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ATECC608A 데이터시트(PDF) 44 Page - Microchip Technology

부품명 ATECC608A
상세설명  ATECC608A for LoRaWAN™ Data Sheet
PDF  81 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

ATECC608A 데이터시트(HTML) 44 Page - Microchip Technology

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Table 5-50. Command Parameters
Opcode
(1 Byte)
Mode
(1 Byte)
Key ID
(2 Bytes)
Data Field (128 Bytes)
Comment
Signature
(64 Bytes)
Public Key
(64 Bytes)
0x45
0x02
0x00 04
R value
S value
X value
Y value
Message stored in TempKey
0x22
0x00 04
R value
S value
X value
Y value
Message stored in Message Digest Buffer
0xA2
0x00 04
R value
S value
X value
Y value
• Message stored in TempKey
• System Nonce stored in MDB[31:0]
• Validation MAC is returned
0x82
0x00 04
R value
S value
X value
Y value
• Message stored in Message Digest Buffer
• System Nonce stored in MDB[63:32]
• Validation MAC is returned
Table 5-51. Output Response - Verify External
Name
Mode
Size
Response
Response 0x02 or 0x22
1 byte
• 0x00 - If signature is verified
• 0x01 - If signature does not match
• Error code - If there is a failure due to some other reason
0x82 or 0xA2
1 byte or 32 bytes
• Validation MAC - If signature is verified
• 0x01 - If signature does not match
• Error code - If there is a failure due to some other reason
Table 5-52. Validation MAC - Verify External
Size
(Bytes)
Message in TempKey
Message in Message Digest Buffer
32
Contents of the IO protection key
Contents of the IO protection key
32
Message stored in TempKey
Message stored in the first 32 bytes of the Message
Digest Buffer
32
System Nonce stored in the first 32 bytes of the
Message Digest Buffer
System Nonce stored in the second 32 bytes of the
Message Digest Buffer
32
R Data of the passed signature
R Data of the passed signature
32
S Data of the passed signature
S Data of the passed signature
1
Opcode
Opcode
1
Mode
Mode
2
Param2 [LSB,MSB]
Param2 [LSB,MSB]
5.2.4.2
Verify - Stored Public Key Mode
When using the Verify command in Stored mode, the public key to be used is stored in a data slot and does not
need to be passed. Prior to this command being run, the message should be written to TempKey or the Message
Digest Buffer using the Nonce command.
ATECC608A-TNGLoRaWAN
Device Commands
© 2020 Microchip Technology Inc.
Complete Datasheet
DS40002154B-page 44



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