ATXMEGA64A3U-AU

Overview

The ATXMEGA64A3U-AU is an 8/16-bit AVR XMEGA microcontroller featuring a 32 MHz CPU, 64 KB flash, 4 KB SRAM, and 2 KB EEPROM. It operates between 1.6 V and 3.6 V across -40°C to 85°C in a 64-lead TQFP package. Key peripherals include a USB 2.0 interface, seven USARTs, two 12-bit ADCs, one 12-bit DAC, AES/DES crypto engine, four-channel DMA, and eight-channel event system.

Feature Summary

• Integrates a full-speed USB 2.0 device interface with 32 configurable endpoints for direct connectivity.
• Includes dedicated hardware encryption engines supporting AES and DES protocols alongside CRC generators.
• Features an eight-channel event system and four-channel DMA controller for high-speed peripheral data handling without CPU intervention.
• Provides multiple analog conversion options including dual 12-bit ADCs and a dual-channel 12-bit DAC.

Applications

• Industrial control systems
• Factory automation equipment
• Medical devices
• USB-enabled consumer electronics

Procurement Notes

Verify the specific ordering suffix 'AU' corresponds to the 64-lead TQFP package and industrial temperature range (-40°C to 85°C). Confirm RoHS compliance status as indicated in the manufacturer's documentation. Ensure compatibility with existing programming interfaces such as PDI or JTAG during integration planning.

Selection Notes

Select this component when a robust USB interface combined with high-performance cryptographic capabilities is required. The A3U series offers extended timer features and advanced waveform extensions compared to standard AVR models. Evaluate memory requirements against the 64 KB flash limit and consider the 50 available programmable I/O lines for system architecture design.

Part Context

This device belongs to the AVR XMEGA A3U family, designed for applications demanding high throughput and low power consumption. It utilizes an enhanced RISC architecture executing instructions in a single clock cycle. The family supports various packages and memory sizes, positioning it as a versatile solution for complex embedded control tasks requiring significant peripheral integration.

Replacement Considerations

ATXMEGA64A3U-MH (QFN-64 package variant)

FAQ

Does the ATXMEGA64A3U-AU support capacitive touch sensing?

Yes, the device supports the Atmel QTouch library for implementing capacitive touch buttons, sliders, and wheels.

What programming interfaces are available on this microcontroller?

The device supports both the Program and Debug Interface (PDI) and a JTAG interface compliant with IEEE 1149.1 standards.