wiu interrupt wake up
Hi member_tdh,
I have search through the 16F88 datasheet,
and found that this maybe the problem you are facing.
You might like to try this out and let all of us know if works.
Thanks
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11.1.2 LOW-POWER MODE OPERATION
The system clock is used to generate the desired baud
rate; however, when a low-power mode is entered, the
low-power clock source may be operating at a different
frequency than in full power execution. In Sleep mode,
no clocks are present. This may require the value in
SPBRG to be adjusted.