Select the latest maintenance release (usually ). 2. MDK Legacy Support Pack
As of 2023–2025, Arm encourages migration to Compiler 6; direct public downloads of ARMCC 5 are unavailable without a license or legacy maintenance. keil arm compiler version 5 download
: You will need to log in to your Arm account to access the download. Correct Variant : Ensure you download the Win32 package for Windows Select the latest maintenance release (usually )
After this, when you open a project properties (Project → Options for Target → Target tab), you can choose or explicitly select "ARM Compiler 5.06u7" . Arm encourages migration to Compiler 6