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