ATAES132-TH-EQ Atmel, ATAES132-TH-EQ Datasheet - Page 88

• Manufacturer Part Number: ATAES132-TH-EQ
• Description: EEPROM AES 32Kbit EE SPI
• Manufacturer: Atmel

Specifications of ATAES132-TH-EQ

• 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: 2300

E.2.17. TempCal Register
E.2.18. TempOffset Register
E.2.19. RFU Registers
Table E-13. Coding of the PowerUpState bits in the ChipConfig register
The ChipConfig.PowerUpState bits are used to configure the behavior of the ATAES132 at initial power up. Table E-6 shows
the definition of the ChipConfig.PowerUpState bits. See Appendix L for detailed information regarding the ATAES132 power
management functions.
The default value of the ChipConfig register is 0xC3. In this configuration, the ATAES132 goes to the active state at power up,
the encrypt, decrypt and legacy commands are enabled.
The TempCal register contains a value indicating the calibration procedure used to determine the TempOffset register value at
the factory. The temperature sensor calibration procedure determines the accuracy of the die temperature measurement. The
default value of TempCal is 0x00.
Table E-14. TempCal register definition
Note:
The customer can write the TempCal register with the standard I
has been locked (see the LockConfig register definition in Section E.2.11).
TempOffset is an eight byte register that contains a temperature offset value which is used to calculate the die temperature
measured by the high-accuracy internal sensor. The customer can write the TempOffset register with the standard I
write commands unless the configuration memory has been locked (see the LockConfig register definition in Section E.2.11).
The default TempOffset register value programmed by Atmel at the factory is determined by characterization, as indicated by a
TempCal register value of 0x00. Only the first two bytes of the TempOffset register are used to calculate the die temperature
when the TempCal register value is 0x00. See Section 7.25 for the temperature calculation.
It is possible to substantially improve the accuracy of the temperature sensor by measuring the temperature offset for each
unit, and overwriting the TempOffset register with the new offset value during personalization. Contact Atmel for calibrated
temperature sensor information.
Any configuration memory locations which are identified as RFU in Table E-1, memory map, are registers in customer writable
memory that are reserved by Atmel for future use (in a future ATAES family product or a major product revision). The default
value of the RFU registers is 0xFF.
The customer can write the RFU registers with the standard I
been locked (see the LockConfig register definition in Section E.2.11). The RFU registers should only be programmed to
0xFF; all other values are prohibited.
TempCal Value
0x00
0x01
0xFF
Bit 7
1
1
0
0
1.
The die temperature accuracy specifications are listed in Table 9-8
Description
Uncalibrated temperature sensor
Calibrated temperature sensor, procedure 1
Temperature sensor Offset unknown
Bit 6
1
0
1
0
Description
Device goes to the Active State at Power Up
Device goes to the Standby State at Power Up
Device goes to the Sleep State at Power Up
2
C or SPI write commands unless the configuration memory has
2
C or SPI write commands unless the configuration memory
Atmel ATAES132 Preliminary Datasheet
Accuracy(1)
TACCY
TACCY.CAL1
N/A
8760A−CRYPTO−5/11
TempOffset
2 bytes
N/A
2
C or SPI
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