28 Nov
2013
28 Nov
'13
7:02 a.m.
On Nov 27, 2013, at 10:09 PM, Al Kossow <aek at bitsavers.org> wrote:
On 11/27/13 5:39 PM, David Riley wrote:
I'm puzzled. RS232 is single ended, not differential. It does need a ground
reference, of course, so you have to make sure the signal ground wire is connected
properly.
paul
The bright side is that you only need
3 pins (Rx, Tx and ground).
Don't forget rx and tx are actually differential receivers and
drivers. Tie rx- (7) to ground (9) on the 10 pin connector.