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CCS/TMS320F28377D: Question) GPIO 88 setup

Part Number: TMS320F28377D

Tool/software: Code Composer Studio

Hi, I'm building up 28377D for my application.

I want to use GPIO88 to set gate driving enabling signal. And setting the pin to 0 (ground) can enable a gate driver chip.

When I see the technical manual, I think I should use open drain setting so that I tried several setting but it didn't work.

So, is there any way to set GPIO 88's resistor to make the pin (170) connected to ground/0?

Please let me know. Thank you.