ATSAM4LS4AA-MU

Overview

The ATSAM4LS4AA-MU is a 32-bit microcontroller based on the ARM Cortex-M4 processor, operating at frequencies up to 48MHz. It features 256KB of embedded Flash memory and 32KB of SRAM. 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, a 16-channel 12-bit ADC, and a 10-bit DAC. Power supply ranges from 1.68V to 3.6V, and it operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates picoPower technology for ultra-low power consumption across multiple sleep modes.
• Includes a full-speed USB 2.0 device interface with an on-chip transceiver.
• Features a 16-channel analog-to-digital converter (ADC) with 12-bit resolution.
• Supports direct peripheral-to-peripheral communication via the Peripheral Event System.

Applications

• Portable battery-powered devices requiring extended operational life
• USB-enabled consumer electronics and peripherals
• Industrial control systems utilizing low-power sensor interfaces
• Wearable technology and smart home automation nodes

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and temperature rating. Confirm that the component matches the exact part number ATSAM4LS4AA-MU, as variations in suffixes may indicate different pin configurations or performance grades. Cross-reference the datasheet revision date to ensure compatibility with current design specifications.

Selection Notes

Select this component when a balance of processing performance and energy efficiency is required for embedded applications. The inclusion of hardware cryptographic modules and capacitive touch support makes it suitable for secure user interfaces. Ensure the design accommodates the single 1.68V to 3.6V supply requirement and utilizes the available GPIO multiplexing for optimal pin allocation.

Part Context

This microcontroller belongs to the SAM4L series, designed specifically for low-power applications using the ARM Cortex-M4 core. The series distinguishes itself through advanced power management features and integrated peripherals like LCD controllers and capacitive touch modules. It represents a transition toward highly efficient, feature-rich embedded solutions for portable markets.

Replacement Considerations

Consult the Microchip product selector guide for verified cross-references within the SAM4L family. Substitutes must match the core architecture, memory size, and package dimensions to maintain board compatibility.

FAQ

Does the ATSAM4LS4AA-MU support USB host functionality?

No, the ATSAM4LS sub-series supports only USB device functionality. The USB host capability is reserved for the ATSAM4LC sub-series.

What is the maximum operating frequency of the CPU?

The ARM Cortex-M4 processor in this device runs at a maximum frequency of 48MHz.