ATMEGA644A-PU Microchip 8bit MCU

ATMEGA644A-PU Overview

AVR AVR® ATmega Microcontroller IC 8-Bit 20MHz 64KB (32K x 16) FLASH 40-PDIP

ECAD Model

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Features

High-performance, Low-power AVR 8-bit Microcontroller

Advanced RISC Architecture

131 Powerful InstructionsMost Single-clock Cycle Execution

32 x 8 General Purpose Working Registers

Fully Static Operation

Up to 20 MIPS Throughput at 20 MHz

On-chip 2-cycle Multiplier

High Endurance Non-volatile Memory segments

16/32/64/128K Bytes of In-System Self-programmable Flash program memory

512B/1K/2K/4K Bytes EEPROM

1/2/4/16K Bytes Internal SRAM

Write/Erase Cycles: 10,000 Flash/ 100,000 EEPROM

Data retention: 20 years at 85C/ 100 years at 25C(1)

Optional Boot Code Section with Independent Lock Bits

In-System Programming by On-chip Boot Program

True Read-While-Write Operation

Programming Lock for Software Security

JTAG (IEEE std. 1149.1 Compliant) Interface

Boundary-scan Capabilities According to the JTAG Standard

Extensive On-chip Debug Support

Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface

Peripheral Features

Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes

One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode

Real Time Counter with Separate Oscillator

Six PWM Channels

8-channel, 10-bit ADC

Differential mode with selectable gain at 1x, 10x or 200x

Byte-oriented Two-wire Serial Interface

Two Programmable Serial USART

Master/Slave SPI Serial Interface

Programmable Watchdog Timer with Separate On-chip Oscillator

On-chip Analog Comparator

Interrupt and Wake-up on Pin Change

Special Microcontroller Features

Power-on Reset 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

I/O and Packages

32 Programmable I/O Lines

40-pin PDIP, 44-lead TQFP, 44-pad VQFN/QFN/MLF

44-pad DRQFN

49-ball VFBGA

Operating Voltages

1.8 - 5.5V

Speed Grades

0 - 4 MHz @ 1.8 - 5.5V

0 - 10 MHz @ 2.7 - 5.5V

0 - 20 MHz @ 4.5 - 5.5V

Power Consumption at 1 MHz, 1.8V, 25C

Active: 0.4 mA

Power-down Mode: 0.1A

Power-save Mode: 0.6A (Including 32 kHz RTC)

Applications

AVR? ATmega

Specifications

Core Processor AVR
DigiKey Programmable Not Verified
Speed 20MHz
Operating Temperature -40℃ ~ 85℃ (TA)
Program Memory Type FLASH
RAM Size 4K x 8
Number of I/O 32
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Mounting Type Through Hole
Product Status Active
Oscillator Type Internal
Supplier Device Package 40-PDIP
EEPROM Size 2K x 8
Series AVR® ATmega
Package / Case 40-DIP (0.600, 15.24mm)
Core Size 8-Bit
Mfr Microchip Technology
Connectivity I2C, SPI, UART/USART
Program Memory Size 64KB (32K x 16)
Data Converters A/D 8x10b
Package Tube
Voltage - Supply (Vcc/Vdd) 1.8V ~ 5.5V
Base Product Number ATMEGA644

ATMEGA644A-PU

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ATMEGA644A-PU Overview

ECAD Model

Features

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