ATSAM3S1AA-AUR

Overview

The ATSAM3S1AA-AUR is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at speeds up to 64 MHz. It features 64 KB of embedded Flash memory and 16 KB of SRAM. The device supports a supply voltage range of 1.62 V to 3.6 V and includes an internal oscillator. Connectivity options include I2C, SPI, UART/USART, and IrDA interfaces. It offers 34 programmable I/O lines and integrates peripherals such as DMA, PWM, and watchdog timers within a 48-LQFP package.

Feature Summary

• Integrates an ARM Cortex-M3 processor with Thumb-2 instruction set support for efficient code execution.
• Provides embedded Flash and SRAM with single-plane access architecture for data storage and processing.
• Includes system protection features like Power-on Reset (POR), Brown-out Detection (BOD), and Watchdog Timer.
• Supports multiple communication protocols including I2C, SPI, USART, and IrDA for versatile peripheral connectivity.

Applications

• General-purpose embedded control systems
• Industrial automation controllers
• Consumer electronics devices
• Simple IoT nodes requiring low pin count

Procurement Notes

Verify the specific suffix 'AUR' against the manufacturer's current datasheet to confirm packaging type and temperature grade. Ensure compatibility with existing design-in requirements for the 48-LQFP footprint. Cross-reference part numbers with official Microchip documentation to avoid confusion with similar SAM3S variants that may have different memory sizes or interface sets.

Selection Notes

Select this component when a balance of moderate processing power and minimal pin count is required. The 64 KB Flash size suits applications with limited firmware complexity. Verify that the 34 available I/O lines meet all connection needs, as higher pin counts are not available in this specific package variant. Confirm voltage domain compatibility with the 1.62 V to 3.6 V operating range.

Part Context

This part belongs to the Microchip SAM3S series, which utilizes the ARM Cortex-M3 architecture. It is designed as a cost-effective solution for applications needing reliable performance without the complexity of larger MCU families. The series emphasizes ease of integration through pin-to-pin compatibility with legacy SAM7S products in smaller packages.

Replacement Considerations

Direct replacements within the same family include ATSAM3S1AB-AU, which shares identical electrical specifications but differs in package type. Other SAM3S variants with different memory capacities, such as ATSAM3S4CA or ATSAM3S8CA, require significant hardware redesign due to pin count differences.