原来针对新唐mcu，keil有免费许可

MDK for Nuvoton Cortex-M0/M23:
The MDK for Nuvoton Cortex-M0/M23 is a license paid by Nuvoton. It is free-to-use for software developers working with Nuvoton devices based on the Arm Cortex-M0 and Arm Cortex-M23 cores.


Keil MDK Nuvoton EditionInstallation & Activation


 

Arm provides software developers working with Nuvoton devices based on the Arm Cortex-M0 and M23 processors with a free-to-use professional tool suite.

The free Keil MDK Nuvoton Edition – Cortex-M0/M23 edition includes the Arm C/C++ Compiler, the Keil RTX5 real-time operating system kernel, and the µVision IDE and debugger.
If you wish to program also Nuvoton's Arm Cortex-M4 based devices, purchase the Keil MDK Nuvoton Edition – Cortex-M0/M4/M23 online.