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STM8S903K3 Datasheet(PDF) 50 Page - STMicroelectronics |
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STM8S903K3 Datasheet(HTML) 50 Page - STMicroelectronics |
50 / 121 page Unique ID STM8S903K3 STM8S903F3 50/121 DocID15590 Rev 10 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: 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 17. Unique ID registers (96 bits) Address Content description Unique ID bits 76543 210 0x4865 X co-ordinate on the wafer U_ID[7:0] 0x4866 U_ID[15:8] 0x4867 Y co-ordinate on the wafer U_ID[23:16] 0x4868 U_ID[31:24] 0x4869 Wafer number U_ID[39:32] 0x486A Lot number U_ID[47:40] 0x486B U_ID[55:48] 0x486C U_ID[63:56] 0x486D U_ID[71:64] 0x486E U_ID[79:72] 0x486F U_ID[87:80] 0x4870 U_ID[95:88] |
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