General Description
Service
I
1-7. Parallel Interface Pin Assignment
Signal Name
Description
STROBE is a strobe pulse used to read data from the host
1
STROBE
IN
computer. The pulse width must be more than 0.5
Normally it is HIGH, and data is latched at the trailing edge of
this signal.
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.
2-9
DATA 1-8
IN
The most significant bit
is
The signal state
must be maintained for 0.5 @cc. on either side of the
STROBE signal active edge.
is an acknowledge pulse with an approximate width
of 1 or 10P. This signal goes LOW when the data
10
OUT
reception is completed, which indicates that the printer can
accept new data. Timing with the BUSY signal is
through
11
BUSY
The BUSY signal informs the host computer of the printer
state. When the signal is HIGH, the printer cannot accept
The PE signal indicates paper empty for the standard tray
12
PE
OUT
selected through
or command, or for the optional
paper cassette. Paper empty is indicated by HIGH.
13
OUT
Use in reverse mode.
14
AUTO-FEED
IN
Not used.
15
NC
.
Not used.
16
Logic ground level.
17
CHASSIS
-
Connected to the printer chassis. The printer chassis
and the signal
are connected to each other.
18
NC
.
Not connected.
19”30
.
Ground level for the twisted pair return signal.
31
IN
The STROBE signal is ignored when this signal is LOW.
This level goes LOW when the printer is:
. out of paper
32
ERROR
OUT
. in paper jam state
. in
state
●
off line
33
.
Same as for pins19 to 30.
34
NC
.
Not used.
35
+5
Pulled up to
through 1.0
resistance.
36
IN
.
Use the reverse mode.
1-1o
Rev.
