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The ATMEGA644PA-MU is a microcontroller from Microchip Technology based on the AVR RISC architecture. Below are its specifications, descriptions, and features:

Manufacturer:

• MICROCHIP

Specifications:

• Core: 8-bit AVR
• Flash Memory: 64KB
• SRAM: 4KB
• EEPROM: 2KB
• Clock Speed: Up to 20 MHz
• Operating Voltage: 1.8V – 5.5V
• Package: QFN-44 (7x7mm)
• I/O Pins: 32
• ADC Channels: 8 (10-bit resolution)
• Timers:
• 2x 8-bit timers
• 2x 16-bit timers
• PWM Channels: 6
• Communication Interfaces:
• USART (2x)
• SPI
• I²C (TWI)
• Watchdog Timer: Yes
• Power-on Reset (POR) & Brown-out Detection (BOD): Yes
• Operating Temperature Range: -40°C to +85°C

Descriptions:

The ATMEGA644PA-MU is a low-power, high-performance microcontroller with picoPower technology, making it suitable for battery-operated and energy-efficient applications. It features a rich peripheral set, including ADC, PWM, USART, SPI, and I²C, making it ideal for embedded control applications.

Features:

• Advanced RISC Architecture (131 instructions, mostly single-cycle execution)
• Low Power Consumption (Active, Idle, and Power-down modes)
• On-chip Debug Interface (debugWIRE)
• Self-Programmable Flash Memory
• Internal Calibrated Oscillator
• JTAG Interface for Programming & Debugging
• Wide Operating Voltage (1.8V – 5.5V)
• High Endurance Non-Volatile Memory

This microcontroller is commonly used in industrial control, automation, consumer electronics, and IoT applications.

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