SPCON_SMOD_SHIFT
#define SPCON_SMOD_MASK (0x03<<SPCON_SMOD_SHIFT)
#define SPCON_SMOD_POLL (0x00<<SPCON_SMOD_SHIFT)
#define SPCON_SMOD_INT (0x01<<SPCON_SMOD_SHIFT)
#define SPCON_SMOD_DMA (0x02<<SPCON_SMOD_SHIFT)