ATSAME70N21B-CN

Overview

The ATSAME70N21B-CN is a 32-bit microcontroller from the SAM E70 series, featuring an ARM Cortex-M7 core operating at a maximum frequency of 300 MHz. It integrates 2 MB of Flash memory and 384 KB of SRAM within a 100-pin LFBGA package. The device supports a supply voltage range of 1.7 V to 3.6 V and includes 75 general-purpose I/Os. Peripheral interfaces include SPI, UART/USART, and USB. It features 12-bit ADC and DAC resolution with 10 ADC channels and operates within a temperature range of -40°C to +105°C.

Feature Summary

• ARM Cortex-M7 processor core with FPU and DSP extensions for high-performance computing
• Integrated dual-bank Flash memory with 16 KB ROM for robust code storage
• Multiple communication interfaces including USB, SPI, and UART/USART
• High-resolution analog peripherals with 12-bit ADC and DAC capabilities

Applications

• Industrial control systems requiring high processing density
• Human-machine interface (HMI) displays
• IoT gateway devices
• Motor control applications

Procurement Notes

Verify the specific package type and pinout compatibility during integration, as the LFBGA-100 form factor requires precise PCB layout considerations. Confirm that the selected development tools support the SAM E70 series architecture. Ensure environmental ratings meet the operational requirements, specifically the extended temperature range. Cross-reference the datasheet for any specific ordering suffixes or regional variants that may affect availability or specifications.

Selection Notes

Select this component when a balance of high computational performance and moderate I/O count is required in a compact footprint. The 100-pin LFBGA package offers a space-efficient solution compared to larger QFP options while maintaining access to essential peripherals. Consider the 300 MHz clock speed for applications demanding real-time signal processing or complex protocol handling without external processors.

Part Context

This part belongs to the Microchip SAM E70 family, designed for high-performance embedded applications. It shares architectural similarities with other SAM E70 variants but differs in package and I/O configuration. The series is known for integrating Ethernet MAC and USB controllers, though specific peripheral availability varies by model. It serves as a successor to earlier AVR32 architectures, offering improved power efficiency and processing throughput.

Replacement Considerations

ATSAMS70N21B-CN is the industrial-grade variant of the ATSAME70N21B. Verify if the commercial-grade version meets thermal requirements. Other SAM E70 models like ATSAMS70Q21B offer more I/Os but require different footprints.