NY8A051H will enter Slow mode by writing 0 to register bit SELHOSC. At Slow mode, FLOSC is selected as system oscillation in order to save power consumption but still keep IC running. However, FHOSC will not be disabled automatically by NY8A051H. Therefore user can write 0 to register bit STPHOSC (OSCCR[1]) in slow mode to reduce power consumption further. But it is noted that it is forbidden to enter slow mode and stop FHOSC at the same time, one must enter slow mode first, then disable FHOSC, or the program may hang on.
Instruction execution is based on FLOSC and all peripheral modules may be active according to corresponding module enable bit.
FHOSC can be disabled by writing 1 to register bit STPHOSC.
IC can switch to Standby mode or Halt mode by programming register bits OPMD[1:0].
IC can switch to Normal mode by writing 1 to SELHOSC.![]()
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