Table 1-8. Parallel Interface Pin Assignments - Epson ActionLaser 1600 Service Manual

Table 1-8. Parallel Interface Pin Assignments

Pin Signal
No. Name
1 STROBE
2-9 DATA 1-8
10 ACKNLG
11 BUSY
12 PE
13 SLCT
14 AUTO-FEED
15 NC
16 GND
17 CHASSIS
GND
18 NC
19-30 GND
31 INIT
32 ERROR
GND
33
34 NC
35 +5
36 SLCT IN
EPSON ActionLaser 1600 Service Manual
I/O
IN STROBE is the pulse used to read data from the host
computer. Pulse width must be more than 0.5 µsec.
Normally it is HIGH, and data is latched at the trailing
edge of this signal.
IN DATA 1 to 8 are parallel data bits. When the signal is
HIGH, the data bit is 1, and when it is LOW, the data bit
is 0. The most significant bit (MSB) is DATA 8. The
signal state must be maintained for 0.5 µsec. on either
side of the STROBE signal's active edge.
OUT ACKNLG is the acknowledge pulse, with an approximate
width of 1 or 10 µsec. This signal goes LOW when data
reception is completed, indicating the printer can accept
new data. Timing with the BUSY signal is specified
through SelecType.
OUT The BUSY signal informs the host computer of the printer
state. When the signal is HIGH, the printer cannot
accept data.
OUT PE indicates paper empty for the standard cassette,
selected by SelecType or command, or for the optional
paper cassette. Paper empty is indicated by HIGH.
OUT Pulled up to +5 V through a 1.0K-ohm resistor.
IN Not used.
—
Not used.
—
Logic ground level.
— Connected to the printer chassis. The printer chassis
GND and the signal GND are connected to each other.
—
Not connected.
—
Ground level for the twisted pair return signal.
IN The STROBE signal is ignored when this signal is LOW.
OUT This level goes LOW when the printer is:
Ž out of paper
Ž paper jam
Ž in error state
Ž off line
—
Same as for pins 19 to 30.
—
Not used.
—
Pulled up to +5 V through 1.0K-ohm resistance.
— Uses reverse mode
Printer Features
Description
1-19