CPU Control Types

In a microprogrammed control unit, control signals are generated by a sequence of microinstructions stored in a special memory called the control memory.

Each microinstruction defines a set of control signals that the CPU needs to perform an operation or execute an instruction.

The control unit reads each microinstruction, generating signals to the CPU’s components in a step-by-step manner, enabling more flexible control.

Unlike hardwired control, microprogrammed control can easily be modified by updating the microinstructions, making it adaptable to new instruction sets.

Microprogrammed control is often used in general-purpose CPUs, where flexibility and ease of upgrade are essential.