ATSAM4S4BA-UUR

Overview

The ATSAM4S4BA-UUR is a 32-bit microcontroller based on the ARM Cortex-M4 core, operating at a maximum frequency of 120 MHz. It integrates 256 KB of Flash memory and 64 KB of SRAM within a 64-pin Wafer Level Chip Scale Package (WLCSP). The device includes an MPU, a 2 KB cache, and a multi-layer AHB matrix with 21-channel DMA. Connectivity features include FS USB Device, HS SDIO/SD/MMC, three SPI interfaces, two I2C controllers, I2S, two USARTs, and two UARTs. Analog peripherals consist of a 16-channel 12-bit ADC, two 12-bit DACs, a temperature sensor, and an analog comparator.

Feature Summary

• Integrates ARM Cortex-M4 processor with hardware floating-point unit for high-performance signal processing.
• Includes Microchip QTouch capacitive touch support for implementing buttons, sliders, and wheels.
• Features integrated hardware code protection to prevent unauthorized access to on-chip memory.
• Supports low-power operation with RAM retention mode below 25 µA and backup mode at 1 µA.

Applications

• Consumer goods and toys
• Industrial control systems
• Metering devices
• Medical equipment
• 802.15.4 wireless networking

Procurement Notes

Verify the specific package type and pinout compatibility during integration, as the WLCSP form factor differs significantly from standard QFP or QFN packages. Confirm that the design supports the thermal and mechanical requirements associated with wafer-level packaging. Ensure the ordering suffix matches the required temperature range and packaging specifications provided in the official datasheet.

Selection Notes

Select this component when a compact footprint is required alongside 256 KB of program memory and 64 KB of data storage. The WLCSP package is suitable for space-constrained designs where traditional leaded or leadless packages do not fit. Consider the 120 MHz performance and peripheral richness if applications demand efficient handling of connectivity protocols and analog signals within a minimal physical profile.

Part Context

This part belongs to the SAM4S series of microcontrollers, which are designed to offer scalable performance and power efficiency. The series provides pin-to-pin compatibility with SAM4N, SAM3S, SAM3N, and SAM7S devices, facilitating migration across the portfolio. The ATSAM4S4BA variant specifically denotes the 256 KB Flash and 64 KB SRAM configuration within the 64-pin package options.

Replacement Considerations

ATSAM4S4BA-AU

FAQ

What is the primary advantage of the WLCSP package for this MCU?

The WLCSP package offers a significantly smaller footprint compared to QFP or QFN packages, making it ideal for space-constrained portable and wearable applications.

Does the ATSAM4S4BA-UUR support capacitive touch sensing?

Yes, the SAM4S series provides native support for Microchip's QTouch technology, allowing for the implementation of buttons, sliders, and wheels without external components.