ATSAM3U1CA-CU

Overview

The ATSAM3U1CA-CU is a microcontroller based on the ARM Cortex-M3 processor, 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 embedded transceiver, an External Bus Interface, up to 4 USARTs, TWI, SPI, and multiple timers. It supports low-power modes including Sleep, Wait, and Backup. The component operates from 1.62V to 3.6V and is available in a 100-pin TFBGA package.

Feature Summary

• High-performance 32-bit ARM Cortex-M3 RISC processor running at up to 96 MHz
• Integrated High Speed USB Device Port with embedded transceiver for data transfer applications
• Supports multiple low-power modes: Sleep, Wait, and Backup for optimized energy consumption
• Includes Real-time Event Management allowing peripherals to react without processor intervention

Applications

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

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 integration. Cross-reference datasheet revision dates to validate feature availability.

Selection Notes

Select this model for applications requiring high-speed USB connectivity combined with moderate Flash and SRAM capacities. Consider the 100-pin TFBGA package constraints for PCB layout. Evaluate power supply requirements, specifically the 1.62V to 3.6V operating range and internal regulator capabilities.

Part Context

This component belongs to the SAM3U series of Flash microcontrollers. It shares architectural similarities with other devices in the family, such as the ATSAM3U2C and ATSAM3U4C, differing primarily in memory sizes and peripheral counts. The series is designed for USB-centric applications.

Replacement Considerations

Consult official Microchip documentation for confirmed substitute part numbers within the SAM3U series. Verify pinout compatibility and memory specifications when considering alternatives like ATSAM3U2CA-CU or ATSAM3U4CA-CU.