If a GPIO on Orin or Xavier is configured as an input with no internal pull-up and no internal pull-down, what is the worst-case maximum leakage current in or out of that pin?
I want to use a very weak external pull-up or pull-down, and need to determine the value for that resistance.
Thanks in advance,
Chris
For which pins do you need the leakage information?
I was hoping for a more generic answer, but specifically it’s a signal currently assigned to pin 218 on the Xavier NX and the Orin NX SOM.
For pin 218, the internal pull resistance is as follows for each module generally with +/-20% accuracy, so you could use these resistances externally with tighter tolerance as you like:
Xavier NX TOUCH_CLK pin: 100kohm
Orin NX GPIO12 (SOC_GPIO39): 50kohm
I can see internal pull resistances in the pinmux spreadsheet. I was not looking for that information.
I was looking for how much current will go into or out of the pin If I turn off both the pull up and pull down resistors and only have an external source for driving or pulling high or low. In a chip datasheet it’s commonly referred to as input leakage current. I don’t see that information in the datasheet. It’s value is typically listed in nA or μA.
Can you please give some more information about your usecase? What is the voltage that would be used for an external pull up? Is the pin being driven by an open drain output?
The pull-up voltage is 1.8V. It can be pulled low externally.
For Xavier NX TOUCH_CLK and Orin NX GPIO12 (SOC_GPIO39) in GPIO mode, the input leakage current maximum is 80uA.
Thank-you! That seems fairly high, but I appreciate the response.