ATSAM3S4AA-AU

Overview

The ATSAM3S4AA-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 SRAM. The device supports a supply voltage range of 1.62V to 3.6V and includes an internal oscillator. Connectivity options include USB, I2C, SPI, SSC, UART/USART, and MMC interfaces. It provides 79 general-purpose I/Os and integrates peripherals such as DMA, PWM, and watchdog timers.

Feature Summary

• Integrates an ARM Cortex-M3 processor with hardware multiply and divide capabilities for efficient code execution.
• Includes a dedicated flash controller supporting in-system programming and self-write operations.
• Features a comprehensive set of communication interfaces including USB Device and multiple serial controllers.
• Supports low-power modes with backup mode operation retaining data via battery backup.

Applications

• Consumer electronics requiring USB connectivity
• Industrial control systems using serial communication protocols
• Portable devices utilizing low-power management features

Procurement Notes

Verify the specific package variant, as the ATSAM3S4 series includes both LQFP-48 and LQFP-100 options. Confirm that the AA suffix corresponds to the correct temperature range and pinout for your design. Check for recent Product Change Notifications regarding assembly sites or marking changes to ensure compatibility with existing manufacturing processes.

Selection Notes

Select this component when a balance of processing power and peripheral count is required within a compact footprint. Compare against the ATSAM3S4CA-AU if additional I/O pins are necessary, noting the package difference. Ensure the 64MHz clock speed meets the real-time processing requirements of the application without exceeding thermal limits.

Part Context

This part belongs to the SAM3S family of Microchip microcontrollers, designed for cost-sensitive applications. It shares architectural similarities with other SAM3 variants but offers specific memory and I/O configurations tailored for embedded systems. The series emphasizes energy efficiency and ease of integration through standardized peripheral sets.

Replacement Considerations

The ATSAM3S4CA-AU serves as a functional alternative with increased I/O capacity in a larger package. Verify pin compatibility and software migration efforts before substitution. No direct pin-to-pin replacements exist within the same package type with different specifications.