RS-232 wires

all wires active low"0" = -12v, "1" = 12v

special driver chips that generate ±12v from 5v

• TxD – transmit data

• TxC – transmit clock

• RTS – request to send

• CTS – clear to send

• RxD – receive data

• RxC – receive clock

• DSR – data set ready

• DTR – data terminal ready

• Ground

Previous slide

Next slide

Back to first slide

View graphic version