65
Parallel (Centronics)
The parallel port is a standard 36-pin Centronics. Its pin
assignments are listed as following.
Pin
Direction
Definition
Pin
Direction
Definition
1
In
/STROBE
13
Out
SELECT
2
In
Data1
14,15
NC
3
In
Data 2
16
-
Ground
4
In
Data3
17
-
Ground
5
In
Data4
18
NC
6
In
Data5
19~30
-
Ground
7
In
Data6
31
NC
8
In
Data7
32
Out
/Fault
9
In
Data8
33~36
-
NC
10
Out
/ACK
11
Out
BUSY
12
Out
PE
Auto Polling
Both the serial port and parallel port of this printer can be
activated at the same time, i.e the printer can simultaneously
communicate with two PC via different port. However as no port
contention is made for this printer, if both PC transmit data at the
same time to this printer, the data may become damaged in the
receiving buffer.
66
ASCII TABLE
NUL
0
@
P
'
P
SON XON
!
1
A
Q
a
q
STX
"
2
B
R
b
r
XOFF
#
3
C
S
c
s
$
4
D
T
d
t
NAK
%
5
E
U
e
u
ACK
&
6
F
V
f
v
BEL
‛
7
G
W
g
w
BS
(
8
H
X
h
x
)
9
I
Y
i
y
LF
*
:
J
Z
j
z
ESC
+ ;
;
K
[
k
{
FF
,
<
L
\
1
I
CR
-
=
M
]
m
}
SO
RS
.
>
N
^
n
~
SI
US
/
?
O
_
o
DEL
