Computer Interfacing
Discussions about interfacing and electronics

leave unused pins open or short them together?


       Computer Interfacing Forum Index -> RS232
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New User

Joined: 08 Oct 2010
Posts: 1

Oct 08, 2010 9:30 am

Dear All, I need to interface RS232 with Atmega micro,
I know I should use max232 for that and just connect its ports to RX,TX and GND of my micro, but I'm not sure about connections between RS232 and Max232 because I have seen in one design that unused ports simply leaved open and in another design unused ports short circuited to each other ("CTS and RTS to each other", and "DTR,DSR,and CD all together"). Which of these is a correct design??
Thanks in advance for your attention :D

       Computer Interfacing Forum Index -> RS232
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