ATSAM4LS4BA-AU

Overview

The ATSAM4LS4BA-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 peripherals such as USB 2.0 Device, USART, SPI, I2C, ADC, DAC, and capacitive touch modules. It is housed in a 64-lead TQFP package with an operating temperature range of -40°C to 85°C.

Feature Summary

• Integrates picoPower technology for ultra-low active current consumption and multiple low-power sleep modes with fast wake-up capabilities.
• Includes a full-speed USB 2.0 device interface with an on-chip transceiver and support for embedded host functionality.
• Features a hardware capacitive touch module (CATB) supporting autonomous detection for buttons, sliders, and wheels.
• Provides direct peripheral-to-peripheral communication via the Peripheral Event System and DMA controller without CPU intervention.

Applications

• Battery-powered portable devices requiring extended operational life
• Consumer electronics utilizing capacitive touch interfaces
• USB-enabled data logging and communication equipment
• Industrial control systems with low-power standby requirements

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and temperature grade. Confirm that the component meets all relevant regulatory standards required for your target market. Cross-reference the datasheet revision date with your design timeline to account for any potential engineering change notices or lifecycle updates.

Selection Notes

Select this component when a balance of moderate processing performance and ultra-low power consumption is required. The SAM4LS series is suitable for applications needing USB connectivity and capacitive touch sensing without the complexity of LCD controllers found in other family members. Ensure the 48MHz clock speed and available I/O count meet the system's real-time processing demands.

Part Context

This part belongs to the Microchip SAM4L series, which utilizes the ARM Cortex-M4 processor. The SAM4L family is distinguished by its focus on low-power efficiency through picoPower technology. Unlike the SAM4S series which offers higher speeds, the SAM4L prioritizes energy conservation while maintaining sufficient performance for embedded control tasks.

Replacement Considerations

Check for ATSAM4LC4BA-AU if cryptographic features are needed, noting it lacks USB Host capability. Verify pin compatibility with ATSAM4LS4CA-AU for larger package options. Consult the official substitution guide for any end-of-life notifications or recommended upgrades within the SAM4L family.

FAQ

Does the ATSAM4LS4BA-AU support USB Host mode?

Yes, the datasheet specifies that the SAM4LS series includes a USB 2.0 Device and Embedded Host interface.

What is the maximum operating frequency of this microcontroller?

The ARM Cortex-M4 core in the ATSAM4LS4BA-AU runs at frequencies up to 48MHz.

Is there a capacitive touch module included in this device?

Yes, the device integrates a low-power capacitive touch module (CATB) capable of handling up to 32 sensors.