Keil Logo

Real-Time OS/Kernels

ARM RTOS & Middleware

C166 RTOS & Middleware

C51 OS/Kernels

Further Information

RTX251 Product Overview

The RTX251 Real-Time Kernel has been discontinued.

  • Existing users of RTX251 may still receive technical support from the Keil support knowledgebase.
  • Customers who need an RTOS for the MCS® 251 should check with CMX.
  Arm logo
Important information

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.

Change Settings

Privacy Policy Update

Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers
of your data.