7i92 PDM and a Spindledriver board that need 5v

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02 Aug 2025 12:53 #332665 by hitchhiker
hi i get a issue...

i have an very old servo driver that needs a 5+ pdm signal about 10khz.
my card i use is a 7i92.. the pdm output is sinking on the 7i92.. correct?
what is the best way to convert it?

thanks

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03 Aug 2025 18:14 #332742 by andypugh
I think that the 7i92 has bare IO pins, and in output mode I would expect them to be pulled-up to 5V when "on"

I would suggest testing with a multimeter.

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03 Aug 2025 19:48 #332753 by PCW
The 7I92 outputs can be sourcing or sinking depending output polarity
But they are push-pull 3.3V outputs. They will swing to 5V if they have
no load as they have 4.7K pullups to 5V.

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