ATSAM3U2EA-AU

Overview

The ATSAM3U2EA-AU is a 100-pin LQFP microcontroller from the SAM3U series, featuring an ARM Cortex-M3 core running at up to 96 MHz. It integrates 128 Kbytes of Flash and 36 Kbytes of SRAM. Key peripherals include a High-Speed USB Device Port with embedded transceiver, four USARTs, two TWIs, five SPIs, and multiple ADCs. The device supports low-power modes including Sleep, Wait, and Backup, operating within a voltage range of 1.62V to 3.6V.

Feature Summary

• High-performance 32-bit ARM Cortex-M3 processor with Memory Protection Unit
• Integrated High-Speed USB Device Port with dedicated DMA channels
• Multi-layer bus matrix enabling parallel task execution and high data throughput
• Real-time Event Management for peripheral interaction without processor intervention

Applications

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

Procurement Notes

Verify the specific suffix 'AU' corresponds to the 100-lead LQFP package variant. Confirm that the 'E' designation in the base model indicates the extended temperature range if required by your application environment. Ensure compatibility with the 1.62V to 3.6V supply voltage requirements during schematic design.

Selection Notes

Select this component when a balance of processing power and peripheral density is needed in a compact 100-pin form factor. The 128 Kbyte Flash and 36 Kbyte SRAM configuration suits moderate complexity firmware. Consider the available GPIO count and specific peripheral needs like HSMCI or external bus interface before choosing between other SAM3U variants.

Part Context

This part belongs to the Atmel SMART SAM3U series of Flash microcontrollers based on the ARM Cortex-M3 architecture. The series offers varying memory sizes and package options, with the '2' indicating the 128 Kbyte Flash and 36 Kbyte SRAM configuration. The 'C' suffix typically denotes the 100-pin package family, while 'E' often refers to industrial/extended temperature grades.

Replacement Considerations

Direct substitutes within the same package and pinout include the ATSAM3U4EA-AU (with increased memory) or ATSAM3U1EA-AU (with reduced memory). Cross-package replacements require careful schematic review due to differing pin counts and peripheral availability.