ATSAM3S4BA-AUR

Overview

The ATSAM3S4BA-AUR is a 32-bit microcontroller unit (MCU) from the Microchip SAM3S series, featuring an ARM Cortex-M3 processor core. It operates at a maximum clock frequency of 64 MHz and includes 256 KB of in-system programmable flash memory alongside 48 KB of static RAM. The device integrates multiple communication interfaces including USB Full-Speed, SPI, I2C, USART, SSC, and MMC/SD capabilities. It supports up to 47 general-purpose I/O pins and offers analog conversion features with ten 12-bit ADC channels and two 12-bit DAC channels. Powered by a supply voltage ranging from 1.62 V to 3.6 V, it is housed in a 64-pin LQFP package suitable for surface-mount applications.

Feature Summary

• Integrates an ARM Cortex-M3 processor core optimized for high-efficiency code execution and low-power operation.
• Provides extensive connectivity through integrated peripherals such as USB Full-Speed, multiple SPI controllers, I2C, and USART interfaces.
• Includes built-in analog-to-digital and digital-to-analog converters for signal processing and control applications.
• Features robust peripheral sets including DMA controller, PWM units, watchdog timer, and power-on reset logic.

Applications

• Industrial control systems requiring reliable real-time processing
• Consumer electronics utilizing USB connectivity for data transfer or charging
• Medical devices needing precise analog signal acquisition via ADC/DAC
• Automotive instrumentation panels and embedded control modules

Procurement Notes

Verify the specific suffix 'AUR' indicates tape-and-reel packaging when sourcing components. Confirm that the part number matches the exact pin count and package dimensions required for your PCB layout. Ensure compatibility with the intended operating temperature range and voltage supply levels before finalizing procurement decisions.

Selection Notes

Select this component when a balance of processing power and peripheral integration is needed within a compact 64-pin form factor. Consider the 64 MHz speed limit and 256 KB memory size against application requirements. Evaluate the availability of necessary software drivers and development tools compatible with the SAM3S family for efficient implementation.

Part Context

This MCU belongs to the SAM3S family, designed for cost-sensitive applications demanding ARM Cortex-M3 performance. It shares architectural similarities with other SAM3 variants but differs in memory capacity and package options. The series targets markets requiring efficient code execution and rich peripheral sets without the complexity of higher-end processors.

Replacement Considerations

Direct substitutes include other parts within the SAM3S family with equivalent memory and I/O configurations, such as ATSAM3S4CA variants if a different package is acceptable. Cross-series replacements like SAM4S offer higher performance but may require design adjustments due to architectural differences.