STM8TL52X4 datasheet(42/84 Pages) STMICROELECTRONICS

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Unique ID

STM8TL52x4 STM8TL53x4

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DocID022344 Rev 7

Unique ID

STM8TL5xx4 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 byte 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 cryptographic primitives and

protocols before programming the internal memory



To activate secure boot processes

Table 12. Unique ID registers (96 bits)

Address

Content

description

Unique ID bits

0x4925

X coordinate on

the wafer

U_ID[7:0]

0x4926

U_ID[15:8]

0x4927

Y coordinate on

the wafer

U_ID[23:16]

0x4928

U_ID[31:24]

0x4929

Wafer number

U_ID[39:32]

0x492A

Lot number

U_ID[47:40]

0x492B

U_ID[55:48]

0x492C

U_ID[63:56]

0x492D

U_ID[71:64]

0x492E

U_ID[79:72]

0x492F

U_ID[87:80]

0x4930

U_ID[95:88]

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