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Any method for securing oscillation stabilization time?

Latest Updated:12/01/2011

Question:

The above says that

"The oscillation stabilization time of the subsystem clock must be secured by software".


What is the method for securing it?

Answer:

One method is to use the interval timer function of the watch timer.
In this case, select the subsystem clock as the clock source with the WTM register, start the watch timer, and wait for the INTWT1 interrupt request flag (WTIIF) to be set by a 9-bit counter overflow.

Suitable Products
UPD78948x