ATmega644PR231 Atmel Corporation, ATmega644PR231 Datasheet - Page 135
ATmega644PR231
Manufacturer Part Number
ATmega644PR231
Description
Manufacturer
Atmel Corporation
Specifications of ATmega644PR231
Flash (kbytes)
64 Kbytes
Max. Operating Frequency
20 MHz
Max I/o Pins
32
Spi
3
Twi (i2c)
1
Uart
2
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Crypto Engine
AES
Sram (kbytes)
4
Eeprom (bytes)
2048
Operating Voltage (vcc)
1.8 to 3.6
Timers
3
Frequency Band
2.4 GHz
Max Data Rate (mb/s)
2
Antenna Diversity
Yes
External Pa Control
Yes
Power Output (dbm)
3
Receiver Sensitivity (dbm)
-101
Receive Current Consumption (ma)
13.2
Transmit Current Consumption (ma)
14.4
Link Budget (dbm)
104
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8111C–MCU Wireless–09/09
Bit
+0x83
Read/Write
Reset Value
AES_REQUEST
7
W
0
• Bits 3 - AES_DIR
This register bit sets the AES operation direction, either encryption or decryption.
Table 11-7.
• Bit [2:0] - Reserved
Register 0x94 (AES_CTRL_MIRROR):
Register 0x94 is a mirrored version of register 0x83 (AES_CTRL), for details refer to register
0x83 (AES_CTRL).
This register could be used to start a security operation within a single SRAM access by append-
ing it to the data stream and setting register bit AES_REQUEST = 1.
Register Bit
AES_DIR
R/W
6
0
AES Direction
AES_MODE
R/W
5
0
Value
0
1
Description
AES encryption (ECB, CBC)
AES decryption
R/W
4
0
AES_DIR
R/W
3
0
2
R
0
Reserved
1
R
0
AT86RF231
0
R
0
AES_CTRL
135
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