[devit]

That's the number of times per second the main update code runs and it has nothing to do with the number of clock cycles or instructions per second the CPU can run (other than the fact that the chip needs to be fast enough to have the update code finish before the next time it needs to start).

[jaywalk]

Exactly this. A chip running at 50hz would never be able to run a task 50 times per second when it's only executing 50 instructions per second.

[sandGorgon]

ah thanks! that makes it so much clearer.