Digital IO pull-ups/downs

[Certified Nerd]

I'm wondering if the new RoboRio has internal/built in pull up or pull down resistors for it's IO pins. If it does, do they need to be enabled in the robot code and which one are they? I remember having a very hard time last year trying to find this info on the digital sidecar. :confused: I made my best guess last year, but this year I want to make sure our robot doesn't have floating logic.

[cgmv123]

The Digital Sidecar has integrated pull-up resistors. I'd be very surprised if the roboRIO doesn't as well.

[Aren Siekmeier]

The DIO signal pins are pulled up to 3.3V by a weak 40k resistor. DIO 14 and 15 on the MXP are pulled up to 3.3V with 2.1k resistors for use with I2C.

http://www.ni.com/pdf/manuals/376099a.pdf, page 8.

[Certified Nerd]

Thanks for the info guys. What is the "MXP?" Does it have to do with I^2 C? because I am unfamiliar with I^2 C and have never used it (knowingly).

[Ether]

What is the "MXP?"

https://www.google.com/?gws_rd=ssl#q=site%3Achiefdelphi.com+MXP

[billbo911]

The DIO signal pins are pulled up to 3.3V by a weak 40k resistor. DIO 14 and 15 on the MXP are pulled up to 3.3V with 2.1k resistors for use with I2C.

http://www.ni.com/pdf/manuals/376099a.pdf, page 8.

Thanks for the link!
Just out of curiosity, because this doc is specifically for the "NI MyRio-1950", how do the MyRio and RoboRio compare? Is the RoboRio a re-packaged MyRio?
(I'm sure this has been posted elsewhere.)

[Ether]

Is the RoboRio a re-packaged MyRio?

Yes.

It's mentioned in this video:

https://www.youtube.com/watch?v=NwV_eNpXfO0