ATSAM4LS8BA-AU

Overview

The ATSAM4LS8BA-AU is a 32-bit microcontroller based on the ARM Cortex-M4 core, operating at frequencies up to 48MHz. It features 512KB of embedded Flash memory and 64KB of SRAM within a 64-lead TQFP package. The device incorporates picoPower technology for ultra-low power consumption, supporting active modes down to 90µA/MHz with configurable voltage scaling. Key peripherals include a USB 2.0 Device interface, four USARTs, one SPI, four TWI interfaces, a 16-channel 12-bit ADC, and a capacitive touch module.

Feature Summary

• Integrates picoPower technology enabling ultra-low power operation across multiple sleep modes including Wait, Retention, and Backup.
• Includes an embedded hardware capacitive touch module (CATB) supporting autonomous detection for up to 32 sensors.
• Features a full-speed USB 2.0 device interface with an on-chip transceiver and support for multiple endpoints.
• Provides direct peripheral-to-peripheral communication capabilities via the Peripheral Event System and DMA controller.

Applications

• Battery-powered wearable devices requiring low standby current
• Industrial control systems utilizing serial communication protocols
• Consumer electronics incorporating capacitive touch user interfaces

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature range. Ensure compatibility with required voltage levels and pin configurations before integration. Cross-reference the datasheet revision to validate peripheral availability and electrical characteristics for the specific manufacturing lot.

Selection Notes

Select this component when high-performance processing combined with ultra-low power consumption is required. The SAM4LS series is suitable for applications needing extensive I/O and communication interfaces without segment LCD or AES encryption features found in other sub-series variants.

Part Context

This part belongs to the SAM4L family of low-power microcontrollers designed for battery-operated applications. It shares the same core architecture as the SAM4LC series but excludes the Segment LCD controller and Advanced Encryption Standard module, focusing instead on general-purpose connectivity and touch sensing capabilities.

Replacement Considerations

Consult the SAM4L Series Summary document for verified substitute part numbers within the same family. Ensure functional equivalence regarding memory size, package dimensions, and peripheral sets before substitution.