control bus definition architecture
In a digital computer
, the signal paths that carry commands from the instruction decode logic to various different functional units such as the ALU
, memory address register, memory data register and other buffers
Named by analogy with the address bus
and data bus
, each of which carries a set of related signals, the signals carried by the control bus are more independant.
Some might include other signals such as timing (clock
) and status under the term, further reducing its similarity to other busses.