ATSAM3U4EA-AU

Overview

The ATSAM3U4EA-AU is a 32-bit ARM Cortex-M3 microcontroller operating at up to 96 MHz. It features 256 Kbytes of Flash memory and 52 Kbytes of SRAM. The device includes a High-Speed USB Device Port, HSMCI, External Bus Interface, four USARTs, two TWIs, five SPIs, and multiple timers. It supports low-power modes including Sleep, Wait, and Backup. The unit operates from 1.62V to 3.6V and utilizes a 144-lead LQFP package.

Feature Summary

• High-performance 32-bit ARM Cortex-M3 processor with Memory Protection Unit
• Integrated High-Speed USB Device Port with embedded transceiver
• External Bus Interface supporting NAND Flash controller with ECC
• Real-time Event Management for peripheral-to-peripheral communication

Applications

• Data loggers
• PC peripherals
• USB to SDIO bridge applications
• USB to SPI bridge applications
• USB to External Bus Interface bridge applications

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature range. Ensure compatibility with existing schematic designs regarding pinout assignments and power supply requirements. Confirm component availability status through authorized distribution channels prior to finalizing procurement plans.

Selection Notes

Select this model when high-speed data transfer capabilities are required alongside robust USB connectivity. The inclusion of an External Bus Interface makes it suitable for applications needing direct access to external memory or peripherals. Consider the 144-pin package constraints during PCB layout planning to ensure adequate routing space for the extensive I/O lines.

Part Context

This component belongs to the Atmel SMART SAM3U series of Flash microcontrollers. The series is designed for applications requiring high performance and efficient power management. It integrates advanced peripherals such as multimedia card interfaces and multiple serial communication controllers within a compact form factor.

Replacement Considerations

Consult official datasheets for cross-reference information. Verify electrical characteristics and pin compatibility before substituting.