ATSAM4SD16CA-AU

Overview

The ATSAM4SD16CA-AU is a 32-bit microcontroller based on the ARM Cortex-M4 core, operating at up to 120 MHz. It features 1 Mbyte of embedded Flash memory and 128 Kbytes of SRAM within a 100-pin LQFP package. The device includes an integrated voltage regulator, allowing single-supply operation between 1.62V and 3.6V. Connectivity options include USB 2.0 Device, multiple USARTs with IrDA support, SPI, I2C, SSC, and an External Bus Interface (EBI/EMI). Additional peripherals comprise a 16-channel 12-bit ADC, two 12-bit DACs, DMA channels, and a Real-Time Clock.

Feature Summary

• Integrates an ARM Cortex-M4 processor with a 2Kbyte cache and DSP instruction set for high-performance execution.
• Supports external memory expansion via an 8-bit Static Memory Controller compatible with SRAM, PSRAM, NOR, and NAND Flash.
• Includes a dedicated USB 2.0 Device interface with an on-chip transceiver and substantial FIFO buffer.
• Features comprehensive power management capabilities including sleep and backup modes with ultra-low current consumption.

Applications

• Industrial control systems requiring robust peripheral interfaces
• USB-enabled consumer electronics and data acquisition devices
• Smart metering applications utilizing secure boot and memory protection
• Medical equipment needing precise analog-to-digital conversion

Procurement Notes

Verify the specific suffix 'AU' confirms the industrial temperature range (-40°C to 85°C) and lead-free RoHS-compliant packaging. Confirm that the 100-LQFP footprint matches your PCB design constraints. Ensure compatibility with the Advanced Software Framework (ASF) for development. Check for any recent Product Change Notifications regarding assembly locations or marking changes before finalizing orders.

Selection Notes

Select this component when 1 Mbyte of program storage and 128 Kbytes of RAM are required alongside extensive connectivity. The inclusion of EBI/EMI makes it suitable for designs needing external memory expansion beyond internal limits. Choose over SAM4S variants if the 2Kbyte cache and enhanced security features like MPU are necessary. Verify that the 120 MHz speed meets real-time processing requirements without excessive power consumption.

Part Context

This part belongs to the SAM4SD series, which extends the standard SAM4S architecture with added security and external bus capabilities. It maintains pin compatibility with SAM3N and SAM3S products in the 100-pin configuration. The series targets applications demanding both high performance and secure code execution, leveraging the Cortex-M4's hardware multiply and divide units.

Replacement Considerations

ATSAM4SD16CB-CN: Same core and memory but in TFBGA package with extended temperature range. ATSAM4S16CA-AU: Similar specifications but lacks the External Bus Interface and cache. ATSAM4SD16CU-AU: Industrial grade variant; verify suffix differences for temperature or packaging specifics.