What is a question about this article? If the question is unanswerable, say "unanswerable".

The sequence of operations that the control unit goes through to process an instruction is in itself like a short computer program, and indeed, in some more complex CPU designs, there is another yet smaller computer called a microsequencer, which runs a microcode program that causes all of these events to happen.

In some CPU designs there is tinier computer called what?
microsequencer