NY8A051H will enter Standby mode by writing 10b to register bits OPMD[1:0]. At Standby mode, however, FHOSC will not be disabled automatically by NY8A051H and user has to enter slow mode and write 1 to register bit STPHOSC in order to stop FHOSC oscillation. Most of NY8A051H peripheral modules are disabled but Timer can be still active if register bit T0EN/T1EN is set to 1. Therefore NY8A051H can wake-up after Timer0/Timer1 is expired. The expiration period is determined by the register TMR0/TMR1, FINST and other configurations for Timer0/Timer1.
Instruction execution is stop and some peripheral modules may be active according to corresponding module enable bit.
FHOSC can be disabled by writing 1 to register bit STPHOSC.
The FLOSC is still active and running.
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