ATSAM4LC2AA-AU

Overview

The ATSAM4LC2AA-AU is a 32-bit microcontroller based on the ARM Cortex-M4 processor, operating at frequencies up to 48MHz. It features 128KB of embedded Flash memory and 32KB of SRAM within a 48-lead LQFP package. The device incorporates picoPower technology for ultra-low power consumption, supporting active modes down to 90µA/MHz with configurable voltage scaling. It includes a segment LCD controller, capacitive touch module, USB device interface, and 128-bit AES encryption.

Feature Summary

• Integrates picoPower technology enabling ultra-low power operation across multiple sleep modes including Wait, Retention, and Backup.
• Includes an embedded segment LCD controller capable of driving passive displays with integrated waveform generation and contrast control.
• Features a hardware capacitive touch module supporting autonomous detection for buttons, sliders, and wheels without CPU intervention.
• Provides secure data protection through an embedded Advanced Encryption Standard (AES) module compliant with FIPS Publication 197.

Applications

• Battery-powered wearable devices requiring low active current and extended standby times
• Industrial controllers utilizing segment LCDs for local status display and user interaction
• Secure IoT endpoints requiring hardware-accelerated cryptographic operations
• Portable consumer electronics incorporating capacitive touch interfaces

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm package type, temperature range, and RoHS compliance status. Ensure that any requested variants match the exact pinout and peripheral configuration required by the design. Cross-reference the part number with the latest product change notices to account for assembly location or marking updates.

Selection Notes

Select this component when the application requires a balance of moderate processing performance and strict power constraints. The inclusion of a dedicated LCD controller and capacitive touch hardware reduces CPU load compared to general-purpose MCUs. Consider the 48-pin package density if board space is limited but sufficient I/O lines are needed for basic connectivity.

Part Context

This microcontroller belongs to the SAM4L series, which focuses on low-power applications using the Cortex-M4 core. Unlike the SAM4S series designed for higher performance, the SAM4L prioritizes energy efficiency through advanced power management units and specialized peripherals like the LCD driver and touch sensor interface.

Replacement Considerations

Direct substitutes within the same family include the ATSAM4LC4AA-AU and ATSAM4LC8AA-AU, which offer increased memory capacities while maintaining identical pinouts and peripheral sets. Verify that the replacement variant supports the required Flash and SRAM sizes for the firmware image.