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Hi,
We are seeing strange behavior when configuring the TPS65987 profile to assert GPIO20 using "Port 0 Source Sink Event" when it is Sink. This is the way we have it set up.
There are 2 issues,
1) instead of asserting and stay high, we are seeing a toggle instead, the lines goes high for several milliseconds and then goes back low.
2) When we use same even, simultaneously, with another GPIO (GPIO1 in our case), the GPIO20 does not even change states.
Is this expected behaviour? If not could you please help understand the issue?
Thanks,
Ilya
I made a mistake in initial post about the polarity.
When I set "GPIO Polarity = Inverted Event" I actually see that the GPIO goes low briefly (6-7ms) and then goes back high:
When I set "GPIO Polarity = Direct Event" I see that the GPIO goes high briefly (6-7ms) and then goes back low(shown along side vbus):
So to restate the initial problems I actually see 3 of them.
1) instead of asserting and stay high, we are seeing a toggle instead, the lines goes high for several milliseconds and then goes back low.
2) When we use same even, simultaneously, with another GPIO (GPIO1 in our case), the GPIO20 does not even change states.
3) The polarity of the event doesn't seem to match the GPIO state.
I can share the App Config project if there's a way to upload it "privately".
Thanks,
Ilya
Hi Kedar!
Quick question, what does TI recommends to drive the BQ25713 OtG pin, which we have wired to GPIO1? I believe it ought to be as follows:
The GPIO20 is of opposite polarity as it drives something that needs to be a High when the TPS65987D is sinking and a Low otherwise:
Both must work simultaneously!
Thanks,
Georg A. Mussenden
