Serial port pin-outs

[dick_james]

Further to the post on H/H gps connecting to laptops etc. I'm doing something similar the hard way. What the pin-outs are for a 9 way D-type 232 port? I know 2 & 3 are transmit and receive but which way round? I think 7 is gnd. Can anyone help?

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[montezuma]

Courtesy of Google:

http://www.airborn.com.au/rs232.html

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[LadyInBed]

9 Pin 25 Pin <--->25 Pin 9 Pin Signal

Pin 5 Pin 7 <---> Pin 7 Pin 5 (Ground-Ground)
Pin 3 Pin 2 <---> Pin 3 Pin 2 (Transmit-Receive)
Pin 7 Pin 4 <---> Pin 5 Pin 8 (RTS - CTS)
Pin 6 Pin 6 <---> Pin 20 Pin 4 (DSR - DTR)
Pin 2 Pin 3 <---> Pin 2 Pin 3 (Receive-Transmit)
Pin 8 Pin 5 <---> Pin 4 Pin 7 (CTS - RTS)
Pin 4 Pin 20<---> Pin 6 Pin 6 (DTR - DSR)

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[tr7v8]

No pin 5 is grd on a db9, 7 is on a 25 way. You only need 3 wires 2, 3 & 5.
You may need to cross 2 & 3 to get it working depneding on what you're connecting to. eg P2-P3 & p3-P2. Try you won't break it.

Jim
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[colvic]

Quite a useful site...thanks


Phil

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