Specifications

Inferface
The parallel interface connector pin assignments and a description of the
interface signals are shown in the table below.
Signal Return
Pin Pin Signal
Direction Description
1 19 STROBE
IN STROBE pulse to read data.
Pulse width must be at least
0.5 µs at the receiving
terminal.
2
20 DATA 1
IN These signals represent
3 21
DATA 2 IN
parallel data bits 1 to 8,
4
22
DATA 3 IN respectively. Each signal is at
5 23
DATA 4 IN HIGH level when data is
6 24
DATA 5 IN logical 1 and LOW when it is
7 25
DATA 6
IN logical 0.
8
26 DATA 7
IN
9 27 DATA 8 IN
10
28 ACKNLG OUT
About a 1-10-µs pulse width.
LOW indicates data has
been received and the
printer is ready to accept
more data.
11
29 BUSY
OUT
A HIGH signal indicates that
the printer cannot receive
data. The signal goes HIGH in
the following cases.
1. During printing
2. During a printer-error state
12 30 PE
OUT
A HIGH signal indicates the
printer is out of paper
13
—
SLCT
OUT
Pulled up to +5v through
3.3
resistance.
14
—
AUTO
IN
Not used
FEED
15 —
NC
—
Not used
16
—
GND
—
Logic ground level
17
CHASSIS
—
Printer's chassis ground,
GND which is connected to the
signal ground.
18
—
NC
—
Not used
A-6 Technical Specifications