STM8S207MB datasheet(50/103 Pages) STMICROELECTRONICS

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Unique ID

STM8S207xx, STM8S208xx

50/103

Doc ID 14733 Rev 12

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:

●

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 crytograhic primitives and protocols

before programming the internal memory.

●

To activate secure boot processes

Table 14.

Unique ID registers (96 bits)

Address

Content

description

Unique ID bits

0x48CD

X co-ordinate on

the wafer

U_ID[7:0]

0x48CE

U_ID[15:8]

0x48CF

Y co-ordinate on

the wafer

U_ID[23:16]

0x48D0

U_ID[31:24]

0x48D1

Wafer number

U_ID[39:32]

0x48D2

Lot number

U_ID[47:40]

0x48D3

U_ID[55:48]

0x48D4

U_ID[63:56]

0x48D5

U_ID[71:64]

0x48D6

U_ID[79:72]

0x48D7

U_ID[87:80]

0x48D8

U_ID[95:88]

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