ATSAM4LS4BA-AUR

Overview

The ATSAM4LS4BA-AUR 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 peripherals such as USB 2.0 Device, USART, SPI, I2C, ADC, DAC, and capacitive touch modules. It operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates picoPower technology for ultra-low power consumption with configurable voltage scaling.
• Includes an Advanced Encryption System (AES) module supporting 128-bit key lengths.
• Features a Peripheral Event System allowing direct peripheral-to-peripheral communication without CPU intervention.
• Supports SleepWalking functionality for intelligent wake-up decisions based on peripheral events.

Applications

• Battery-powered IoT sensor nodes
• Low-power wearable devices
• Industrial control systems requiring encryption
• USB-enabled consumer electronics

Procurement Notes

Verify the specific ordering suffix 'AUR' against official Microchip documentation to confirm tape-and-reel packaging and RoHS compliance status. Ensure the component matches the SAM4LS sub-series specifications rather than the LC or L4 variants. Cross-reference the datasheet revision date to confirm current manufacturing availability and any potential pinout or electrical characteristic updates.

Selection Notes

Select this model when 256KB Flash and 32KB RAM are sufficient for the application logic. Choose the AUR suffix if automated surface-mount assembly via tape-and-reel is required. Consider the SAM4LC series if segment LCD driving or AES hardware acceleration is needed, as these are not present in the LS variant. Verify that the 48MHz clock speed meets the processing requirements.

Part Context

This component belongs to the Microchip SAM4L series, designed for low-power applications using the ARM Cortex-M4 processor. The LS sub-series specifically excludes the Segment LCD controller and AES module found in the LC series, focusing instead on general-purpose connectivity and capacitive touch capabilities.

Replacement Considerations

ATSAM4LS4CA-AU: Same core and memory but in a 100-pin TQFP package.

FAQ

Does the ATSAM4LS4BA support hardware-accelerated encryption?

No, the SAM4LS sub-series does not include the Advanced Encryption System (AES) module; this feature is available in the SAM4LC series.

What is the maximum operating frequency of the ATSAM4LS4BA?

The ARM Cortex-M4 core runs at frequencies up to 48MHz.