Digital I/O

cancel
Showing results for 
Search instead for 
Did you mean: 

RMC design for sbRIO 9627

Currently, I am designing the RMC board that is used to connected to sbRIO9627. In our application, the GBE (after PHY), High speed USB and C series DIO are not used. How should I address these pins on the RMC connectors? Should these pins be float? or pulled up by a resistor?

 

0 Kudos
Message 1 of 5
(3,568 Views)

 

Sounds like you only need to pull-up if you need to set startup or unconfigured state. If the pins are not being used for anything, it should be fine to let them float. Check the slides attached, they are pretty informative. See also this design guide (less helpful).

 

NI sbRIO-9607/9627 RIO Mezzanine Card Design Guide

http://www.ni.com/pdf/manuals/375536b.pdf

Message 2 of 5
(3,537 Views)

Thank you for your reply. Actually, I have read this guide before. I think the design guide is kind of helpless. It dose not mention how to address those pin when they are not used. It seems that the attached slides do not mention them yet. 

0 Kudos
Message 3 of 5
(3,495 Views)

Did you see this manual as well?

 

NI sbRIO-9607 User Manual
http://www.ni.com/pdf/manuals/375463a.pdf

 

From p. 29:

Note Leave reserved and unused pins disconnected on RMCs.

0 Kudos
Message 4 of 5
(3,470 Views)

Thank you AvatarAang!

The slide you shared is quite helpful.

 
0 Kudos
Message 5 of 5
(2,005 Views)