ATSAM4S8CA-AU

Overview

The ATSAM4S8CA-AU is a 32-bit microcontroller based on the ARM Cortex-M4 core, operating at a maximum frequency of 120 MHz. It features 512 KB of Flash memory and 128 KB of SRAM. The device includes an MPU, a 2 KB cache, and a multi-layer AHB matrix with 21-channel DMA. Connectivity options include FS USB Device, HS SDIO/SD/MMC, three SPIs, two I2Cs, I2S, two USARTs, and two UARTs. Analog peripherals consist of a 16-channel 12-bit ADC, two 12-bit DACs, an analog comparator, and a temperature sensor. Control features include four 16-bit PWMs, six 16-bit timers, WDT, RTT, RTC, CRC unit, POR, BOD, and up to 79 I/Os. It operates within a voltage range of 1.62V to 3.6V and supports an industrial temperature range of -40°C to +85°C in a 100-pin LQFP package.

Feature Summary

• High-performance processing via ARM Cortex-M4 core with integrated MPU and optional cache for increased system performance.
• Integrated hardware code protection mechanisms including memory access prevention, secure chip erase support, and hardware CRC checks.
• Native support for Microchip QTouch capacitive touch technology for implementing buttons, sliders, and wheels.
• Rich peripheral set supporting high data rate communication through multi-layer bus matrix and multi-channel DMA.

Applications

• Consumer goods and toys
• Industrial control systems
• Metering devices
• Medical equipment
• Test and measurement instruments

Procurement Notes

Verify the specific ordering suffix against official documentation to ensure correct package type and temperature rating. Confirm that the 'AU' suffix corresponds to the standard industrial temperature range and LQFP packaging as specified in the datasheet. Cross-reference the full part number with the manufacturer's current ordering guide to validate availability and any potential design changes or obsolescence notices prior to procurement.

Selection Notes

Select this component when a balance of high processing speed and moderate memory density is required for embedded applications. The inclusion of native QTouch support makes it suitable for interfaces requiring capacitive sensing without external controllers. Consider the pin-to-pin compatibility with SAM4N, SAM3S, and SAM7S series if migrating from legacy designs. Ensure the application benefits from the integrated hardware security features and low power consumption modes.

Part Context

The ATSAM4S8CA-AU belongs to the SAM4S microcontroller family, which extends Microchip's portfolio with scalable performance and power efficiency. This series is designed to offer increased performance through the Cortex-M4 core and rich peripheral sets for connectivity and system control. It provides pin-to-pin compatibility with previous generations like SAM3S and SAM7S, facilitating easier migration paths for existing designs while offering higher memory densities and enhanced features.

Replacement Considerations

Pin-to-pin compatible alternatives within the same package include other members of the SAM4S family such as ATSAM4S16CA-AU or ATSAM4S4CA-AU, depending on memory requirements. Legacy migration targets include SAM3S and SAM7S series devices. Verify functional equivalence regarding peripheral availability and software compatibility before substituting.