The FMC sub-card can be connected to two pcie standard M.2 interfaces

The FMC sub-card can be connected to two pcie standard M.2 interfaces, can be used to connect M.2 ssd solid-state hard drives, and only supports pcie The control signal is pulled to 3v3 through the level conversion chip, which can be adapted to bottom board adj 1V8,2V5,3V3.