Having pondered… From the datasheet:-
The CAT811 protects uPs against brownout failure.
Q. Can anyone see if RESET_W connects to anything else on the schematic? I can’t and I suspect that it’s only for the WIZnet chip as an abreviated RESET_WIZnet label.
- What if I removed CAT811? I can live without brownout failure are there are other steps I can take like more capacitors or a 5.5V super capacitor. That would also offer up a nice pad to solder the GPIO wire to.
- Similar to 1, but just cut the track, remove some resist and solder to that.
- Cut the RSTN pin, raise it and solder to that. A bit fiddlier.
Use a driver transistor on the GPIO line to forcefully yank RSTN low for 1 ms. That should be doable without blowing CAT811 up.
Any comments?