ATAES132-SH-ER Atmel, ATAES132-SH-ER Datasheet - Page 23

• 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

6.
6.1.
Atmel ATAES132 Commands
Command Block and Packet
The host sends ATAES132 extended commands to the device in a block of at least nine bytes. The ATAES132 responses are
returned to the host in a block of at least four bytes.
Table 6-10. The command and response blocks are constructed in the following manner:
Table 6-11. The input command packet within the command block is constructed in the following manner:
Table 6-12. The response packet within the response block is constructed in the following manner:
Table 6-13. When an error occurs the response packet contains only an error code:
The host sends ATAES132 commands to the device by writing the command block to the Command Memory Buffer using a
standard SPI or I
Response Memory Buffer. The host retrieves the response by reading the response block using a standard SPI or I
command. If the host reads beyond the end of the block, then 0xFF is returned.
Byte #
0
1 to (N-3)
N-2, N-1
Byte #
1
2
3, 4
5, 6
7+
Byte #
1
2+
Byte #
1
2
C write command. ATAES132 processes the command packet and places the response block in the
Name
Count
Packet
Checksum
Name
Opcode
Mode
Param1
Param2
Data
Name
ReturnCode
Data
Name
ReturnCode
Meaning
Number of bytes to be transferred to the device in the block, including count, packet, and
checksum. This byte will always have a value of N.
Command, parameters and data, or response. Data is transmitted in the byte order
shown in the command definitions.
Atmel CRC-16 verification of the count and packet bytes. See Appendix M for additional
information and examples.
Meaning
The command code
Command modifier
First command parameter
Second command parameter
Optional input data
Meaning
The command return code (see Section 6.3)
Optional output data
Meaning
The error code (see Section 6.3)
Atmel ATAES132 Preliminary Datasheet
8760A−CRYPTO−5/11
2
C read
23