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Is it possible to return from watch mode without a sub-oscillator?

Latest Updated:03/25/2009

Question:

Is it possible to return from the watch mode, if transiting to watch mode without connecting any sub-oscillator?

Answer:

It is not recommended to transfer to the sub-clock type mode without connecting sub-oscillator. However, the external interrupt (IRQ0) or wake-up function enables to return from the watch mode.

In the case of connecting no sub-oscillator, be sure to fix X1 pin to GND.

 

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H8/300H Super Low Power
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H8/300L Super Low Power
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H8/3854F
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H8 Super Low Power