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Sorry for spamming the thread but replacing yield(); with Ethernet.loop(); made a major improvement: edge-to-edge is 62nS. I can live with that. Thank you!

Apologies, I spoke too soon. I realized that I was putting the code in its own while(1) loop to cut everything else out so it wasnt really parsing anything since your library relies on yield(). So I am back to being desperate! What are the limitations and bottlenecks here? Can udp.parsepacket()...

Wow Thank you! I was about to post in desperation because the Udp.parsePacket() in the Nativeethernet lib takes forever to compute. I thought I do one more look in the forums before I do that and I'm glad I did. If I fasttoggle a pin with just Udp.parsePacket() in the loop I get a 1.4MHz clock...

Quick update: I've added 33ohm series resistors to each data line on the phy side as recommended in the application note. Unfortunately, I see 7V spikes on the Phy, which is above the maximum rating of the chip. On the bright side, I haven't been able to get the chip to fail after repeated...

I've been pulled into other project atm but please keep in mind that these events only occur if you use passive PoE AND you are hotplugging cables. If you power up/down from your supply and/or use a power negotiating PoE you should be fine. Hope thats helpful

Some updates. I took the teensy out and probed the data lines on one of the pairs. I used a 6" and a 100ft CAT 5 to see the effect of input LC and I tested with and without the UCLAMP diodes. Here are the results. As you can see the TSV diodes make a huge difference, but not enough to protect...

Hey, just saw you responded. I came back to report that the adding a parallel TSV diode (P/N: UCLAMP3301D.TCT with no resistor) as described in the article didn't work for me. I blew another PHY after hotplugging with a load. I'm going to hook thinks up to a scope to get more measurements. My...

You probably wont have this problem with active PoE because the power isn't enabled until negotiation, so hotplug events wont happen the same way they would with passive PoE.

Hot-plugging a passive PoE connection will blow your teensy PHY. Even though the PHY is DC-isolated from the jack, the unbalanced condition that occurs while hot plugging a powered cable will cause a transient spike of the order of your PoE voltage on your PHY. If you actually make this mistake...

Appreciate the prompt support, Paul.

Hi, I'm designing a baseboard for the Teensy 4.1 that makes use of the native ethernet pins which are broken out to the center of the teensy. I need to know the location of the 2x3 2mm pitch header with respect to the GPIO pins. I couldn't find that info on...