what is control unit
Control unit is like the conductor of an orchestra, who is responsible for keeping each of the orchestra members in proper synchronization. This unit contains logic and timing circuits that generate the proper signals necessary to execute each instruction in a program.
The control unit fetches an instruction from memory by sending an address and read command. The instruction word stored at the memory location is then transferred to the control unit. This instruction word, which is in some form of binary code, is then decoded by logic circuitry in the control unit to determine which instruction is being called for. The control unit uses this information to send the proper signals to the rest of the units in order to execute the specified operation.
This sequence of fetching an instruction code and then executing the indicated operation is repeated over and over by the control unit.
0 comments:
Post a Comment