ATXMEGA64A3U-AUR

Overview

The ATXMEGA64A3U-AUR is an 8/16-bit AVR XMEGA microcontroller featuring a 64KB in-system self-programmable flash, 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 device interface, seven USARTs, two TWIs, three SPIs, AES/DES crypto engine, two 12-bit ADCs, one 12-bit DAC, and four analog comparators. It utilizes a 64-lead TQFP package.

Feature Summary

• Integrates a high-performance AVR RISC CPU with hardware multiplier for efficient arithmetic operations
• Provides flexible connectivity via USB 2.0 full-speed interface, multiple serial communication ports, and cryptographic engines
• Supports low-power operation through five selectable sleep modes and peripheral clock control
• Features advanced analog capabilities including dual 12-bit ADCs, a 12-bit DAC, and window-compare analog comparators

Applications

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

Procurement Notes

Verify the specific ordering code matches the required package type and temperature range. Confirm that the 'R' suffix indicates tape and reel packaging as specified in the datasheet. Ensure compatibility with existing design constraints regarding the 64-lead TQFP form factor and operating voltage specifications before finalizing procurement.

Selection Notes

Select this component when a balance of processing speed and peripheral richness is required within a compact footprint. Consider the A3U series for its integrated USB capability and extensive analog peripherals. Evaluate memory requirements against the 64KB flash and 4KB SRAM limits. Verify that the 1.6V to 3.6V operating range aligns with the target system power supply architecture.

Part Context

This part belongs to the Atmel AVR XMEGA A3U family, designed for high-performance, low-power embedded applications. It builds upon the standard AVR architecture by adding advanced peripherals like the event system and DMA controller. The A3U series specifically targets applications requiring robust connectivity and precise analog signal processing.

Replacement Considerations

Datasheets indicate that the older ATxmega64A3-AU series is not recommended for new designs. Designers should transition to the ATxmega64A3U series or higher-density variants within the same family for updated features and support.

FAQ

What programming interfaces are supported by the ATXMEGA64A3U?

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

Does the ATXMEGA64A3U include capacitive touch sensing support?

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