Keil MDK v5.42a + DFP / C51 v9.61 / C166 v7.57 / C251 v5.60
Posted on: April 21, 2025
Category: Engineering & Specialized
Comments: 5
Add to Favorites
📝 Description
Keil is one of the most established and prominent providers of software tools for electronic and embedded systems development. Known for its comprehensive support for microcontroller families, Keil’s development tools—especially MDK-ARM—are widely used by engineers working with ARM Cortex-M, Cortex-R, and classic 8051 series microcontrollers.
The µVision IDE is the integrated development environment offered by Keil, featuring a complete suite of tools including a source code editor, debugger, project management, and a powerful simulator. The main product is MDK-ARM, but it also supports other toolchains for C51, C166, and C251 architectures through modular installation.
🔧 Features of Keil Development Tools
- Complete Integrated Development Environment (IDE) for compiling, simulating, and debugging
- Full support for various families including:
- ARM Cortex-M, Cortex-R
- 8051, C166, 251, ARM7, ARM9
- Advanced C and C++ programming support for ARM microcontrollers
- Real-time OS support via RTX (Real-Time eXecutive)
- Rich library of GUI components for graphical software development
- Tools and classes for working with TCP/IP networks and USB devices
- Comprehensive collection of examples, templates, and sample projects
See Also:
LogViewPlus 3.1.22 Final + Portable
Adobe Illustrator 2025 v29.5.1 (Windows/macOS)
💡 Notes
- MDK-ARM includes µVision5 IDE and toolchain.
- Other toolchains included:
- C51 for 8051 microcontrollers
- C166 for XC166, C166, and XC2000 series
- C251 for 80251 microcontrollers
- A Keygen is provided for activating all main products (Caution: May be falsely flagged as a virus by some antivirus software—safe to use).
- Includes support tools for legacy ARM7, ARM9, and Cortex-R/M controllers.
- Additional Application Notes, source codes, and sample projects are available online (links provided in the original post).
💻 System Requirements
- Operating Systems:
- Windows Vista / 7 / 8.1 / 10
- Hardware:
- Pentium-class processor
- RAM: 1 GB minimum (2 GB recommended)
- Mouse or compatible pointing device
- Disk Space:
- C51: 200 MB
- C251: 100 MB
- C166: 100 MB
- MDK: 1.4 GB
🖼️ Keil MDK Images
Keil MDK Download link
Official: Download Keil MDK
Alternative: Download Keil MDK
File size
843 MB