ATSAM3S4CA-AU

Overview

The ATSAM3S4CA-AU is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum frequency of 64MHz. It features 256KB of in-system programmable flash memory and 48KB of static RAM. The device includes an internal oscillator and supports a supply voltage range of 1.62V to 3.6V. Connectivity options include USB, SPI, I2C, USART, SSC, EBI/EMI, and SD/MMC interfaces. It provides 79 general-purpose I/Os and integrates peripherals such as DMA, PWM, I2S, and watchdog timers. Analog capabilities consist of 15 ADC channels (10/12-bit) and 2 DAC channels (12-bit).

Feature Summary

• Integrates ARM Cortex-M3 processor with single-cycle multiplication and hardware division for efficient code execution.
• Provides flexible connectivity through multiple communication interfaces including USB Full-Speed, SPI, I2C, and USART.
• Includes direct memory access controller to reduce CPU overhead during data transfers between peripherals and memory.
• Features low-power modes with fast wake-up times suitable for battery-operated applications.

Applications

• Industrial control systems requiring robust peripheral integration
• Consumer electronics utilizing USB connectivity
• Medical devices needing precise analog signal processing
• Smart home automation controllers

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to ensure correct package type and temperature rating. Confirm RoHS compliance status via current datasheets or environmental declarations. Check for any recent Product Change Notifications regarding assembly sites or marking changes that may affect part identification. Ensure compatibility with existing PCB footprint designs for the 100-LQFP package.

Selection Notes

Select this component when a balance of moderate flash capacity and extensive I/O count is required within a 100-pin package. Consider the 64MHz clock speed sufficient for real-time control tasks without the complexity of higher-end cores. Evaluate interface availability, particularly USB and analog converters, against system requirements before choosing over smaller pin-count variants in the SAM3S series.

Part Context

This part belongs to the SAM3S family of 32-bit Flash MCUs based on the ARM Cortex-M3 processor. The family targets cost-sensitive applications requiring high performance and low power consumption. The ATSAM3S4CA-AU represents a mid-range configuration within the series, offering significant program storage and versatile connectivity options compared to lower-density counterparts.

Replacement Considerations

ATSAM3S4CB-AU: Same specifications but different package option.

FAQ

What is the maximum operating frequency of the ATSAM3S4CA-AU?

The maximum operating frequency is 64 MHz.

Does the ATSAM3S4CA-AU support USB connectivity?

Yes, it includes a USB Full-Speed interface controller.