ATMEGA644P-20MU

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ATMEGA644P-20MU

IC MCU 8BIT 64KB FLASH 44VQFN

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規格

Supplier Microchip Technology
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-VFQFN Exposed Pad

概述

Description

ATmega644P-20MU is an 8-bit AVR microcontroller from Atmel (Microchip). It uses the AVR RISC core and runs up to 20 MHz.
Key specs (typical):
- Program memory: 64 KB Flash; SRAM: ~4 KB; EEPROM: ~4 KB
- I/O: about 32 general-purpose I/O pins
- Peripherals: 8-channel 10-bit ADC; 3 timers (including a 16-bit Timer1) with PWM; USART/UART; SPI; I2C (TWI)
- Power: operates from 1.8 to 5.5 V
- Features: watchdog timer, brown-out detection, multiple sleep modes for low power
Packaging:
- The -MU suffix indicates a 44-pin surface-mount package (µQFP). Other packages may be available.
Typical use:
- Embedded control, data acquisition, sensor interfacing, motor control, hobbyist robotics.
Development:
- Supported by AVR-GCC toolchain, Atmel/Microchip Studio, and other IDEs with standard AVR headers and libraries.

Features

Concise features of ATMEGA644P-20MU:
- 8-bit AVR RISC CPU, up to 20 MHz operation
- Memory: 64 KB flash, 4 KB SRAM, 2 KB EEPROM
- I/O: 32 general-purpose I/O lines (Ports A–D)
- ADC: 8-channel, 10-bit ADC
- Timers/PWM: Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit) with PWM outputs on multiple pins
- Communication: USART, SPI, I2C (TWI)
- Peripherals: Analog comparator, Watchdog Timer, Brown-out detector
- In-system programming: SPI programming (ISP); supports bootloader
- Power modes: Sleep modes including Idle, ADC Noise Reduction, Power-down, Standby
- Package: 44-pin LQFP (MU) form factor
- Operating voltage: typically 1.8–5.5 V, with 20 MHz max frequency
Note: Exact package and voltage ranges may vary by variant; this is the common feature set for ATmega644P-20MU.

Package

It comes in a 40-pin Small Outline Integrated Circuit (SOIC-40) package (the MU variant).

Pinout

- Pin count: 40 pins (ATmega644P in MU 40-pin package).
- Function: 8-bit AVR microcontroller with 64 KB Flash, 4 KB SRAM, 2 KB EEPROM; runs up to 20 MHz; includes ADC, timers, PWM, and serial interfaces (USART/SPI/TWI) with GPIOs.

Manufacturer

- Manufacturer: Microchip Technology Inc. (the Atmel AVR line, including ATmega644P, became Microchip after Microchip acquired Atmel).
- What kind of company: An American multinational semiconductor company that designs, manufactures, and sells microcontrollers, memory, and analog/other semiconductor products for embedded systems.

Application

Applications areas for ATMEGA644P-20MU:
- Mid-range embedded control for consumer electronics, home automation, and robotics
- Data logging and instrumentation (sensor data capture, measurement devices)
- Industrial automation and sensor interfacing
- Prototyping, education, and hobby projects needing more flash/memory
- General-purpose I/O heavy applications requiring ADC, PWM, timers, and multiple serial interfaces (USART/SPI/I2C) at up to 20 MHz

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