OmniPrint OM9500F, Technical Manual

Page: 8 / 23

OM9500F Technical Manual
Rev.
1.0
Document No.: 19B00271 Date: Jan 08, 2018 Page: 8
2.1.5 Serial interface connection example
Host side Printer side
TXD ………………………………… RXD
DSR ………………………………… DTR
RXD
………………………………… TXD
DTR ………………………………… DSR
FG ………………………………… FG
SG ………………………………… SG
NOTES: ◦ Set the handshaking so that the transmit data can be received.
◦ Transmit data to the printer after turning on the power and
initializing the printer.
< Figure 2.1 Serial transmission bit frame >
< Figure 2.2 Line transmission with protocol >
ready busy ready busy
buffer full
buffer emptied
"1"
"0"
"0"
"1"
RxD
DTR
B0 B1 B2 B3 B4 B5 B6 B7 START
PARITY
"1"
"0"
STOP
1 Bit
7 or 8
Bit
None or
1 Bit
1 or 2
Bit