ATMEGA644P-20AU

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ATMEGA644P-20AU

IC MCU 8BIT 64KB FLASH 44TQFP

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Specifications

Package Tray
Series AVR® ATmega
ProductStatus Active
CoreProcessor AVR
CoreSize 8-Bit
Speed 20MHz
Connectivity I²C, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
NumberofI/O 32
ProgramMemorySize 64KB (32K x 16)
ProgramMemoryType FLASH
EEPROMSize 2K x 8
RAMSize 4K x 8
Voltage-Supply(Vcc/Vdd) 2.7V ~ 5.5V
DataConverters A/D 8x10b
OscillatorType Internal
OperatingTemperature -40°C ~ 85°C (TA)
MountingType Surface Mount
Package/Case 44-TQFP

Overview

Description

The ATmega644P-20AU is an 8-bit microcontroller from Atmel’s AVR family, widely used in embedded systems. It features a RISC architecture, enabling high-speed processing with a maximum clock speed of 20 MHz. The microcontroller has 64 KB of flash memory for program storage, 4 KB of SRAM, and 2 KB of EEPROM for non-volatile data retention.
Key features include 32 general-purpose I/O pins, six 10-bit ADC channels, three timer/counter modules, and USART for serial communication. The ATmega644P-20AU supports various operating voltages (1.8V to 5.5V) and is suitable for low-power applications, making it ideal for battery-operated devices.
It can be programmed using AVR-GCC or Arduino IDE, benefiting from a robust ecosystem of libraries and community support. Its versatility and ease of integration make the ATmega644P-20AU a popular choice for hobbyists and professionals alike in projects ranging from robotics to sensor systems.

Features

The ATmega644P-20AU is an 8-bit microcontroller from Atmel's AVR family, featuring the following key specifications:
1. Architecture: AVR 8-bit RISC architecture.
2. Operating Frequency: Up to 20 MHz.
3. Flash Memory: 64 KB of in-system programmable flash memory.
4. SRAM: 4 KB of SRAM.
5. EEPROM: 2 KB of EEPROM for non-volatile data storage.
6. I/O Ports: 32 general-purpose I/O pins.
7. Timers: Three 16-bit timers/counters with PWM support.
8. ADC: 10-bit, 8-channel Analog-to-Digital Converter (ADC).
9. Communication Interfaces: USART, SPI, and I2C (TWI) for serial communication.
10. Interrupts: 23 external and internal interrupt sources.
11. Power Management: Various sleep modes to optimize power consumption.
12. Package: Available in a 40-pin PDIP and other surface-mount packages.
This combination of features makes the ATmega644P-20AU suitable for a wide range of applications in embedded systems, robotics, and automation.

Package

The ATMEGA644P-20AU is packaged in a TQFP (Thin Quad Flat Package) form factor with 32 pins. Its dimensions are 7 mm x 7 mm, and it is suitable for surface mounting.

Pinout

The ATmega644P-20AU is an 8-bit AVR microcontroller with a total of 32 pins. It features a 40-pin dual in-line package (DIP) configuration. The functions of these pins include:
1. Digital I/O: 23 pins can be used for general-purpose input/output (GPIO).
2. Analog Inputs: 8 pins serve as analog-to-digital converter (ADC) inputs.
3. Communication Interfaces:
- 1 UART (USART) for serial communication.
- 1 SPI interface for synchronous communication.
- 1 I2C (TWI) interface for multi-master communication.
4. Timers: 3 timer/counter modules for timing operations and waveform generation.
5. External Interrupts: 6 pins can be configured for external interrupts.
6. Reset Pin: 1 pin for resetting the microcontroller.
The ATmega644P-20AU operates at a maximum clock speed of 20 MHz and is suitable for various embedded applications.

Manufacturer

The ATMEGA644P-20AU is manufactured by Microchip Technology Inc., a prominent semiconductor company. Microchip specializes in producing microcontrollers, analog semiconductors, and memory products. Founded in 1989, the company is known for its focus on embedded control applications and provides a wide range of solutions for various industries, including automotive, industrial, consumer, and communications. Microchip's products are widely used in electronics design and development, emphasizing reliability and low power consumption. The ATMEGA644P-20AU is part of the AVR microcontroller family, which features an 8-bit architecture and is popular among hobbyists and professionals for its ease of use and robust performance.

Application

The ATmega644P-20AU microcontroller is commonly used in various applications, including embedded systems, robotics, home automation, sensor interfacing, data acquisition, and motor control. Its versatile GPIO pins, built-in ADC, and communication interfaces (I2C, SPI, UART) make it suitable for projects in industrial automation, consumer electronics, and educational purposes. Additionally, it can be employed in DIY electronics and prototyping.

Equivalent

Equivalent products to the ATmega644P-20AU include the ATmega1284P, ATmega32U4, and ATmega2560, which offer similar architecture and features. Additionally, the PIC16F877A and PIC18F4550 from Microchip can serve as alternatives, depending on specific application requirements. Always verify compatibility in terms of pin configuration, memory, and peripherals for specific projects.

Shipping

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DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

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