Epson Action Laser II - Manual (Page 198)

Interface
Specifications
Note:
All interface conditions are based on TTL level. Both the rise
and fall of each signal must be less than 0.2 microseconds.
Data transfer must be carried out by observing the ACKNLG
or BUSY signal. (Data transfer to this printer can be carried
out only after the receipt of the ACKNLG signal or when the
level of the BUSY signal is LOW. The relationship between
BUSY and ACKNLG can be changed using SelecType. See
Chapter 4.
The column heading “Direction” refers to the direction of
signal flow as viewed from the printer.
“Return” denotes the twisted-pair return to be connected at
signal ground level. For the interface wiring, be sure to use a
twisted-pair cable for each signal and to complete the
connection on the return side. These cables should be shielded
and connected to the chassis of the host computer and the
printer. .
Interface timing
The figure below shows the timing for the parallel interface.
0.5µs min. 0.5µs min.
Varies depending on the Selec Type setting.
0µs typ, 5µs typ, 10µs typ, or ACKNLG
Signal is not changed.
Technical Specifications 8-15