8
Fig.2-3 Pin Assignment of Serial Port
The pin assignment of serial interface is shown in Fig. 2-1:
Pin
No.
Signal
Name
Signal
Directi
on
Sourc
e
Description
1
RXD
input
host
Printer receives data from computer host
2
TXD
output printer Printer transmits control code X-ON/X-OFF
and data to host
3
GND
--------
--
-------
Signal Ground
4
DSR
input
host
Signal “MARK” means the host is busy and
can not receive data.Signal “SPACE”
means the host is ready to receive data.
5
DTR/
RTS
output printer Signal “MARK” means the host is busy and
can not receive data.Signal “SPACE”
means the host is ready to receive data.
6
FG
----
----
Shell ground
Tab.2-1 Pin assignment of serial interface
Note:
①
“Source” denotes the source that signal come from;
②
Logical signal level is EIA
The baud rate and data structure in serial interface mode is 9600bps, 8-bit
data bits, no parity bit and 1 stop bit. The serial interface of SP-POS801 can
be connected to standard RS-232C interface. When it is connected to IBM PC
or its compatible machine, connection can accord to Fig.2-4.
