The NuMaker-M091YD is an evaluation board for Nuvoton NuMicro M091 series  microcontrollers. The NuMaker-M091YD consists of two parts: an M091 target board and an on-board Nu-Link2-Me debugger and programmer. The NuMaker-M091YD is designed for project evaluation, prototype development and validation with power consumption monitoring function. The NuMaker-M091YD is suitable for analog sensor applications developing which need OPA operation.

The M091 target board is based on NuMicro M091YD2AE. For the development flexibility, the M091 target board provides the extension connectors, the Arduino UNO compatible headers and the capability of adopting multiple power supplies. Furthermore, the Nuvoton-designed ammeter connector can measure the power consumption instantly, which is essential for the prototype evaluation . Additionally, the M091 target board implements OPA function.

In addition, there is an attached on-board debugger and programmer “Nu-Link2-Me”. The Nu-Link2-Me supports on-chip debugging, online and offline ICP programming via SWD interface. The Nu-Link2-Me supports virtual COM (VCOM) port for printing debug messages on PC. Besides, the programming status could be shown on the built-in LEDs. Lastly, the Nu-Link2-Me could be detached from the evaluation board and become a stand-alone mass production programmer.