ATSAM4SD16CA-AN

Overview

The ATSAM4SD16CA-AN is a 32-bit microcontroller based on the ARM Cortex-M4 core, operating at up to 120 MHz. It features 1 MB of embedded Flash memory organized in dual banks with optional cache, and 160 KB of SRAM. The device includes an internal voltage regulator, power-on reset, brown-out detector, watchdog timer, real-time clock, and RTC. Connectivity options include USB 2.0 Full-Speed Device, High-Speed SDIO/SD/MMC, three SPIs, two I2Cs, I2S, two USARTs, and two UARTs. Analog peripherals consist of sixteen 12-bit ADCs, two 12-bit DACs, an analog comparator, and a temperature sensor. Control features include four 16-bit PWMs and six 16-bit timers. It supports up to 79 I/O pins and utilizes a 100-pin LQFP package.

Feature Summary

• Built-in hardware code protection prevents unauthorized access to on-chip memory and ensures software confidentiality through a unique 128-bit ID and scrambled external bus interface.
• Native support for Microchip QTouch capacitive touch technology enables easy implementation of buttons, sliders, and wheels without complex software overhead.
• Multi-layer AHB bus matrix and multi-channel DMA support high data rate communication and distributed memory access for improved system performance.
• Pin-to-pin compatibility with SAM4N, SAM3S, SAM3N, and SAM7S devices facilitates seamless migration within the Microchip MCU portfolio.

Applications

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

Procurement Notes

Verify the specific ordering suffix 'AN' indicates the -40°C to 105°C extended temperature range option for the LQFP package, as standard suffixes may differ. Confirm package type matches design requirements. Check current datasheet revisions for any updates to electrical characteristics or pin assignments before finalizing procurement.

Selection Notes

Select this component when high-performance processing combined with extensive connectivity and security features is required. The dual-bank Flash architecture supports robust boot loader implementations. Ensure the application benefits from the integrated QTouch capabilities and low-power modes, including RAM retention below 25 µA. Verify that the 100-pin LQFP footprint fits the PCB layout constraints.

Part Context

This part belongs to the SAM4S series of 32-bit MCUs, which extend Microchip's Cortex-M-based portfolio. The series offers scalable performance up to 120 MHz and memory densities up to 2 MB Flash. It is designed for applications requiring rich peripheral sets for connectivity, system control, and analog interfacing, targeting markets like industrial control and metering.

Replacement Considerations

ATSAM4SD16CA-AU (Standard Temperature Range)

FAQ

Does the ATSAM4SD16CA-AN support native capacitive touch sensing?

Yes, the SAM4S series provides native support for Microchip's QTouch technology, allowing for the implementation of buttons, sliders, and wheels.

What is the maximum operating frequency of the ATSAM4SD16CA-AN?

The device operates at a maximum frequency of 120 MHz, supported by a Flash read accelerator and optional cache memory.