Pin Assignments
Signal
pin
Return
pin
Signal
Direction
Description
1
19
STROBE
IN
STROBE
pulse to read data.
2
3
4
5
6
7
8
9
20
21
22
23
24
25
26
27
DATA 1
DATA 2
DATA 3
DATA 4
DATA 5
DATA 6
DATA 7
DATA 8
IN
IN
IN
IN
IN
IN
IN
IN
These signals represent
information in bits 0 to 7 of
parallel data respectively.
Each signal is at HIGH level
when data is logical 1 and
LOW when it is logical 0.
10
28
ACKNLG
OUT
About a 5-
µ
s pulse. LOW
indicates data has been
received and the printer is
ready to accept more data.
11
29
BUSY
OUT
A HIGH signal indicates the
printer cannot receive data.
The signal goes HIGH in the
following cases:
1) During data entry
(for each character)
2) During initialization
3) During self test,
demonstration, and
default setting printing
4) During a printer-error state
12
28
PE
OUT
A HIGH signal indicates the
printer is in a paper-out state
or in an error state.
13
28
SLCT
OUT
Pulled up to +5 V through
1 k
Ω
resistance
14
30
AFXT
IN
Not used
15
-
NC
-
Not used
16
-
GND
-
Logic ground level
17
-
CHASSIS
GND
-
Printer’s chassis ground,
which is connected to the
logic ground
18
-
Logic H
OUT
Not used
19-30
-
GND
-
Twisted-pair return signal
ground level
L
Hudson User’s Guide
A5 size
Appendix A
10-28-95
DR, pass 2-Rev1
A-10
Technical Specifications
