ATXMEGA64A3U-MHR

Overview

The ATXMEGA64A3U-MHR is an 8/16-bit AVR XMEGA microcontroller featuring a 64KB in-system self-programmable flash memory, 2KB EEPROM, and 4KB internal SRAM. It operates at frequencies up to 32MHz with a supply voltage range of 1.6V to 3.6V. The device includes a four-channel DMA controller, eight-channel event system, seven 16-bit timer/counters, one USB 2.0 full-speed interface, seven USARTs, two TWIs, three SPIs, AES/DES crypto engine, two 16-channel 12-bit ADCs, one 2-channel 12-bit DAC, and four analog comparators. It utilizes a 64-pad QFN package.

Feature Summary

• Integrates a high-performance AVR RISC CPU with hardware multiplier and single-cycle execution for efficient processing.
• Provides extensive connectivity including a USB 2.0 full-speed interface, multiple serial communication protocols, and cryptographic engines.
• Features advanced peripheral capabilities such as a four-channel DMA controller, eight-channel event system, and high-resolution timers.
• Supports low-power operation through five selectable sleep modes and programmable power management features.

Applications

• Industrial control systems
• Factory automation
• Medical applications
• USB connectivity devices
• Low power battery applications

Procurement Notes

Verify the specific ordering suffix 'MHR' corresponds to the tape and reel packaging format as documented in the official datasheet. Confirm that the component meets RoHS compliance and halide-free requirements specified by the manufacturer. Ensure compatibility with standard surface-mount assembly processes for the 64-pad QFN package.

Selection Notes

Select this component when a balance of moderate program memory size and rich peripheral integration is required. The inclusion of a dedicated USB interface and cryptographic engine makes it suitable for secure communication applications. Consider the operating voltage range and temperature specifications to ensure suitability for the target environment.

Part Context

This part belongs to the Microchip AVR XMEGA A3U family, designed for high-performance, low-power embedded applications. The series combines an 8/16-bit RISC CPU with nonvolatile memory technologies and a wide array of peripherals. It serves as a successor to earlier AVR architectures, offering improved throughput and energy efficiency for complex control tasks.

Replacement Considerations

The ATXMEGA64A3U-AUR is a compatible alternative within the same family, differing primarily in its TQFP-64 package instead of the QFN-64 form factor. Both variants share identical electrical characteristics, memory sizes, and peripheral configurations.

FAQ

What is the maximum operating frequency of the ATXMEGA64A3U-MHR?

The device supports operating frequencies up to 32MHz when powered between 2.7V and 3.6V, and up to 12MHz when powered between 1.6V and 3.6V.

Does the ATXMEGA64A3U-MHR support capacitive touch sensing?

Yes, the device supports capacitive touch buttons, sliders, and wheels through the Atmel QTouch library, which can be integrated into the application software.