ATMEGA644 datasheet(3/374 Pages) ATMEL

Il numero della parte	ATMEGA644

Spiegazioni elettronici	8-bit Microcontroller with 64K Bytes In- System Programmable Flash

PDF	374 Pages

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Produttore elettronici	ATMEL [ATMEL Corporation]

Homepage	http://www.atmel.com

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2593L–AVR–02/07

ATmega644

1.1

Disclaimer

Typical values contained in this datasheet are based on simulations and characterization of

other AVR microcontrollers manufactured on the same process technology. Min and Max values

will be available after the device is characterized.

Overview

The ATmega644 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 ATmega644

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

CPU

GND

VCC

RESET

Power

Supervision

POR / BOD &

RESET

Watchdog

Oscillator

Watchdog

Timer

Oscillator

Circuits /

Clock

Generation

XTAL1

XTAL2

PORT A (8)

PORT D (8)

PD7..0

PORT C (8)

PC7..0

TWI

SPI

EEPROM

JTAG

8bit T/C 0

8bit T/C 2

16bit T/C 1

SRAM

FLASH

USART 0

Internal

Bandgap reference

Analog

Comparator

A/D

Converter

PA7..0

PORT B (8)

PB7..0

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