Xiamen Rongta Technology Co., Ltd.
www.rongtatech.com
11
The Connection diagram between printer serial interface and POS host serial
interface:
Printer serial interface DB9
POS host serial interface DB9
7. Printer parallel interface
RP80VI printer parallel interface socket is 25PIN Parallel socket, 8 bits
parallel transmission, support BUSY/nAck handshake protocol. Each PIN function of
Printer parallel interface socket is as follows:
PIN
no.
Signal
name
Signal
source
Description
1
/STB
Host
Data gate trigger pulse, it will read-in
data when negative edge
2
3
4
5
6
7
8
9
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
DATA8
DATA9
Host
Host
Host
Host
Host
Host
Host
Host
These signals separately represents NO.1
to No.8 information of Parallel data. And
when logic is 1, it is high level, when
logic is 0, it is low level.
10
nAck
Printer
Printer answering signal, It shows printer
has received previous byte data
11
BUSY
Printer
High level shows printer is busy, it can
not receive data
12
Paper-out
-----
Indicates whether the paper is missing
Paper-out PE.
13
Select
Printer
By resistance to pull high level
18-25
GND
-----
Ground connection, logic low level
15
NError(nFa
ult)
Priner
The resistance pulls up high electrical
level.
8. Printer Ethernet Port
