The statement is False.
In a microprogrammed control unit, the control signals for instruction execution are stored in a control memory (often a ROM or PLA) in the form of microinstructions. These microinstructions are typically fetched sequentially, and each microinstruction provides control signals for executing a specific step of an instruction.
The term "microprogramming" refers to the use of a sequence of microinstructions to control the execution of machine instructions. The control memory stores the microinstructions, and the control unit fetches and executes them in sequence.
The idea of a microprogrammed control unit is that the control signals for each machine instruction are stored in a microprogram, and the control unit interprets and executes this microprogram.
The use of fixed logic, on the other hand, typically refers to hardwired control units where the control signals are generated directly by combinational logic circuits. In fixed logic, there is no control memory storing microinstructions; instead, the control signals are generated based on the opcode of the instruction.
In summary, microprogrammed control units use a control memory to store and fetch microinstructions, providing a more flexible and easily modifiable control strategy compared to fixed logic.