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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATECC508A датащи(PDF) 92 Page - Microchip Technology |
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ATECC508A датащи(HTML) 92 Page - Microchip Technology |
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92 / 109 page  match that in SlotConfig.WriteKey. Prior to data locking, any key can be used to generate TempKey and the GenDigData bit is ignored. The KeyConfig.ReqRandom, KeyConfig.ReqAuth and KeyConfig.AuthKey are ignored by this command because they will have been checked by the GenDig command for the parent encrypting key. When performing an encrypted Write to a partial block at the end of slots 0 through 7 and 9 through 15, all 32 bytes of input must be sent to the device, with the unused bits being used only as part of the MAC calculation. Their value will not affect the final contents of the EEPROM. Table 9-56. Input Parameters Name Size Notes Opcode Write 1 0x12 Param1 Zone 1 Bit 7: 0 = 4 bytes will be written. 1 = 32 bytes will be written. Bit 6: 0 = The input data is in the clear. 1 = The input data has been encrypted. This bit is ignored after the Data zone is locked. Bits 5–2: Must be zero. Bits 1–0: Select among Config, OTP or Data. See Section Zone Encoding. Param2 Address 2 Address of first word to be written within the zone. See Section Address Encoding. Data_1 Value 4 or 32 Information to be written to the zone. May be encrypted. Data_2 MAC 0 or 32 Message authentication code to validate address and data. Table 9-57. Output Parameter Name Size Notes Success 1 Upon successful completion, ATECC508A returns a value of zero. ATECC508A Security Commands © 2017 Microchip Technology Inc. Datasheet Complete DS20005927A-page 92 |
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