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TPS2384: POE asserted with no external ethernet device connected

Part Number: TPS2384

Using tps2384 in our poe switch design.

Occasional failure. POE asserted with no external ethernet device connected even after a power cycle.

Rework and replace tps2384 fixes problem.

Question what internal registers should i examine to determine what is going on.

Are there any register bits that could override the detection mechanism and leave POE asserted all the time.

thanks

Paul