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ATMEGA644 Programming Manual

Part Series:ATMEGA644 Series
Category:8 Bit Microcontroller
Description:RISC Microcontroller, 8Bit, FLASH, AVR RISC CPU, 20MHz, CMOS, PQFP44, 10 X 10MM, 1MM HEIGHT, 0.8MM PITCH, GREEN, PLASTIC, MS-026ACB, TQFP-44
Document:ATMEGA644PA-AU Programming Manual (660 Pages)

ATMEGA644 Programming Manual 8 Bit Microcontroller

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ATMEGA644PA-AU - ATMEL Specifications

TYPE
DESCRIPTION
Mounting Style
Surface Mount
Frequency
20 MHz
Number of Pins
44 Pin
Supply Voltage (DC)
1.80V (min)
Operating Voltage
1.8V ~ 5.5V
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ATMEGA644PA-AU - ATMEL Function Overview

The ATMEGA644PA-AU is a 8-bit high-performance picoPower AVR RISC-based Microcontroller combines 64kB ISP flash memory with read-while-write capabilities, 2kB EEPROM, 4kB SRAM, 32 general purpose I/O lines, 32 general purpose working registers, a real time counter, three flexible timer/counters with compare modes and PWM, two USARTs, a byte oriented 2-wire serial interface, an 8-channel 10-bit A/D converter with optional differential input stage with programmable gain, programmable watchdog timer with internal oscillator, SPI serial port, a JTAG (IEEE 1149.1 compliant) test interface for on-chip debugging and programming and six software selectable power saving modes. The device operates between 1.8 to 5.5V. By executing powerful instructions in a single clock cycle, the device achieves throughputs approaching 1 MIPS per MHz, balancing power consumption and processing speed.
Advanced RISC architecture - On-chip 2-cycle multiplier
High endurance, non-volatile memory segments
QTouch® library support - Capacitive touch buttons, sliders and wheels
JTAG (IEEE 1149.1 compliant) interface
Peripheral features - Real time counter with separate oscillator
Power-on reset (POR) and programmable brown-out detection
Internal calibrated RC oscillator
External and internal interrupt sources
Six sleep modes - Idle, ADC noise reduction, power-save, power-down, standby and extended standby
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