Hi,

I hope you are doing well.

A control unit whose binary control variables are stored in a memory is called as microprogrammed control unit.

A sequence of microinstructions constitutes a micro program.

It deals with various units of software but at the micro level I.e. micro-operation, micro-instruction, micro program, etc.

I hope the above information helps.
All the very best.

To execute an instruction, the control unit of the CPU must generate the required control signal in the proper sequence. There are two approaches used for generating the control signals in proper sequence as Hardwired Control unit and Micro-programmed control unit.