ATXMEGA64A3-MHR

Overview

The ATXMEGA64A3-MHR is an 8/16-bit AVR XMEGA A3 microcontroller featuring 64 KB of In-System Self-Programmable Flash, 2 KB EEPROM, and 4 KB Internal SRAM. It operates at a maximum clock frequency of 32 MHz with a supply voltage range of 1.6 V to 3.6 V. The device includes a four-channel DMA controller, eight-channel event system, seven 16-bit Timer/Counters, seven USARTs, AES/DES crypto engine, two 12-bit ADCs, one 12-bit DAC, and five analog comparators. It provides 50 programmable I/O lines and is available in a 64-pad QFN package.

Feature Summary

• Integrates a high-performance 8/16-bit AVR RISC CPU with single-cycle execution capabilities.
• Includes a four-channel Direct Memory Access (DMA) controller for autonomous data transfers between memory and peripherals.
• Features an eight-channel Event System for low-latency inter-peripheral communication without CPU intervention.
• Provides hardware security through integrated AES and DES cryptographic engines.

Applications

• Industrial control systems
• Factory automation equipment
• Medical devices
• HVAC controllers

Procurement Notes

Verify the specific suffix 'MHR' against official Microchip documentation to confirm tape-and-reel packaging status, as datasheets primarily list 'MH' for QFN packages. Confirm RoHS compliance and lead-free specifications. Check current availability status, as this series is marked as not recommended for new designs.

Selection Notes

Select this component for applications requiring moderate code storage and rich peripheral integration within a compact footprint. Consider the XMEGA A3U series for new designs due to the A3 series being deprecated. Ensure voltage levels match the 1.6V to 3.6V operating range and verify thermal requirements for the QFN package.

Part Context

This part belongs to the AVR XMEGA A3 family, which offers high performance and low power consumption. The family shares common architectural features but varies in memory sizes. The ATXMEGA64A3 variant sits in the mid-range of the A3 lineup, balancing processing power with cost-effective memory resources for embedded applications.

Replacement Considerations

Microchip recommends using the XMEGA A3U series for new designs. Verify pin compatibility and software migration efforts when transitioning from the A3 to the A3U family.