ATSAM3S1BA-AU

Overview

The ATSAM3S1BA-AU is a 32-bit microcontroller based on the ARM Cortex-M3 core, manufactured by Microchip Technology. It features 64 kB of Flash program memory and 16 kB of SRAM data RAM. The device operates with a maximum clock frequency of 64 MHz and supports an input/output count of 47 pins. It includes a 10-channel, 12-bit Analog-to-Digital Converter (ADC) and two 12-bit Digital-to-Analog Converters (DAC). Power supply ranges from 1.62 V to 3.6 V, with I/O voltage at 3.3 V. Operating temperatures span from -40°C to +85°C. The component is housed in a 64-pin LQFP package.

Feature Summary

• Integrates an ARM Cortex-M3 processor core for efficient 32-bit execution.
• Includes multiple communication interfaces such as SPI, USART, and I2C.
• Features built-in analog conversion capabilities with ADC and DAC units.
• Supports Direct Memory Access (DMA) for high-speed data transfer.

Applications

• Industrial control systems requiring robust processing.
• Consumer electronics utilizing low-power ARM architectures.
• Medical devices needing precise analog signal acquisition.
• Automotive applications compatible with standard temperature ranges.

Procurement Notes

Verify the specific datasheet revision and manufacturing date code upon ordering. Confirm that the LQFP-64 package dimensions match your PCB footprint requirements. Ensure compatibility with existing firmware libraries for the SAM3S series. Check for any regional export restrictions or RoHS compliance documentation required for your specific deployment environment.

Selection Notes

Select this model when a balance of moderate memory capacity and rich peripheral connectivity is required. It is suitable for designs transitioning from 8-bit controllers to 32-bit ARM solutions. Consider the 64 MHz speed limit against higher-performance SAM4 or SAM7 series if complex real-time processing is needed. Evaluate pin count constraints as 47 I/Os are fixed within the 64-pin package.

Part Context

This component belongs to the Microchip SAM3S family, designed for cost-sensitive embedded applications. It shares architectural similarities with other SAM3 variants but offers specific memory and pin configurations tailored for general-purpose microcontroller tasks. The family emphasizes energy efficiency and ease of integration into compact electronic designs.

Replacement Considerations

ATSAM3S1CA-AU: Offers increased memory (64 kB Flash, 16 kB SRAM) but uses a QFP-100 package, requiring board redesign.

FAQ

What is the maximum operating frequency of the ATSAM3S1BA-AU?

The maximum clock frequency is 64 MHz.

Does this MCU support USB connectivity?

Yes, the SAM3S series typically includes a USB Device interface, though specific implementation depends on the exact silicon variant and pin availability.