ATXMEGA64A4U-MNR

Overview

The ATXMEGA64A4U-MNR is an 8/16-bit microcontroller from the AVR XMEGA A4U family, manufactured by Microchip Technology. It features a 64 KB in-system self-programmable Flash memory, 2 KB EEPROM, and 4 KB internal SRAM. The device operates within a supply voltage range of 1.6 V to 3.6 V and supports clock frequencies up to 32 MHz when powered at 2.7 V or higher. It utilizes a 44-pad VQFN package (44M1) and includes a four-channel DMA controller, eight-channel event system, five 16-bit timer/counters, one USB device interface, five USARTs, two TWI interfaces, two SPIs, a 12-channel 12-bit ADC, and a two-channel 12-bit DAC.

Feature Summary

• Integrates a high-performance AVR enhanced RISC CPU capable of executing instructions in a single clock cycle for optimized power consumption versus processing speed.
• Includes a four-channel Direct Memory Access (DMA) controller and an eight-channel event system for efficient peripheral-to-peripheral communication without CPU intervention.
• Features a comprehensive analog subsystem with a twelve-channel 12-bit ADC, a two-channel 12-bit DAC, and two analog comparators with window compare functionality.
• Supports capacitive touch sensing through the QTouch library, enabling robust detection for buttons, sliders, and wheels using patented charge-transfer signal acquisition.

Applications

• Industrial control systems
• Low power battery applications
• USB connectivity devices
• Sensor control units

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature range. Ensure compatibility with the required programming interface, such as PDI. Confirm that the selected variant meets the environmental operating conditions necessary for the target application before finalizing procurement.

Selection Notes

Select this component for designs requiring integrated USB connectivity alongside rich analog peripherals and low-power operation. Consider the 44-pad VQFN package constraints regarding thermal dissipation and PCB layout. Evaluate the available I/O count and memory size against application requirements to ensure optimal resource utilization within the XMEGA A4U family.

Part Context

This part belongs to the AVR XMEGA A4U series, which combines nonvolatile memory technologies with advanced peripheral sets. The family is designed for embedded applications needing high throughput and energy efficiency. The A4U variants specifically offer USB capabilities and extensive analog conversion options, distinguishing them from other series in the broader AVR portfolio.

Replacement Considerations

Compatible substitutes within the same package include ATXMEGA64A4U-MH and ATXMEGA64A4U-MHR. Verify electrical characteristics and pinout compatibility before substitution. Other family members like ATXMEGA32A4U or ATXMEGA128A4U may require software adaptation due to differing memory sizes.