ATSAM3U1CA-CU

Overview

The ATSAM3U1CA-CU is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum frequency of 96 MHz. It features 64 kB of embedded Flash memory and 20 kB of SRAM within a 100-pin TFBGA package. The device includes an integrated USB 2.0 High-Speed Device port with an embedded transceiver, supporting data rates up to 480 Mbps. Peripheral interfaces consist of four SPI controllers, three USARTs, one TWI interface, and multiple timers including PWM units. It operates on a single supply voltage ranging from 1.62 V to 3.6 V.

Feature Summary

• Integrates a high-performance ARM Cortex-M3 processor with Memory Protection Unit capabilities for secure code execution.
• Provides a dedicated High-Speed USB 2.0 Device interface with an embedded physical layer transceiver for direct connectivity.
• Includes an External Bus Interface with NAND Flash controller support, enabling expansion of external memory resources.
• Features low-power management modes with backup power consumption as low as 2.5 μA in standby mode.

Applications

• USB-enabled consumer peripherals and computer accessories
• Industrial control systems requiring robust communication interfaces
• Medical equipment utilizing serial communication protocols
• Portable devices necessitating efficient power management

Procurement Notes

Verify the specific suffix 'CU' corresponds to the TFBGA-100 package and industrial temperature range (-40°C to +85°C) in the official Microchip datasheet. Confirm RoHS compliance status through current manufacturer documentation. Ensure ESD handling procedures are followed during assembly due to moisture sensitivity classification. Cross-reference pin assignments with the latest package drawing to avoid layout errors.

Selection Notes

Select this component when design requirements include a balance of moderate Flash capacity and high-speed USB connectivity without Ethernet. Compare against ATSAM3U2CA-CU if additional RAM or peripheral channels are needed. Evaluate power consumption profiles against ATSAM3N series if lower cost and reduced pin count are prioritized over performance. Ensure the 1.62 V to 3.6 V supply range aligns with system power architecture.

Part Context

The ATSAM3U1CA-CU belongs to the SAM3U family of Microchip microcontrollers, designed for applications demanding high performance and rich connectivity. This series bridges the gap between entry-level and high-end MCUs by offering USB HS capabilities alongside standard serial interfaces. It serves as a successor to older AVR and ARM7 architectures, providing enhanced processing power and peripheral integration for modern embedded systems.

Replacement Considerations

ATSAM3U1CB-CU: Offers identical core specifications but utilizes a different package variant. ATSAM3U2CA-CU: Provides increased memory (128 kB Flash, 36 kB SRAM) and additional peripherals while maintaining the same package and interface set.