One of the optimizations to reduce the space requirement of the control ROM based design is to club together independent control signals and represent them using an encoded field in the control ROM. What are the pros and cons of this approach? What control signals can be clubbed together and what cannot be? Justify your answer.

What will be an ideal response?

The main pro of this approach is that it would reduce the size of the control signal table (ROM). The con of this approach is that it adds a decoding step to the process, which delays the datapath for generating control signals. This is because drive signals can be grouped, and load signals can be grouped, but not all together because multiple storage elements may need to be clocked in the same clock cycle.