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(Datasheet) ATMEGA1281V

8-bit Atmel Microcontroller

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ATMEGA1281V pdf
2. Overview
The ATmega640/1280/1281/2560/2561 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced
RISC architecture. By executing powerful instructions in a single clock cycle, the
ATmega640/1280/1281/2560/2561 achieves throughputs approaching 1 MIPS per MHz allowing the system
designer to optimize power consumption versus processing speed.
2.1 Block Diagram
Figure 2-1. Block Diagram
VCC
PF7..0
PK7..0
PJ7..0
PE7..0
RESET
GND
XTAL1
XTAL2
PA7..0
PG5..0
Power
Supervision
POR/ BOD &
RESET
Watchdog
Timer
Watchdog
Oscillator
Oscillator
Circuits /
Clock
Generation
PORTA (8)
PORT G (6)
PORT F (8)
PORT K (8)
PORT J (8)
PORT E(8)
JTAG
EEPROM
XRAM
A/D
Converter
Internal
Bandgap reference
CPU
Analog
Comparator
16 bit T/C3
16 bit T/C5
16 bit T/C4
FLASH
SRAM
16 bit T/C1
USART 0
USART 3
USART 1
PC7..0
PORT C (8)
TWI
SPI
8 bit T/C0
8 bit T/C2
USART 2
NOTE:
Shaded parts only available
in the 100-pin version.
Complete functionality for
the ADC,T/C4, and T/C5 only
available in the 100-pin version.
PORTD (8)
PORT B (8)
PORTH (8)
PORTL (8)
PD7..0
PB7..0
PH7..0
PL7..0
The Atmel® AVR® core combines a rich instruction set with 32 general purpose working registers. All the 32 regis-
ters are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in
one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving
throughputs up to ten times faster than conventional CISC microcontrollers.
ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]
2549Q–AVR–02/2014
5
ATMEL
ATMEL


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