ATECC508A datasheet(57/109 Pages) MICROCHIP

57 / 109 page

State Description

Error/

Status

Description

Watchdog About to Expire

0xEE

There is insufficient time to execute the given command before the

watchdog timer will expire. The system must reset the watchdog timer by

entering the idle or sleep modes.

CRC or Other

Communications Error

0xFF

Command was not properly received by ATECC508A and should be

re-transmitted by the I/O driver in the system. No attempt was made to

parse or execute the command.

9.1.3

Command Opcodes, Short Descriptions, and Execution Times

During parsing of the parameters and subsequent execution of a properly received command, the device

will be busy and not respond to transitions on the pins. The interval during which the device will be busy

varies depending upon the command and its parameter values, the state of the device, the environmental

conditions, and other factors according to the following table:

Table 9-4. Command Opcodes, Short Descriptions, and Execution Time

Command

Opcode Description

Typ. Exec.

Time(1)

Max. Exec.

Time(2)

Unit

CheckMac

0x28

Verify a MAC calculated on another CryptoAuthentication

device.

Counter

0x24

Read or increment one of the monotonic counters

DeriveKey

0x1C

Derive a target key value from the target or parent key.

ECDH

0x43

Generate an ECDH master secret using stored private

key and input public key.

GenDig

0x15

Generate a data digest from a random or input seed and

a key.

GenKey

0x40

Generate an ECC public key. Optionally generate an ECC

private key.

115

HMAC

0x11

Calculate response from key and other internal data using

HMAC/SHA-256.

Info

0x30

Return device state information.

0.1

Lock

0x17

Prevent further modifications to a zone of the device.

MAC

0x08

Calculate response from key and other internal data using

SHA-256.

Nonce

0x16

Generate a 32-byte random number and an internally

stored Nonce.

0.1

Pause

0x01

Selectively put just one device on a shared bus into the

idle mode.

0.1

PrivWrite

0x46

Write an ECC private key into a slot in the Data zone.

0.8

Random

0x1B

Generate a random number.

Read

0x02

Read four bytes from the device, with or without

authentication and encryption.

0.1

Sign

0x41

ECDSA signature calculation.

ATECC508A

Security Commands

Datasheet Complete

DS20005927A-page 57

ATECC508A датащи(PDF) 57 Page - Microchip Technology

ATECC508A датащи(HTML) 57 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL