ATSAM4LS4CA-AU

Overview

The ATSAM4LS4CA-AU 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 within a 100-lead TQFP package (14x14mm). The device supports a single power supply ranging from 1.68V to 3.6V and includes picoPower technology for ultra-low power consumption. Key peripherals include USB 2.0 Device/Host, four USARTs, one SPI, four TWI interfaces, a 16-channel 12-bit ADC, and a 10-bit DAC.

Feature Summary

• Integrates picoPower technology to minimize active current consumption while maintaining high performance.
• Includes an Advanced Encryption System (AES) module for secure data encryption and decryption.
• Features a capacitive touch module supporting autonomous detection for multiple sensors.
• Supports direct peripheral-to-peripheral communication via the Peripheral Event System.

Applications

• Battery-powered consumer electronics requiring low standby currents
• Industrial control systems utilizing serial communication protocols
• Secure IoT devices requiring hardware-based encryption
• Audio applications supported by I2S controllers and audio bitstream DACs

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature range. Ensure compatibility with existing PCB footprints for the 100-TQFP configuration. Confirm that the selected variant meets all functional requirements for flash size and peripheral availability before finalizing procurement orders.

Selection Notes

Select this component when a balance of moderate processing speed and ultra-low power modes is required. The SAM4LS series lacks the LCD controller found in the SAM4LC series but offers comparable connectivity options. Evaluate the need for the integrated AES module if security is a primary design constraint compared to other members of the SAM4L family.

Part Context

This part belongs to the SAM4L series of microcontrollers designed for low-power applications. The SAM4L family utilizes picoPower technology to achieve significant energy savings across various sleep modes. It serves as a solution for applications demanding efficient power management alongside robust peripheral integration and cryptographic capabilities.

Replacement Considerations

ATSAM4LS8CA-AU

FAQ

Does the ATSAM4LS4CA-AU support segment LCD driving?

No, the SAM4LS sub-series does not include a segment LCD controller; this feature is available only in the SAM4LC sub-series.

What is the maximum operating frequency of the core?

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