ATSAM3S2AA-AUR

Overview

The ATSAM3S2AA-AUR is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum frequency of 64MHz. It features 128KB of embedded Flash memory and 32KB of SRAM. The device supports a supply voltage range of 1.62V to 3.6V and includes an internal oscillator. Connectivity options include I2C, MMC, SPI, SSC, UART/USART, and USB interfaces. It provides 34 general-purpose I/O pins 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.
• Includes built-in power management features such as an embedded voltage regulator and multiple reset sources.
• Supports direct memory access (DMA) to reduce CPU load during data transfers between peripherals and memory.

Applications

• Industrial control systems requiring robust peripheral integration
• Consumer electronics utilizing USB connectivity
• General-purpose embedded applications with moderate processing needs

Procurement Notes

Verify the specific suffix 'AUR' against official Microchip documentation to confirm tape-and-reel packaging and RoHS compliance status. Ensure the selected variant matches the required operating temperature range and pinout configuration for the target PCB design before finalizing procurement orders.

Selection Notes

Select this component when a balance of processing speed and low power consumption is required for cost-sensitive applications. Compare against the ATSAM3S2BA series if additional GPIO count or different packaging is needed. Verify that the 32KB RAM capacity meets the application's stack and heap requirements.

Part Context

This part belongs to the SAM3S family of microcontrollers, designed as successors to the legacy SAM7S series. It offers pin-to-pin compatibility with certain 48-pin SAM7S devices, facilitating migration for existing designs while providing enhanced performance and modern interface capabilities.

Replacement Considerations

The ATSAM3S2AA-AU is a tray-packaged equivalent with identical electrical specifications. For higher pin counts, the ATSAM3S2BA series serves as a compatible upgrade path within the same architecture.