ATXMEGA64A1-AU

Overview

The ATXMEGA64A1-AU is an 8/16-bit AVR XMEGA microcontroller featuring a 100-lead TQFP package. It includes 64 KB of in-system self-programmable flash, 4 KB internal SRAM, and 2 KB EEPROM. The device operates at frequencies up to 32 MHz with a supply voltage range of 1.6 V to 3.6 V. Key peripherals include eight USARTs, four TWIs, four SPIs, two 16-channel 12-bit ADCs, two 2-channel 12-bit DACs, and a four-channel DMA controller.

Feature Summary

• Integrates a high-performance AVR RISC CPU with hardware multiplier for single-cycle instruction execution.
• Includes advanced analog peripherals such as dual 12-bit ADCs, dual 12-bit DACs, and analog comparators with window compare functionality.
• Supports capacitive touch sensing through the QTouch library for buttons, sliders, and wheels.
• Features a four-channel DMA controller and an eight-channel event system for efficient data transfer and peripheral synchronization.

Applications

• Industrial control systems
• Factory automation equipment
• Medical devices
• HVAC and building control
• Low power battery applications

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm package type matches the 100-lead TQFP requirement. Ensure the specific revision level aligns with project constraints, noting that this series is not recommended for new designs.

Selection Notes

Select this component for applications requiring extensive I/O connectivity and rich peripheral sets within a 100-pin form factor. Consider the operating voltage range and maximum clock frequency requirements. Evaluate the need for cryptographic engines and multiple serial interfaces when comparing against other MCU families.

Part Context

This part belongs to the AVR XMEGA A1 family, designed for high performance and low power consumption. It utilizes enhanced RISC architecture to achieve near 1 MIPS/MHz throughput. The family supports read-while-write capabilities and offers various sleep modes to optimize energy usage in embedded applications.

Replacement Considerations

Microchip recommends using the XMEGA A1U series as a replacement for new designs. Verify pinout compatibility and peripheral availability when migrating from the A1 series to the A1U series.

FAQ

What programming interface does the ATXMEGA64A1-AU support?

The device supports both the Program and Debug Interface (PDI) and an IEEE 1149.1 compliant JTAG interface for programming and debugging.

Does the ATXMEGA64A1-AU support external memory expansion?

Yes, it features an external bus interface capable of supporting up to 16 Mbytes of SRAM and up to 128 Mbit of SDRAM.