If you are looking for the evaluation/Lite version of 5.25, you may need to contact Keil support or log into your silver/gold developer account to access historical evaluation binaries. Step 3: Verify the File Details

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.

Navigate to File > License Management in the top menu. Enter your LIC to unlock the full commercial, professional, or cortex-m edition features. If no license is entered, the software defaults to the MDK-Lite evaluation version.

The core IDE was updated to version 5.25.2.0.

If you experience crashes when compiling with Arm Compiler 5 on newer Windows 10 or 11 updates, right-click the compiler executable ( armcc.exe ) in your installation folder and set its compatibility mode to Windows 7.

Accessing previous versions requires a valid Product Serial Number (PSN) or License Code (LIC) . Once entered on the download page, you can select v5.25 from the list of available installers.

Note: For the most secure and fully supported experience, Arm recommends using the latest version of Keil MDK. Installation and System Requirements

| Property | Value | |----------|-------| | Filename | MDK525.EXE | | Size | ~870 MB | | MD5 (unofficial reference) | b5a7a8c3f4d9e1f2a3b4c5d6e7f8a9b1 (example only – verify via official source) | | Digital Signature | Arm Ltd. (timestamped 2018) |

: Includes version 5.06u6, the stable legacy compiler for many industrial and safety-critical projects. Arm Compiler 6