72
Serial
The RS232 connector on the printer side is a female, DB-9.
Pin
Direction
Definition
1
Shorted to Pin 6
2
In
RxData
3
Out
TxData
4
N.C.
5
Ground
6
Shorted to Pin 1
7
Out
RTS
8
In
CTS
9
Out
+5V
Note :
Pin 9 are reserved for KDU (keyboard device unit), therefore
do not connect these pins if you are using a general host like
a PC.
73
Parallel (Centronics)
The parallel port is a standard 36-pin Centronics, which complies
with IEEE 1284 standard (compatibility mode). Pin assignments
are as follows:
Pin
Direction
Definition
Pin
Direction
Definition
1
In
n/STROBE
16
-
Ground
2~9
In
Data 1~8
17
-
Chassis
Ground
10
Out
nACK
18
-
Peripheral
High
11
Out
BUSY
19~30
-
Signal
Ground
12
Out
PE
31
In
nINIT
13
Out
SELECT
32
Out
nFAULT
14
In
nAUTOFEED 33~35
-
N.D.
15
-
N.D.
36
In
nSELECTIN
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 PCs via different ports. However as no port
contention is made for this printer, if both PCs transmit data at the
same time the data may become damaged in the receiving buffer.
