ATmega644PR231 Atmel Corporation, ATmega644PR231 Datasheet - Page 380

• 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

26.2.11
8011O–AVR–07/10
Internal Oscillator Speed
Figure 26-80. BOD Threshold vs. Temperature (V
Figure 26-81. Watchdog Oscillator Frequency vs. Temperature
1.85
1.83
1.81
1.79
1.77
1.75
125
120
115
110
-60
-40
WATCHDOG OSCILLATOR FREQUENCY vs. TEMPERATURE
-40
-20
-20
0
0
Temperature (°C)
Temperature (°C)
20
20
ATmega164P/324P/644P
CC
40
= 1.8V)
40
Falling V
Rising V
60
60
CC
CC
80
80
2.1V
2.7V
3.3V
4.0V
5.5V
100
100
380