ATXMEGA64B3-AU

Overview

The ATXMEGA64B3-AU is an 8/16-bit microcontroller from the AVR XMEGA B3 family, manufactured by Microchip Technology. It features a 32MHz operating frequency and operates within a voltage range of 1.6V to 3.6V across a temperature range of -40°C to 85°C. The device includes 64KB of in-system self-programmable flash memory, 2KB of EEPROM, and 4KB of internal SRAM. Connectivity options include USB 2.0 full speed, one USART with IrDA support, one TWI interface, and one SPI interface. Peripheral features consist of a two-channel DMA controller, four-channel event system, AES/DES crypto engine, LCD driver supporting up to 4x25 segments, and an eight-channel 12-bit ADC.

Feature Summary

• Integrates a high-performance AVR RISC CPU capable of single-cycle instruction execution for optimized power consumption versus processing speed.
• Includes a dedicated Liquid Crystal Display controller with built-in contrast control and flexible segment terminal bus swapping.
• Provides hardware security through integrated AES and DES cryptographic engines alongside CRC-16 and CRC-32 generators.
• Supports capacitive touch sensing interfaces via the QTouch library for buttons, sliders, and wheels.

Applications

• Industrial control systems
• Factory automation equipment
• Medical devices
• Utility metering applications

Procurement Notes

Verify the specific ordering code against official Microchip documentation to ensure correct package type and temperature rating. Confirm that the 'AU' suffix corresponds to the 64-lead TQFP package and industrial temperature range as specified in the datasheet. Cross-reference the component revision level to ensure compatibility with existing firmware and development tools.

Selection Notes

Select this component when a balance of moderate memory capacity and rich peripheral integration is required for low-power embedded designs. The inclusion of a USB interface and LCD driver makes it suitable for user-facing industrial or medical instrumentation. Evaluate the available I/O lines and timer configurations against application requirements before choosing higher-capacity variants in the B3 series.

Part Context

This microcontroller belongs to the AVR XMEGA B3 family, which emphasizes high performance and low power consumption. The family utilizes Atmel's high-density nonvolatile memory technology, allowing for in-system reprogramming via PDI or JTAG interfaces. The architecture supports read-while-write capabilities, enabling boot loader functionality without interrupting application execution.

Replacement Considerations

ATXMEGA64B3-AUR (Tape and Reel packaging variant)

FAQ

What programming interfaces are supported by the ATXMEGA64B3-AU?

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

Does the ATXMEGA64B3-AU support capacitive touch sensing?

Yes, the device supports capacitive touch sensing through the free QTouch library, enabling the implementation of buttons, sliders, and wheels.