ATSAM4LS2AA-MU

Overview

The ATSAM4LS2AA-MU is a 32-bit microcontroller based on the ARM Cortex-M4 RISC processor, operating at frequencies up to 48MHz. It features 128Kbytes of embedded Flash and 32Kbytes of SRAM within a 48-lead QFN package. The device incorporates picoPower technology for ultra-low power consumption, supporting active current down to 90 μA/MHz with configurable voltage scaling. It includes a full-speed USB 2.0 device interface, multiple communication peripherals such as USART, SPI, and TWI, and an integrated capacitive touch module.

Feature Summary

• Integrates picoPower technology enabling ultra-low power operation across various sleep modes while maintaining fast wake-up capabilities.
• Includes a high-performance 32-bit ARM Cortex-M4 processor equipped with a Memory Protection Unit (MPU) and Thumb-2 instruction set.
• Features an embedded hardware capacitive touch module supporting autonomous detection for buttons, sliders, and wheels.
• Provides a comprehensive peripheral set including USB 2.0 device support, LCD controller, and direct peripheral-to-peripheral communication via the Peripheral Event System.

Applications

• Battery-powered portable devices requiring extended operational life
• Consumer electronics utilizing capacitive touch interfaces
• USB-enabled data logging and communication equipment
• Smart home appliances with low standby power requirements

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type, temperature range, and tape-and-reel specifications. Ensure compatibility with existing PCB footprints and verify that the selected variant meets all environmental and regulatory standards required for the target application deployment.

Selection Notes

Select this component when a balance of moderate memory capacity and ultra-low power efficiency is required. The SAM4LS series is suitable for applications needing USB connectivity without the complexity of host capabilities or LCD controllers found in other sub-series variants. Evaluate pin count availability against I/O requirements before finalizing the choice.

Part Context

This part belongs to the SAM4L family of microcontrollers designed for low-power applications. Unlike the SAM4LC sub-series, the SAM4LS variant excludes the segment LCD controller and AES security module but retains USB device functionality. It serves as a cost-effective solution for applications prioritizing power management and basic connectivity over cryptographic hardware acceleration.

Replacement Considerations

ATSAM4LS2BA-MU

FAQ

Does the ATSAM4LS2AA-MU include an LCD controller?

No, the SAM4LS sub-series does not include a segment LCD controller, which is available only in the SAM4LC sub-series.

What is the maximum operating frequency of the core?

The ARM Cortex-M4 processor operates at frequencies up to 48MHz.