ATAES132-SH-ER-T Atmel, ATAES132-SH-ER-T Datasheet - Page 111

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

Specifications of ATAES132-SH-ER-T

• 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: 4000

I.10.
I.11.
I.12.
AuthCompute Command – Counter MAC
The counter command 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 calculations.
BlockRead Command
The BlockRead command does not perform a cryptographic operation and does not use or generate a MAC.
Counter 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 InMAC calculation.
2 bytes ManufacturingID
11 bytes FirstBlock field containing:
1 byte
16 bytes SecondBlock field containing:
2 bytes ManufacturingID
1 byte
11 bytes FirstBlock field containing
4 bytes Usage counter value for MAC generation key, 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
1 byte
1 byte
2 bytes
2 bytes
1 byte
4 bytes
Padding of value 0x00
4 bytes
8 bytes
4 bytes
Counter Opcode (0x0A)
1 byte
2 bytes
2 bytes
1 byte
4 bytes
1 byte
Counter Opcode (0x0A)
Mode
Param1
Param2
MacFlag
0x00
Usage counter value, or 0x00 if not selected
SerialNum[0:7], or 0x00 if not selected
SmallZone[0:3], or 0x00 if not selected
Mode
Param1
Param2
MacFlag
CountValue
0x00
Atmel ATAES132 Preliminary Datasheet
8760A−CRYPTO−5/11
111