ATmega640 Atmel Corporation, ATmega640 Datasheet - Page 441

• 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

2549N–AVR–05/11
11 Power Management and Sleep Modes ................................................. 52
12 System Control and Reset .................................................................... 59
13 I/O-Ports .................................................................................................. 70
14 Interrupts .............................................................................................. 105
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
10.10
10.11
10.12
10.13
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
12.1
12.2
12.3
12.4
12.5
13.1
13.2
13.3
13.4
Clock Systems and their Distribution ...............................................................40
Clock Sources .................................................................................................41
Low Power Crystal Oscillator ...........................................................................42
Full Swing Crystal Oscillator ............................................................................44
Low Frequency Crystal Oscillator ....................................................................45
Calibrated Internal RC Oscillator .....................................................................46
128 kHz Internal Oscillator ..............................................................................47
External Clock .................................................................................................48
Clock Output Buffer .........................................................................................49
Timer/Counter Oscillator ..................................................................................49
System Clock Prescaler ..................................................................................49
Register Description ........................................................................................50
Sleep Modes ....................................................................................................52
Idle Mode .........................................................................................................52
ADC Noise Reduction Mode ............................................................................53
Power-down Mode ...........................................................................................53
Power-save Mode ............................................................................................53
Standby Mode .................................................................................................54
Extended Standby Mode .................................................................................54
Power Reduction Register ...............................................................................54
Minimizing Power Consumption ......................................................................54
Register Description ........................................................................................56
Resetting the AVR ...........................................................................................59
Reset Sources .................................................................................................59
Internal Voltage Reference ..............................................................................62
Watchdog Timer ..............................................................................................63
Register Description ........................................................................................67
Introduction ......................................................................................................70
Ports as General Digital I/O .............................................................................71
Alternate Port Functions ..................................................................................75
Register Description for I/O-Ports ..................................................................100
ATmega640/1280/1281/2560/2561
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