Appendix 2 Fixed Format Rs-232 Transmission Line Illustration - Excell H3 Series User Manual

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Appendix 2 Fixed Format RS-232 Transmission Line
SCALE
DB 9
2 TX
3 RX
5 GND
SCALE
DB 9
2 TX
3 RX
5 GND
Serial Data Transfer/Receive Format
LSB
n , 8 , 1 S
e , 7 , 1 S
o , 7 , 1 S
S : Start bit
STOP: Stop bit
P : Parity bit
03004034
Illustration
RS232 PRINTER
DB 9
3 TX
2 RX
5 GND
PC
DB 9
2 TX
3 TX
5 GND
8-bit data
7-bit data
7-bit data
MSB
1
STOP
0
1
P STOP
0
1
P STOP
0
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