Epson LQ-800 F-3, Figure F-1 shows the timing for the parallel interface, Interface timing, Figure F-1.Parallel interface timing

3.All interface conditions are based on TTL level. Both the rise and the fall times of each signal must be less than 0.2 microseconds.

4.Data transfer must be carried out by observing the ACKNLG or BUSY signal. (Data transfer to this printer can be carried out only after receipt of the ACKNLG signal or when the level of the BUSY signal is LOW.)

Interface timingFigure F-1shows the timing for the parallel interface.Figure F-1. Parallel interface timing

F-3