u32 rttotsam; /* PRGM=0: total samples register */
};
u32 rtfreqmin; /* frequency count min. limit register */
+#define RTFRQMAX_DISABLE (1 << 20)
union {
u32 rtfreqmax; /* PRGM=1: freq. count max. limit register */
u32 rtfreqcnt; /* PRGM=0: freq. count register */