ATmega644 Atmel Corporation, ATmega644 Datasheet - Page 21

• Manufacturer Part Number: ATmega644
• Manufacturer: Atmel Corporation

Specifications of ATmega644

• Flash (kbytes): 64 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 32
• Ext Interrupts: 32
• Usb Speed: No
• Usb Interface: No
• Spi: 3
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

9.5
9.6
9.7
9.8
9.9
9.10
2593NS–AVR–07/10
Rev. 2593J - 09/06
Rev. 2593I - 08/06
Rev. 2593H - 07/06
Rev. 2593G - 06/06
Rev. 2593F - 04/06
Rev. 2593E - 04/06
1.
2.
3.
4.
5.
1.
2.
3.
1.
2.
3.
4.
1.
2.
3.
1.
2.
3.
1.
Updated
Updated
Updated
Updated
Updated
14-4 on page
page 147
Updated note in
Updated
Updated
Updated
Updated
Updated
Updated
Updated
Updated
Updated
Updated typos.
Updated
Updated
Updated
”Calibrated Internal RC Oscillator” on page
”Fast PWM Mode” on page
”Device Identification Register” on page
”Signature Bytes” on page
Table 13-3 on page 97,Table 13-6 on page
Table 7-2 on page
”Timer/Counter Prescaler” on page
”Fast PWM Mode” on page
Figure 14-7 on page
Table 24-7 on page
”Packaging Information” on page
”Calibrated Internal RC Oscillator” on page
”OSCCAL – Oscillator Calibration Register” on page
Table 26-1 on page
”ADC Noise Reduction Mode” on page
”Power-down Mode” on page
”Calibrated Internal RC Oscillator” on page
and
126,
Table 15-8 on page
”Pin Configurations” on page
Table 14-5 on page
29,
280.
319.
118.
Table 12-11 on page 80
148.
287.
117.
117.
40.
127,
362.
145.
2.
Table 15-3 on page
40.
260.
98,
33.
33.
33.
Table 14-3 on page
and
Table 24-7 on page
37.
ATmega644
146,
Table 15-6 on
126,
Table
280.
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