In BF512, when PPI works in RX mode, 2 external frame syncs mode, in hardware manual, it says
we should provide an external pull-down to GND for the PPI_FS3 pin.
However the PPI_FS pin is multiplexing with SPI0 boot CS signal, if we choose SPI0 Flash boot mode, we should connect SPI0_CS to high.
How should we resolve this conflict? Can we connect the PPI_FS3 pin to GND directly? thanks!