ATECC608B-LoRaWAN

5.2.2.1 Private Key - Stored in TempKey

The GenKey command can be used to generate an ephemeral ECC private key and place it in SRAM where there is no limit on writing to a memory location. This key cannot be read out but may be used by the ECDH command.

Table 5-42. Command Parameters
Opcode (1 Byte)	Mode (1 Byte)	KeyID (2 Bytes)	OtherData (3 Bytes)	Comment
0x40	0x04	0xFF FF	0x00 00 00	Private key stored in TempKey Public key generated and output on the bus

Table 5-43. Output Response GenKey Stored in TempKey
Name	Size	Response
Response	1 byte	If an ECC Fault code has been generated due to a command error
Response	64 bytes	Public keys X and Y coordinate the command’s success

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