Click on the or look for the Community License prompt link.
Depending on your license type, you will register your product through official Keil or semiconductor vendor portals:
: Cracked software often causes random compilation errors, broken debuggers, and corrupted hex files.
ARM offers a free, full-featured Community Edition of Keil MDK for non-commercial use, hobbies, and educational purposes. This completely removes the 32KB code size limit.
Using pirated development tools in a commercial or academic setting can lead to severe legal penalties and institutional audits.
Using Different Versions of the Keil IDE On the Same Computer
: Ensure you are using the correct CID, which is a unique 10-character code found in File → License Management .
Copy the official Product Serial Number (PSN) provided publicly by ST for these series.