
3
4
5
6
7
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 number
0x48D1
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
57/127
DocID14771 Rev 9
Unique ID
STM8S105xx



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