ATSAM3U4EA-CU

Overview

The ATSAM3U4EA-CU 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, four USARTs, two TWIs, five SPIs, and multiple timers. It supports low-power modes including Sleep, Wait, and Backup. The component operates from 1.62V to 3.6V and is housed in 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
• Multi-layer bus matrix supporting parallel task execution and high data throughput
• Three software-selectable low-power modes for optimized energy consumption

Applications

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

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature range. Ensure compatibility with required voltage levels and interface configurations before procurement. Cross-reference datasheet revision dates to ensure accurate signal descriptions and electrical characteristics are applied during design.

Selection Notes

Select this model when dual-bank Flash architecture and extensive peripheral counts are required. The 144-pin package provides access to external bus interfaces and maximum I/O lines. Consider power supply constraints as USB functionality requires specific voltage thresholds relative to the main supply.

Part Context

This component belongs to the Atmel SMART SAM3U series of Flash microcontrollers. The series is designed for applications requiring high-speed data transfers and robust connectivity options. It utilizes a RISC processor architecture optimized for efficiency and performance in embedded control systems.

Replacement Considerations

Public confirmed substitute part numbers: ATSAM3U4CA-CU, ATSAM3U4E-AU.