ATSAM3U1CA-AU

Overview

The ATSAM3U1CA-AU is a 32-bit ARM Cortex-M3 microcontroller operating at up to 96 MHz. It features 64 Kbytes of single-plane Flash and 20 Kbytes of SRAM within a 100-pin LQFP package. The device includes a High-Speed USB Device Port, four USARTs, one SPI, two TWIs, an HSMCI, and multiple ADCs. It supports low-power modes including Sleep, Wait, and Backup.

Feature Summary

• High-speed USB 2.0 Device interface with dedicated DMA
• Multi-layer bus matrix for parallel task execution
• Real-time Event Management for peripheral interaction
• Three software-selectable low-power modes

Applications

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

Procurement Notes

Verify the specific suffix 'AU' against the manufacturer's current documentation to confirm package type and temperature range. Confirm RoHS compliance status through official Microchip channels. Check for any Product Change Notifications (PCNs) regarding assembly sites or marking changes prior to finalizing procurement orders.

Selection Notes

Select this component when a 100-pin form factor is required alongside high-speed USB connectivity. Ensure the application utilizes the 64 Kbyte Flash capacity efficiently. Verify that the 20 Kbyte SRAM meets memory requirements. Consider the 96 MHz maximum speed for processing demands.

Part Context

This part belongs to the SAM3U series, designed for USB applications. It shares the Cortex-M3 core with other SAM3U variants but differs in memory size and pin count. The 'C' suffix indicates the 100-pin package option, while 'A' denotes the industrial temperature range.

Replacement Considerations

ATSAM3U2CA-AU offers increased memory. ATSAM3U4CA-AU provides dual-plane Flash. Cross-referencing with ATSAM3U1EA-AU requires checking for the 144-pin package difference.