ATSAM3N00AA-AU

Overview

The ATSAM3N00AA-AU is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum frequency of 48MHz. It features 16KB of embedded Flash memory and 4KB of SRAM. The device supports a supply voltage range of 1.62V to 3.6V and includes an internal oscillator. Connectivity options include I2C, IrDA, SPI, and UART/USART interfaces. It provides 34 general-purpose I/O pins and integrates peripherals such as DMA, PWM, WDT, POR, and BOD. The unit is housed in a 48-LQFP package with dimensions of 7x7mm.

Feature Summary

• Integrates ARM Cortex-M3 processor with Thumb-2 instruction set support
• Includes embedded voltage regulator for single-supply operation
• Supports pin-to-pin compatibility with SAM7S legacy products
• Features built-in bootloader routines and In-Application Programming capabilities

Applications

• Industrial automation systems
• Smart grid applications
• Medical equipment controllers
• Building and home control devices
• Test and measurement systems

Procurement Notes

Verify the manufacturer designation, as Atmel was acquired by Microchip Technology; official documentation may list either name. Confirm the specific suffix 'AU' corresponds to the standard tape-and-reel or tray packaging requirements for your assembly line. Ensure the component meets RoHS compliance standards required for your target market. Cross-reference the datasheet revision date to confirm current specifications before finalizing procurement orders.

Selection Notes

Select this model when design constraints require low pin count with essential connectivity like UART and SPI. It serves as a direct migration path from older SAM7S devices without PCB layout changes. Choose this variant over higher-memory models if code size fits within 16KB. Verify that the 4KB RAM suffices for real-time data processing needs. Consider the 48MHz speed limit against application timing requirements.

Part Context

This component belongs to the SAM3N series, designed for cost-sensitive embedded applications. It bridges the gap between legacy ARM7TDMI architectures and modern Cortex-M efficiency. The series emphasizes power efficiency and ease of integration into compact designs. It supports the Advanced Software Framework for accelerated development cycles.

Replacement Considerations

ATSAM3N00A-AU: Offers identical functionality but with 32KB Flash and 8KB RAM instead of 16KB/4KB.

FAQ

Is the ATSAM3N00AA-AU compatible with SAM7S devices?

Yes, it is pin-to-pin compatible with 48-pin SAM7S legacy products, allowing for easier migration.

What type of oscillator does this MCU use?

It utilizes an internal oscillator, eliminating the need for external quartz or ceramic resonators.