Epson EPL-9000 Service Manual page 23

General Description
Table 1-8. Parallel Interface Pin Assignments
Pin No. Signal Name
1 STROBE
2-9 DATA 1-8
10
BUSY
PE
12
13 SLCT
14 AUTO-FEED
15 NC
16
CHASSIS
17
NC
18
19-30
31
32 ERROR
33
34
35
36
IN
1-12
STROBE is a strobe
computer. The pulse width
IN
Normally it is HIGH, and data is latched at the trailing edge of
this
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 O.
The most significant bit
IN
must be maintained for 0.5
STROBE signal active edge.
is an acknowledge
10 This signal goes LOW
of 1 or
OUT reception is completed,
accept new data.
through
The BUSY signal informs the host computer of the printer
OUT
state. When the
The PE
signal indicates paper
OUT selected through
paper Paper empty is indicated by HIGH.
OUT Use in reverse mode.
IN used.
used.
around level.
connected to the printer chassis. The printer chassis
and the signal
Not connected.
Ground level for the twisted pair return signal.
IN STROBE
This level goes LOW when the printer is:
out of paper
OUT in paper jam state
in error state
off line
Same as for tins19 to 30.
used.
Pulled to
the reverse mode.
Use
used to read data from the host
must be more than
is DATA8. The signal state
on either side of the
with an approximate width
when the data
which indicates that the printer can
with the BUSY signal is specified
is HIGH. the minter cannot
the standard tray
or command, or for the optional
are connected to each other.
is when this
1.0 resistance.
Service Manual
I
0.5&c.
-
is LOW.
Rev.