我可以考虑the High-Z input GPIO as a FLOATING pin to a capacitive load?

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Wed, 2017-12-13 03:53

#1

bemoon

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Last seen:2年3周前

加入:2017-07-19 09:37

我可以考虑the High-Z input GPIO as a FLOATING pin to a capacitive load?

We are developing a sensing system using DA14580, to perform C-V transition .In some cases , we need to connect GPIO to capacitive sensor's electrode , set it to floating in order to mute this capacitive sensor.
We do not know the exact structure of the DA14580 GPIO.
If we config the GPIO as High-Z input, can we consider it as a floating pin to a capacitive load? Is there some risks to use GPIO pin in this method?

Thanks for any advice!

Device:

DA14580

Wed, 2017-12-13 17:10

#2

MT_dialog

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Last seen:1 month 2 weeks ago

加入:2015-06-08 11:34

Hi bemoon,

Hi bemoon,

I am not sure i get the question but yes, if you set the gpio pin to just INPUT then the pin will be in high-z state, they wont be exactly floating because of the clamping diodes, so there will be a small leakage.

Thanks MT_dialog

Thu, 2017-12-14 05:35

(Reply to #2) #3

bemoon

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Last seen:2年3周前

加入:2017-07-19 09:37

Your answer is exactly what

Your answer is exactly what we need！
Thank you very much！