MR_NBSTOP
CLR(val, MR_CHMODE | MR_NBSTOP | MR_PAR | MR_CHRL | MR_CLKS);
#define NBSTOP_1 __SHIFTIN(0, MR_NBSTOP)
#define NBSTOP_15 __SHIFTIN(1, MR_NBSTOP)
#define NBSTOP_2 __SHIFTIN(2, MR_NBSTOP)