Hello everyone, I have a BG77 module on a custom PCB, I followed the manufacturer’s recommendation for the GNSS circuit, but as soon as I plug in my module the resistance heats up, I also noticed that the RFIN pin is shorted to ground (before soldering it to the PCB) ?
RFIN is not a ground short circuit. Since the RFIN in the module is connected in series with an inductor, if you use a multimeter to test, it will show a short circuit.
I suggest you refer to the hardware reference design manual of BG77.