ATSAM4S8BA-MU

Overview

The ATSAM4S8BA-MU is a Microchip Technology microcontroller from the SAM4S series, built on an ARM Cortex-M4 core. It features 512 KB of Flash memory and 128 KB of SRAM. The device operates at a maximum clock frequency of 120 MHz and includes a 2 KB cache. It supports a 32-bit data bus width and offers up to 79 I/O pins. Key peripherals include a Full-Speed USB Device port, High-Speed MCI for SDIO/SD/MMC, three SPI interfaces, two I2C interfaces, two USARTs, two UARTs, one I2S interface, four 16-bit PWM channels, and six 16-bit timers. The ADC resolution is 12 bits with 16 channels.

Feature Summary

• Built around the ARM Cortex-M4 processor running at up to 120 MHz with integrated Flash read accelerator and optional cache memory.
• Provides pin-to-pin compatibility with SAM4N, SAM3S, SAM3N, and SAM7S devices to facilitate portfolio migration.
• Integrates hardware code protection features including memory access prevention, secure chip erase support, and CRC checks for memory integrity.
• Offers native support for Microchip QTouch capacitive touch technology for implementing buttons, sliders, and wheels.

Applications

• Consumer goods and toys
• Industrial control systems
• Metering applications
• Medical devices
• Test and measurement equipment

Procurement Notes

Verify the specific package type and temperature range requirements against the datasheet before ordering. Confirm that the 64-pin QFN package aligns with your PCB layout constraints. Ensure the operating voltage and current consumption specifications meet your system's power budget. Check for any specific RoHS or environmental compliance certifications required by your supply chain standards.

Selection Notes

Select this component if your design requires pin-to-pin compatibility with legacy SAM3S or SAM7S devices while needing higher performance. Consider the 120 MHz speed and 512 KB Flash capacity for complex application logic. Evaluate the peripheral set, particularly the USB and SDIO interfaces, against your connectivity needs. Compare power consumption metrics in active and standby modes with other SAM4S variants to optimize energy efficiency.

Part Context

The ATSAM4S8BA-MU belongs to the SAM4S family of 32-bit microcontrollers based on the ARM Cortex-M4 architecture. This series is designed to offer scalable performance and memory density with improved power efficiency. It serves as an upgrade path for designs previously using SAM3S or SAM7S devices, providing enhanced processing capabilities and additional peripherals within a compatible footprint.

Replacement Considerations

ATSAM4S8BA-AU (64-pin LQFP)

FAQ

Is the ATSAM4S8BA-MU pin-compatible with older Microchip microcontrollers?

Yes, the SAM4S series offers pin-to-pin compatibility with SAM4N, SAM3S, SAM3N, and SAM7S devices, facilitating easy migration within the portfolio.

What is the maximum operating frequency of the ATSAM4S8BA-MU?

The device operates at a maximum speed of 120 MHz.

Does the ATSAM4S8BA-MU support capacitive touch sensing?

Yes, it offers native support for Microchip's QTouch technology, allowing for the implementation of buttons, sliders, and wheels.