ATXMEGA64A4-MU

Overview

The ATXMEGA64A4-MU is an 8/16-bit microcontroller from the XMEGA A4 family, featuring a 64 KB Flash program memory and 4 KB SRAM. It operates within a voltage range of 1.6 V to 3.6 V and supports clock speeds up to 32 MHz at higher voltages or 12 MHz across the full supply range. The device utilizes a 44-lead TQFP package and includes a four-channel DMA controller, eight-channel event system, five 16-bit timers, five USARTs, two TWIs, two SPIs, a 12-channel 12-bit ADC, and a two-channel 12-bit DAC.

Feature Summary

• Features a high-performance AVR RISC architecture with single-cycle execution capabilities for optimized power consumption versus processing speed.
• Integrates a four-channel Direct Memory Access (DMA) controller and an eight-channel Event System for autonomous peripheral communication without CPU intervention.
• Includes robust security features such as AES and DES crypto engines, programmable lock bits, and Read-While-Write capabilities in Flash memory.
• Provides extensive analog peripherals including a 12-bit ADC with differential inputs, a 12-bit DAC, and analog comparators with window compare functions.

Applications

• Industrial control systems
• Factory automation equipment
• Motor control applications
• HVAC and climate control units
• Hand-held battery-powered devices

Procurement Notes

Verify component authenticity through authorized Microchip Technology distributors. Confirm that the ordering suffix corresponds to the specified 44-lead TQFP package. Ensure compliance with RoHS directives and verify temperature ratings match operational requirements. Check for specific packaging configurations if required by assembly processes.

Selection Notes

Select this model when 64 KB of non-volatile program storage and 4 KB of RAM are required within a 44-pin footprint. Consider the XMEGA A4U series for new designs as the A4 family is not recommended for future development. Evaluate pin count availability against the 34 programmable I/O lines provided by the TQFP package.

Part Context

This component belongs to the Atmel AVR XMEGA A4 microcontroller family, which is characterized by low power consumption and rich peripheral integration. The XMEGA A4 series serves as a predecessor to the A4U series, offering similar architectural foundations but with distinct package and performance optimizations in newer iterations.

Replacement Considerations

Microchip recommends using the XMEGA A4U series for new designs instead of the A4 family. Verify pin compatibility and software migration requirements when transitioning to alternative packages or updated series within the same manufacturer's portfolio.

FAQ

What is the maximum operating frequency of the ATXMEGA64A4-MU?

The device supports a maximum clock frequency of 32 MHz when operating between 2.7 V and 3.6 V, and up to 12 MHz across the full 1.6 V to 3.6 V supply range.

Does the ATXMEGA64A4-MU support in-system programming?

Yes, the device features In-System Programmable (ISP) Flash memory accessible via the Program and Debug Interface (PDI), allowing code updates without removing the chip from the circuit.

How many general purpose I/O lines are available on this package?

The 44-lead TQFP package provides 34 programmable general purpose I/O lines.