ATSAM3U1EB-AU

Overview

The ATSAM3U1EB-AU is a 32-bit ARM Cortex-M3 microcontroller from the SAM3U series, operating at up to 96 MHz. It features 64 Kbytes of Flash memory and 20 Kbytes of SRAM. The device includes a High-Speed USB Device port with an embedded transceiver, supporting data rates up to 480 Mbps. Peripheral interfaces consist of four USARTs, two TWIs, five SPIs, one HSMCI, and one SSC. It provides up to 96 I/O lines and supports multiple low-power modes including Sleep, Wait, and Backup.

Feature Summary

• High-performance 32-bit ARM Cortex-M3 processor running at up to 96 MHz
• Integrated High-Speed USB Device port with embedded transceiver for 480 Mbps communication
• Multi-layer bus matrix architecture enabling parallel task execution and high data throughput
• Real-time Event Management allowing peripherals to react without processor intervention

Applications

• Data loggers requiring reliable storage and transfer capabilities
• PC peripherals utilizing high-speed USB connectivity
• High-speed bridge applications such as USB to SDIO or USB to External Bus Interface

Procurement Notes

Verify the specific suffix 'EB' against official Microchip documentation to confirm package type and temperature range, as standard datasheets may list 'E' (LQFP/BGA) or 'C' (LQFP/BGA). Confirm end-of-life status and availability through authorized distributors. Ensure schematic design accounts for the required power supply sequencing between VDDIO and VDDCORE.

Selection Notes

Select this component when a balance of moderate Flash capacity and extensive I/O count is required for USB-centric designs. The 144-pin package offers significant peripheral access compared to smaller variants. Consider the internal voltage regulator requirements and decoupling needs for stable operation across the specified temperature range.

Part Context

This part belongs to the Atmel | SMART SAM3U series of Flash microcontrollers based on the ARM Cortex-M3 core. The series is designed for applications demanding high-speed data transfers and robust USB connectivity. It shares architectural similarities with other SAM3U devices but differs in memory size and package options.

Replacement Considerations

Consult official substitution lists for equivalent SAM3U series devices with matching memory and package configurations. Verify pin compatibility if replacing with different package variants within the same family.

FAQ

What are the supported low-power modes for the ATSAM3U1EB-AU?

The device supports three software-selectable low-power modes: Sleep mode, where the processor is stopped; Wait mode, where all clocks are stopped but power remains; and Backup mode, which retains only RTC and wake-up logic functionality.

How does the Real-time Event Management function in this MCU?

It allows peripherals to receive, react to, and send events in Active and Sleep modes without processor intervention, enhancing system efficiency and response times.