ATmega640 Atmel Corporation, ATmega640 Datasheet - Page 404

• Manufacturer Part Number: ATmega640
• Manufacturer: Atmel Corporation

Specifications of ATmega640

• Flash (kbytes): 64 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 86
• Ext Interrupts: 32
• Usb Speed: No
• Usb Interface: No
• Spi: 5
• Twi (i2c): 1
• Uart: 4
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 8
• Eeprom (bytes): 4096
• 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: 6
• Output Compare Channels: 16
• Input Capture Channels: 4
• Pwm Channels: 15
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

32.10 Internal Oscillator Speed
2549N–AVR–05/11
Figure 32-35. Watchdog Oscillator Frequency vs. V
Figure 32-36. Watchdog Oscillator Frequency vs. Temperature
128
126
124
122
120
118
116
114
128
126
124
122
120
118
116
114
-60
2
-40
2.5
-20
ATmega640/1280/1281/2560/2561
3
0
3.5
Temperature (°C)
V
CC
20
(V)
CC
4
40
4.5
60
5
80
2.1V
2.7V
3.3V
4.0V
5.5V
100
5.5
-40°C
25°C
85°C
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