: You can register for a Community license directly through the Keil License Management window within the IDE. Arm Developer 3. MDK-Lite (Evaluation) Version If you do not qualify for the above, the default MDK-Lite edition is free but has a 32KB code size limit . Other tools, like the C51 evaluation version , are limited to How to Apply a Legal License Key
: Full access to the Keil MDK editor, debugger, and the ARM Compiler 6 without the 32 KB code limit.
