After installation, open the Pack Installer to download the specific Device Family Packs (DFP) for your microcontroller, as the base installer only includes generic CMSIS files.
This version added initial support for many Cortex-M23 and Cortex-M33 based devices, as well as newer STM32, NXP, and Silicon Labs families. It strikes a balance between supporting modern chips and maintaining backward compatibility. mdk-arm version 5.25 download
Arm Keil maintains an official repository for all legacy versions of their software. After installation, open the Pack Installer to download