91
Printer
Terminal/Host
Pin 2- RxData ……… TxData
Pin 3- TxData ……… RxData
Pin 5- Ground ……… Ground
In general, as long as the data quantity is not too large and you
use Xon/Xoff as flow control, it will be problem free.
Baud rate :
1200, 2400, 4800, 9600(default), 19200 and 38400.
(programmable by command)
Data format :
always 8 data bits, 1 start bit and 1 stop bit.
Parity :
always non parity
Handshaking :
XON/XOFF as well as CTS/RTS (hardware flow
control).
If you run an application with the bundled printer driver under
Windows and use the serial port, you should check the above
parameters and set the flow control to "Xon/Xoff "or "hardware".
92
Parallel (Centronics)
The parallel port is a standard 36-pin Centronics connector. Pin
assignments are as follows:
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 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.
