The NuMaker-UNO-M4 is an industrial-grade IoT development board powered by a Nuvoton NuMicro M467 series Arm Cortex-M4F Ethernet MCU and following the Arduino UNO R4 form factor.
The board also comes with Ethernet, RS485, CAN FD, and a microSD card slot for data logging. Power options include 5V via USB Type-C, 5–5.5V through a DC jack, and external 3.3V/5V through headers. It also features Arduino-compatible headers, push buttons, status LEDs, and a dedicated high-speed USB for power and programming.
Nuvoton NuMaker-UNO-M4 Specifications
- SoC –Nuvoton NuMicro M467SJHAN
- CPU – Arm Cortex-M4 @ up to 192 MHz, with FPU and DSP
- Memory – Up to 512 KB SRAM with 64 KB parity check
- Storage
- Up to 1024 KB Flash with dual-bank, FOTA, and XOM support
- 8 KB LDROM, 3 KB OTP ROM
- Storage – MicroSD card slot
- Connectivity – 4-pin 10/100 Mbps Ethernet connector via RealTek RTL8201FI PHY
- USB – USB Type-C port for programming and power
- Serial
- RS485 connector
- CAN FD interface
- Expansion
- Arduino UNO R4 compatible headers
- I2C header
- Arduino-compatible 6-pin SPI header (instead of ICSP header on Arduino Uno R4)
- Debugging – Nu-Link USB debug interface
- Misc
- 3x status LEDs (Red, Yellow, Green)
- Reset button, 2x User buttons
- Header for thermal sensor and Wi-Fi/LoRa module
- Programming header
- Power slider switch
- Power
- 5V DC via barrel jack or USB-C port
- External 3.3V / 5V via headers
- Unpopulated battery connector
- Dimension – Arduino UNO R4 form factor
In terms of software support, the NuMaker-UNO-M4 supports development in the Arduino IDE. It also supports IAR EWARM and Keil MDK for more advanced programming. More information about the product is available in the user manual found on the product page (see below).
The Nuvoton NuMaker-UNO-M4 is available on the official Nuvoton Direct store for $33.14, but is currently out of stock. Additional information is available on the product page or the press release.
Debashis Das is a technical content writer and embedded engineer with over five years of experience in the industry. With expertise in Embedded C, PCB Design, and SEO optimization, he effectively blends difficult technical topics with clear communication
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Ethernet MCU without rj45 jack? Weird
Yeah very weird indeed
They probably provide an external module with an RJ45 jack, but we could not find photos for it. At first, I thought it might be SPE, but unless I missed something, RTL8201FI does not support it.
Depending on the industry it’s great. Often in Europe for some industries M12D or M12X connectors are a must, and such a board is rare to find, as usually you can’t just desolder the rj45 as you would also lose the magnetics, which clearly are on this board present as a separate package, not a magjack as usual