ATmega644PR231 Atmel Corporation, ATmega644PR231 Datasheet - Page 382

• Manufacturer Part Number: ATmega644PR231
• 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

8011O–AVR–07/10
Figure 26-84. Calibrated 8 MHz RC Oscillator vs. Temperature
Figure 26-85. Calibrated 8 MHz RC Oscillator vs. OSCCAL Value
8.2
8.1
7.9
7.8
CALIBRATED 8 MHz RC OSCILLATOR FREQUENCY vs. OSCCAL VALUE
16
14
12
10
8
8
6
4
2
0
-60
0
16
-40
32
48
-20
64
80
96
0
112
OSCCAL (X1)
Temperature (°C)
128
20
ATmega164P/324P/644P
144
160
40
176
192
60
208
224
80
5.0V
3.0V
240
100
256
-40°C
85°C
25°C
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