The Microchip ATSAM3X8EA-AU is a high-performance 32-bit SAM3X microcontroller based on an Arm Cortex-M3 Revision 2.0 core operating at up to 84MHz. It integrates 512KB of dual-bank Flash memory and 96KB of primary SRAM organized as 64KB + 32KB. An additional 4KB NAND Flash Controller RAM buffer can be accessed by the processor when not used by the NFC, giving up to approximately 100KB of SRAM resources.
The device provides extensive connectivity, including 480Mbps USB 2.0 High-Speed Device/Mini Host, a 10/100 Ethernet MAC, two CAN controllers, and an HSMCI interface for SDIO, SD, and MMC. Multiple USART/UART, TWI/I²C-compatible, SPI, and SSC/I²S interfaces support industrial networking, gateways, automation, and advanced embedded-control applications.
Analog resources include a 16-channel 12-bit ADC operating at up to 1MSPS and a dual-channel 12-bit DAC rated up to 1MSPS, together with an integrated temperature sensor. The SAM3X8E also provides up to 103 programmable I/O lines, nine 32-bit timer channels, PWM, RTC, RTT, and extensive DMA resources.
The MCU operates from 1.62V to 3.6V and supports Sleep, Wait, and Backup low-power modes. Integrated MPU, POR, brownout detection, watchdog, internal oscillators, and clock-generation resources support robust embedded system designs.
The exact ATSAM3X8EA-AU orderable part is a Revision A, 512KB Flash device in a 144-lead LQFP package measuring 20 × 20mm with 0.5mm pitch. It is specified for the -40°C to +85°C industrial temperature range. Microchip currently lists the ATSAM3X8E as In Production.
Key Features:
- Manufacturer: Microchip Technology
- Part Number: ATSAM3X8EA-AU
- Family: SAM3X / SAM3X8E
- Device Type: 32-Bit Microcontroller
- CPU Core: Arm Cortex-M3 Rev.2.0
- Maximum CPU Frequency: 84MHz
- Flash Memory: 512KB, 2 × 256KB Dual Bank
- Primary SRAM: 96KB
- NFC RAM: 4KB
- Total Accessible SRAM Resources: Up to Approx. 100KB
- ROM: 16KB
- Operating Voltage: 1.62V to 3.6V
- I/O Lines: Up to 103
- ADC: 16-Channel, 12-Bit, Up to 1MSPS
- DAC: 2-Channel, 12-Bit, Up to 1MSPS
- USB: USB 2.0 High-Speed Device / Mini Host, 480Mbps
- Ethernet: 10/100 MAC
- CAN Controllers: 2
- TWI / I²C: 2
- USART / UART: Multiple
- SPI: Supported
- SSC / I²S: Supported
- SD Interface: HSMCI / SDIO / SD / MMC
- Timer Counter: 9 × 32-Bit Channels
- PWM: Up to 8 Channels
- RTC / RTT: Supported
- DMA: Supported
- MPU: Supported
- Low-Power Modes: Sleep / Wait / Backup
- Operating Temperature: -40°C to +85°C
- Package: LQFP-144
- Package Size: 20 × 20mm
- Lead Pitch: 0.5mm
- Product Status: In Production.
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