How can we use the concept of microprogramming to implement a control
unit? Consider that for each micro-operation, all that the control unit is allowed to
do is generate a set of control signals.Thus, for any micro-operation, each control line
emanating from the control unit is either on or off. This condition can, of course, be
represented by a binary digit for each control line. So we could construct a control
word in which each bit represents one control line.Then each micro-operation would
be represented by a different pattern of 1s and 0s in the control word.