ATAES132-TH-EQ-T Atmel, ATAES132-TH-EQ-T Datasheet - Page 112
ATAES132-TH-EQ-T
Manufacturer Part Number
ATAES132-TH-EQ-T
Description
EEPROM AES 32Kbit EE SPI
Manufacturer
Atmel
Datasheet
1.ATAES132-SH-EQ.pdf
(166 pages)
Specifications of ATAES132-TH-EQ-T
Rohs
yes
Maximum Clock Frequency
10 MHz
Operating Supply Voltage
6 V
Maximum Operating Temperature
- 40 C to + 85 C
Mounting Style
SMD/SMT
Package / Case
TSSOP-8
Interface Type
SPI
Factory Pack Quantity
4000
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I.13.
I.14.
I.15.
The OutMAC 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 OutMAC calculation.
Crunch Command
The Crunch command does not perform a cryptographic operation and does not use or generate a MAC.
DecRead Command
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.
Decrypt Command MAC
In normal decryption mode, the InMAC is calculated using the following 14 bytes in the default authenticate-only block:
2 bytes ManufacturingID
1 byte
1 byte
2 bytes Param1
2 bytes Param2
1 byte
4 bytes CountValue, the output parameter
1 byte
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
2 bytes ManufacturingID
1 byte
6 bytes FirstBlock field containing:
5 bytes 0x00
16 bytes SecondBlock field containing:
2 bytes ManufacturingID
1 byte
1 byte
2 bytes Param1
2 bytes Param2
1 byte
5 bytes 0x00
Counter Opcode (0x0A)
Mode
MacFlag
0x00
EncRead Opcode (0x04)
1 byte
2 bytes
2 bytes
1 byte
4 bytes
8 bytes
4 bytes
Decrypt Opcode (0x07)
Mode
MacFlag
Mode
Param1
Param2
MacFlag
Usage counter value, or 0x00 if not selected
SerialNum[0:7], or 0x00 if not selected
SmallZone[0:3], or 0x00 if not selected
Atmel ATAES132 Preliminary Datasheet
8760A−CRYPTO−5/11
112
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