ATSAM4LC4AA-AUR

Overview

The ATSAM4LC4AA-AU is a 32-bit microcontroller based on the ARM Cortex-M4 core, operating at frequencies up to 48MHz. It features 256KB of embedded Flash memory and 32KB of SRAM. The device supports a single power supply ranging from 1.68V to 3.6V and includes an internal oscillator. Key peripherals include USB 2.0 Device and Embedded Host capabilities, a segment LCD controller, capacitive touch module, and various communication interfaces such as SPI, I2C, and USART.

Feature Summary

• Integrates picoPower technology for ultra-low power consumption with configurable voltage scaling.
• Includes a hardware AESA module compliant with FIPS Publication 197 for secure data encryption.
• Features a dedicated segment LCD controller supporting passive displays with integrated buffers.
• Supports direct peripheral-to-peripheral communication via the Peripheral Event System.

Applications

• Battery-powered wearable devices requiring low active current
• Industrial control systems utilizing LINbus or ISO7816 protocols
• Consumer electronics with capacitive touch user interfaces
• Audio applications using Inter-IC Sound (I2S) controllers

Procurement Notes

Verify the specific package variant, as the 'AU' suffix typically denotes a TQFP package, while other suffixes may indicate QFN or WLCSP options. Confirm that the required pin count matches the 48-pin configuration associated with this part number. Ensure the design accounts for the specified voltage range and temperature ratings before finalizing procurement.

Selection Notes

Select this component when application requirements align with the 256KB Flash and 32KB RAM capacity of the SAM4L4 sub-series. It is suitable for designs needing USB host/device functionality alongside cryptographic security without the higher cost of larger memory variants. Consider the 48-pin form factor if board space is limited compared to the 100-pin options.

Part Context

This part belongs to the Microchip SAM4L series, which utilizes the ARM Cortex-M4 processor. The SAM4L family is distinguished by its picoPower technology and integration of peripherals like LCD controllers and capacitive touch modules, targeting low-power applications. The ATSAM4LC4AA-AU represents a specific memory and package configuration within this broader ecosystem.

Replacement Considerations

Direct substitutes within the same package and pinout include other ATSAM4LC4 variants with different memory sizes or suffixes, provided the electrical characteristics match. Cross-family replacements require careful evaluation of pin compatibility and peripheral availability.