Hi Team,
I have a question about the TPS23861 PoE controller used in our ethernet switch.
When TPS being used in semi-auto mode while PoE port functionality being deactivated via switch firmware (means PWON1-4 bits in register 19h won’t get set) - we plug in a class 4 PoE device.
Then the TPS Interrupt pin is pulled low through Classification Event. Our system reads out a few registers to find out which class the PoE device has and clears the Interrupt via CoR on Detect/Class Enable register 14h. Then again the TPS is pulling the Interrupt low after new classification and system clears it again. This process repeats to a certain point where the TPS is not sending an Interrupt anymore (Interrupt pin stays high). Replugging the device does not change that. Sometimes it only takes one minute to reach this effect and sometimes it takes up to 20 minutes.
I wanted to ask if there’s any kind of counter/timer realized in the TPS functionality that keeps it from continuing the mentioned process forever?
Best regards
Simon