PSC724_SPI_DATA
#define PSC724_SPI_MASK (PSC724_SPI_DATA | PSC724_SPI_CLK | PSC724_SPI_LOAD)
bits |= PSC724_SPI_DATA;
bits &= ~PSC724_SPI_DATA;
bits |= (PSC724_SPI_DATA | PSC724_SPI_CLK);