(Traffic Light Controller) The description of the traffic-light controller in Section 9.5 assumes that the traffic-light outputs from the state machine are encoded. This saves only two output lines yet introduces the extra complexity (and parts count) of external decoders.
(a) Re-derive the equations for the traffic light control signals, assuming fully decoded outputs from the state machine: HG, HY, HR, FG, FY, and FR. Also show the revised state transition table.
(b) How does this affect the PAL-based implementation? In particular, will you require a PAL with more product terms per output or fewer terms per output?
(c) How does the change affect the ROM-based implementation?