ATMEGA32U2-MU Series

series introduction

# ATMEGA32U2 - MU Product Series Introduction

## 1. Overview
The ATMEGA32U2 - MU is a remarkable product series within the microcontroller domain, developed by Microchip Technology. These microcontrollers are based on the high - performance AVR® 8 - bit RISC architecture, offering a perfect blend of power, flexibility, and ease - of - use. They are specifically designed to meet the diverse needs of various embedded applications, from consumer electronics to industrial control systems.

## 2. Key Features

### 2.1 Processor Core
- **AVR RISC Architecture**: The ATMEGA32U2 - MU is built around an AVR 8 - bit RISC CPU. This architecture provides a large number of general - purpose working registers, which allows for efficient execution of instructions. With a single clock cycle execution time for most instructions, it can achieve a throughput of up to 1 MIPS per MHz, enabling real - time operation and high - speed data processing.
- **Harvard Architecture**: It utilizes the Harvard architecture, which separates the program memory and data memory. This allows for simultaneous access to both program and data, enhancing the overall performance and efficiency of the microcontroller.

### 2.2 Memory
- **Flash Program Memory**: The series comes with 32 KB of in - system self - programmable Flash memory. This non - volatile memory is used to store the program code, and it can be easily reprogrammed during development or in the field, providing flexibility for product updates and improvements.
- **SRAM**: There is 2.5 KB of internal SRAM available for data storage. This SRAM is used to store variables, buffers, and intermediate results during program execution, ensuring fast access to data and smooth operation of the microcontroller.
- **EEPROM**: An on - chip EEPROM of 1 KB is provided. EEPROM is non - volatile memory that can be used to store critical data such as calibration values, configuration settings, and user preferences. It can be written and erased a large number of times, making it suitable for long - term data storage.

### 2.3 Peripherals

#### 2.3.1 USB Interface
- **Full - Speed USB 2.0**: One of the standout features of the ATMEGA32U2 - MU is its integrated full - speed USB 2.0 interface. This allows the microcontroller to communicate directly with a host computer or other USB - enabled devices without the need for an external USB controller. It supports various USB classes such as Human Interface Device (HID), Mass Storage Device (MSD), and Communication Device Class (CDC), making it ideal for applications like USB keyboards, mice, and serial communication devices.
- **USB On - The - Go (OTG)**: Some models in the series support USB OTG functionality, which enables the microcontroller to act as both a USB host and a device. This provides additional flexibility in system design, allowing for direct communication between different USB devices without the need for a computer.

#### 2.3.2 Timers/Counters
- **Multiple Timers**: The ATMEGA32U2 - MU is equipped with multiple timers and counters, including two 8 - bit timers/counters and one 16 - bit timer/counter. These timers can be used for a variety of purposes, such as generating accurate time delays, measuring time intervals, and generating Pulse Width Modulation (PWM) signals.
- **PWM Capability**: The PWM functionality of the timers is particularly useful for applications such as motor control, LED dimming, and audio signal generation. It allows for precise control of the duty cycle of the output signal, enabling smooth and efficient operation of external devices.

#### 2.3.3 Serial Communication

Images for reference

32-QFN PKG

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Datasheets

Partlist

ATMEGA32U2-MU

ATMEGA32U2-MUR