ATSAM3U4EA-CU Series

series introduction

# Introduction to the ATSAM3U4EA - CU Product Series

## 1. Overview
The ATSAM3U4EA - CU is a remarkable product series within the realm of microcontrollers, developed by Microchip Technology. These microcontrollers are engineered to offer high - performance, low - power operation, and a rich set of features, making them suitable for a wide range of applications across various industries.

## 2. Key Features

### 2.1 Processor Core
- **ARM Cortex - M3 Core**: The ATSAM3U4EA - CU is based on the ARM Cortex - M3 processor core. This core is known for its high - performance capabilities, with a 32 - bit RISC architecture that provides efficient instruction execution. It offers a maximum operating frequency of up to 96 MHz, enabling fast processing of complex tasks.
- **Thumb - 2 Instruction Set**: The use of the Thumb - 2 instruction set allows for a good balance between code density and performance. It reduces the memory footprint of the application code while still providing high - speed execution.

### 2.2 Memory
- **Flash Memory**: It comes equipped with 256 KB of in - system programmable flash memory. This large - capacity flash memory can store the application code, allowing for the development of feature - rich applications. The flash memory also supports read - while - write operations, which means that the microcontroller can continue to execute code from the flash while new data is being written to it.
- **SRAM**: There is 64 KB of static random - access memory (SRAM). This SRAM provides fast access for data storage during the execution of the application, enabling quick data processing and manipulation.

### 2.3 Peripherals
- **USB Interface**: One of the standout features of the ATSAM3U4EA - CU is its integrated USB 2.0 full - speed device controller. This allows the microcontroller to easily communicate with other USB - enabled devices, such as computers, smartphones, and tablets. It supports various USB classes, including Human Interface Device (HID), Mass Storage Device (MSD), and Communication Device Class (CDC), making it suitable for a wide range of USB - based applications.
- **UART, SPI, and I2C Interfaces**: The microcontroller offers multiple Universal Asynchronous Receiver - Transmitter (UART), Serial Peripheral Interface (SPI), and Inter - Integrated Circuit (I2C) interfaces. These interfaces enable seamless communication with external devices such as sensors, actuators, and other microcontrollers. The UART interface is commonly used for serial communication over long distances, while the SPI and I2C interfaces are ideal for short - range, high - speed communication.
- **Timers and Counters**: It includes several general - purpose timers and counters. These can be used for a variety of applications, such as generating precise timing signals, measuring time intervals, and controlling the speed of motors. The timers can also be configured to generate Pulse Width Modulation (PWM) signals, which are useful for controlling the brightness of LEDs or the speed of DC motors.

### 2.4 Power Management
- **Low - Power Modes**: The ATSAM3U4EA - CU is designed with multiple low - power modes, including sleep, standby, and backup modes. In sleep mode, the microcontroller can reduce its power consumption significantly while still maintaining the state of its registers and SRAM. Standby mode further reduces power consumption by shutting down most of the on - chip peripherals, and backup mode can retain a small amount of data with minimal power consumption. This makes the microcontroller suitable for battery - powered applications where power efficiency is crucial.

## 3. Development Tools
- **Integrated Development Environment (IDE)**: Microchip provides the MPLAB

Images for reference

144-LFBGA

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Datasheets

Partlist

ATSAM3U4EA-CU