ATSAM3U4CA-AU

Overview

The ATSAM3U4CA-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, multiple USARTs, TWIs, SPIs, PWM timers, and ADCs. It operates from 1.62V to 3.6V and is housed in a 100-lead LQFP package.

Feature Summary

• High-performance 32-bit ARM Cortex-M3 processor with Thumb-2 instruction set
• Integrated High-Speed USB Device Port with embedded transceiver
• Support for low-power modes including Sleep, Wait, and Backup
• Real-time Event Management for peripheral communication without processor intervention

Applications

• Data loggers
• PC peripherals
• High-speed bridge applications (USB to SDIO, USB to SPI, USB to External Bus Interface)

Procurement Notes

Verify the specific suffix 'C' indicates the 100-pin LQFP package variant. Confirm the voltage range requirements align with your system design, particularly regarding USB and ADC usability at different supply voltages. Ensure compatibility with the 1.62V to 3.6V operating range.

Selection Notes

Select this component for applications requiring high-speed USB connectivity and robust peripheral interfaces. Consider the 256KB Flash and 52KB SRAM capacity for complex firmware needs. Evaluate the low-power mode options if energy efficiency is critical for the target application.

Part Context

Part of the Atmel SMART SAM3U series, designed for high-speed data transfers. It utilizes a multi-layer bus matrix and multiple SRAM banks to maximize throughput. The series supports various packages, with the 'C' suffix denoting the 100-pin configuration.

Replacement Considerations

ATSAM3U4EA-AU offers similar specifications but in a 144-pin package.