What is MTG and MHOLE mean?

Dear Sir

I am hobby for electric design. When I learn the beagle bone black board schematic power manager part. I found that there are MTG1/MTG2/MTG3/MTG4 connect to MHOLE and GNG. I can’t understand what its mean. and where the MTG and MHOLE will connect to another parts of PCB ?

Can somebody explain its mean for me ?


These are grounded mounting holes. They will just connect to the ground plane.

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Thanks for your replay