27 Nov
2013
27 Nov
'13
8:18 p.m.
On Nov 27, 2013, at 22:09, Al Kossow <aek at bitsavers.org> wrote:
On the KDF11-B, Tx is only single-ended. Rx is differential, but
appears to have a pulldown to ground (at least mine does)
and seems to be pretty happy with Rx- left open; can't guarantee
that other, similar serial connections will be as happy. I usually tie
Rx- to ground to be safe.
- Dave
On 11/27/13 5:39 PM, David Riley wrote:
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.