Pull-Up DIO Lines to 5V

[otheredward]

Hello, I'm using the NI PCIe FPGA 7852R card. When configured for output the DIO lines go from low, zero volts, to high, 3.3V. My application requires going from 0 to 5V. The manual for this card says an external pull-up resistor can be used to achieve 5V output from the card. I'm not sure how this is done, can any one recommend how to do this? Or, can anyone point me to documentation that details how to do this?

Thanks,

Ed

[GregFreeman]

This should help

[RTSLVU]

Simply place a resistor from the DIO port to +5 Volts.

The value is not super critical but less than 10k Ohms is a waste of power. 

[GregFreeman]

All kidding aside, here's a more detailed link then my original one if you want to know more about the workings of a pullup/pulldown resistor

[clippers]

From ni support:

Rp = 5.765 kOhms

http://digital.ni.com/public.nsf/allkb/D58C269F7771770E86256F490082E6C8

[otheredward]

Thanks for the advice. I'm unclear what exactly connecting a resistor between the DIO port and +5V means. Do you mean the whole DIO port (8 lines) or each line I want to use? Do I connect the resistor from the DIO line directly to +5V on the board?

Thanks.

[smercurio_fc]

Your question is a very basic electrical engineering question, which leads me to believe you are either a student or an intern. Please read the documentation that has already been provided to you thought the links to understand what a pull-up resistor does. The pull-up resistor only acts on a single line it does not act on a full port. Here's another one: http://en.wikipedia.org/wiki/Pull-up_resistor