ATAES132-SH-ER Atmel, ATAES132-SH-ER Datasheet - Page 119

• Manufacturer Part Number: ATAES132-SH-ER
• Description: EEPROM AES 32Kbit EE I2C
• Manufacturer: Atmel

Specifications of ATAES132-SH-ER

• Rohs: yes
• Maximum Clock Frequency: 1 MHz
• Operating Supply Voltage: 6 V
• Maximum Operating Temperature: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8
• Interface Type: I2C
• Factory Pack Quantity: 2300

I.27.
I.28.
I.29.
I.30.
KeyLoad Command MAC
The InMAC is calculated using the following 14 bytes in the default authenticate-only block:
If any of the optional authenticate fields are selected in the mode parameter, then a second authenticate-only block is included
in the MAC calculation.
KeyTransfer Command
The KeyTransfer command does not perform a cryptographic operation and does not use or generate a MAC.
Legacy Command
The legacy command executes a single block of the AES engine with no input or output formatting. This is known as ECB
mode, and can be used to perform various AES encryption and/or authentication operations. This command does not use the
nonce register value in the computation since the entire 16 byte AES engine input value comes from the input packet.
Lock Command MAC
If required due to the value of the mode parameter and ZoneConfig[UZ].WriteMode, the MAC is calculated using the following
14 bytes in the default authenticate-only block:
If any of the optional authenticate fields are selected in the mode parameter, then a second authenticate-only block is included
in the MAC calculation.
The AES key used for the MAC calculation is that specified in ZoneConfig[Zone].WriteID
2 bytes ManufacturingID
1 byte
6 bytes FirstBlock field containing:
5 bytes 0x00
4 bytes Usage counter value, or 0x00 if not selected
8 bytes SerialNum[0:7], or 0x00 if not selected
4 bytes SmallZone[0:3], or 0x00 if not selected
2 bytes ManufacturingID
1 byte
1 byte
2 bytes Param1
2 bytes Param2
1 byte
5 bytes 0x00
4 bytes Usage counter value, or 0x00 if not selected
8 bytes SerialNum[0:7], or 0x00 if not selected
4 bytes SmallZone[0:3], or 0x00 if not selected
KeyLoad Opcode (0x09)
1 byte
2 bytes
2 bytes
1 byte
Lock Opcode (0x0D)
Mode
MacFlag
Mode
Param1
Param2
MacFlag
Atmel ATAES132 Preliminary Datasheet
8760A−CRYPTO−5/11
119