ATSAM4LS8AA-MU

Overview

The ATSAM4LS8AA-MU is a 32-bit ARM Cortex-M4 microcontroller from the SAM4L series, operating at frequencies up to 48MHz. It features 512KB of embedded Flash memory and 64KB of SRAM within a 64-lead QFN package. The device incorporates picoPower technology for ultra-low power consumption, supporting active modes down to 90µA/MHz with configurable voltage scaling. Key peripherals include a USB 2.0 Device interface, a 16-channel 12-bit ADC, an LCD controller, and various serial communication interfaces such as USART, SPI, and TWI.

Feature Summary

• Integrates picoPower technology enabling ultra-low power operation across multiple sleep modes including Wait, Retention, and Backup.
• Includes a dedicated Liquid Crystal Display (LCD) controller capable of driving passive displays with integrated buffers and waveform control.
• Features an embedded hardware capacitive touch module supporting autonomous detection for buttons, sliders, and wheels.
• Provides a full-speed USB 2.0 device interface with an on-chip transceiver and support for multiple endpoints.

Applications

• Battery-powered wearable devices requiring low active current and extended standby times
• Industrial controllers utilizing capacitive touch interfaces for user input
• Portable instrumentation with monochrome LCD display requirements
• USB-enabled data loggers or peripheral devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type, temperature range, and tape-and-reel specifications. Ensure compatibility with the required voltage domain and clock configuration before integration into the design.

Selection Notes

Select this component when application requirements demand a balance between high-performance processing and strict power constraints. The SAM4L series is suitable for designs needing integrated LCD driving and capacitive touch capabilities without external controllers. Evaluate the available GPIO count and peripheral set against system connectivity needs.

Part Context

This part belongs to the Microchip SAM4L family, which targets low-power applications. Unlike the SAM4S series focused on higher performance, the SAM4L emphasizes energy efficiency through picoPower technology. The LS sub-series specifically excludes the AES security module found in the LC variant but retains robust connectivity and display control features.

Replacement Considerations

Consult the official SAM4L datasheet for cross-reference information. Verify pinout compatibility and memory size equivalence when considering alternative parts within the same family or competitor offerings.