ATmega1280 Atmel Corporation, ATmega1280 Datasheet - Page 86

• Manufacturer Part Number: ATmega1280
• Manufacturer: Atmel Corporation

Specifications of ATmega1280

• Flash (kbytes): 128 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

13.3.5
2549N–AVR–05/11
Alternate Functions of Port E
The Port E pins with alternate functions are shown in
Table 13-15. Port E Pins Alternate Functions
Note:
• INT7/ICP3/CLKO – Port E, Bit 7
INT7, External Interrupt source 7: The PE7 pin can serve as an external interrupt source.
ICP3, Input Capture Pin 3: The PE7 pin can act as an input capture pin for Timer/Counter3.
CLKO - Divided System Clock: The divided system clock can be output on the PE7 pin. The
divided system clock will be output if the CKOUT Fuse is programmed, regardless of the
PORTE7 and DDE7 settings. It will also be output during reset.
• INT6/T3 – Port E, Bit 6
INT6, External Interrupt source 6: The PE6 pin can serve as an external interrupt source.
T3, Timer/Counter3 counter source.
• INT5/OC3C – Port E, Bit 5
INT5, External Interrupt source 5: The PE5 pin can serve as an External Interrupt source.
OC3C, Output Compare Match C output: The PE5 pin can serve as an External output for the
Timer/Counter3 Output Compare C. The pin has to be configured as an output (DDE5 set “one”)
to serve this function. The OC3C pin is also the output pin for the PWM mode timer function.
Port Pin
PE7
PE6
PE5
PE4
PE3
PE2
PE1
PE0
1. Only for ATmega1281/2561. For ATmega640/1280/2560 these functions are placed on
MISO/MOSI pins.
(External Interrupt 7 Input, Timer/Counter3 Input Capture Trigger or Divided System Clock)
(External Interrupt 5 Input or Output Compare and PWM Output C for Timer/Counter3)
(External Interrupt4 Input or Output Compare and PWM Output B for Timer/Counter3)
(Analog Comparator Negative Input or Output Compare and PWM Output A for
(Programming Data Input, USART0 Receive Pin or Pin Change Interrupt 8)
(Analog Comparator Positive Input or USART0 external clock input/output)
(External Interrupt 6 Input or Timer/Counter3 Clock Input)
(Programming Data Output or USART0 Transmit Pin)
ATmega640/1280/1281/2560/2561
PDI
Alternate Function
INT7/ICP3/CLK0
Timer/Counter3)
(1)
PDO
INT5/OC3C
INT4/OC3B
AIN1/OC3A
AIN0/XCK0
/RXD0/PCINT8
INT6/ T3
(1)
Table
/TXD0
13-15.
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