8
host is ready to receive data.
7
GND
——
——
Signal Ground
20
DTR
Output
Printer
Signal “MARK” means the host is
busy and can not receive
data.Signal “SPACE” means the
host is ready to receive data.
Fig. 2-3 The 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-POS88VI 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.
Fig.2-4 Connection between SP-POS88VI and IBM PC Serial Interface Sketch Map
The pin assignment of DB9 interface is as below shows:
Pin No.
Signal Name
Source
Description
2
TXD
Printer
Printer transmits control code
X-ON/X-OFF and data to host
Printer
25PIN
IBM PC
DB9
Printer
25PIN
IBM PC
DB25
