ATXMEGA64A3U-MH

Overview

The ATXMEGA64A3U-MH is an 8-bit AVR XMEGA microcontroller featuring a 64 KB in-system self-programmable flash memory, 2 KB EEPROM, and 4 KB internal SRAM. It operates within a voltage range of 1.6 V to 3.6 V and supports clock frequencies up to 32 MHz at 2.7 V or higher. The device includes a four-channel DMA controller, an eight-channel event system, seven 16-bit timer/counters, one USB 2.0 full-speed interface, seven USARTs, two TWI interfaces, three SPIs, AES/DES crypto engines, two 16-channel 12-bit ADCs, one 2-channel 12-bit DAC, and four analog comparators. It provides 50 programmable I/O pins and is housed in a 64-pad QFN package.

Feature Summary

• Integrates a high-performance 8/16-bit AVR RISC CPU with single-cycle execution capabilities and hardware multiplication.
• Includes a dedicated USB 2.0 full-speed device interface supporting 32 endpoints with flexible configuration.
• Features advanced peripheral connectivity including multiple USARTs, SPIs, TWIs, and a four-channel DMA controller for efficient data handling.
• Supports capacitive touch sensing through the integrated QTouch library for buttons, sliders, and wheels.

Applications

• Industrial control systems
• Factory automation equipment
• Medical devices
• USB connectivity applications

Procurement Notes

Verify the specific ordering code ATXMEGA64A3U-MH against official Microchip documentation to confirm package type and temperature rating. Ensure compatibility with required programming interfaces such as PDI or JTAG. Confirm that the selected component meets all environmental specifications for the intended operating conditions.

Selection Notes

Select this microcontroller when a balance of processing speed, low power consumption, and rich peripheral integration is required. The inclusion of a hardware USB interface and cryptographic engines makes it suitable for secure communication applications. Consider the available memory sizes and I/O counts relative to system requirements before finalizing the design.

Part Context

This component belongs to the AVR XMEGA A3U family, which offers enhanced performance over standard AVR devices. The A3U series is characterized by its high-density nonvolatile memory technology and extensive peripheral set, including advanced analog converters and communication interfaces designed for complex embedded tasks.

Replacement Considerations

ATXMEGA64A3U-AU

FAQ

What programming interfaces are supported by the ATXMEGA64A3U-MH?

The device supports the Program and Debug Interface (PDI) and an IEEE 1149.1 compliant JTAG interface for programming and debugging.

Does the ATXMEGA64A3U-MH support capacitive touch sensing?

Yes, the device supports capacitive touch sensing through the Atmel QTouch library, enabling the implementation of buttons, sliders, and wheels.