I'm not sure I fully understand the dialog discussed in this thread here where this post was orignally created:Wakeup from deep sleep for unknown reasons...fixed in SDK 2.2
As for waking up from deep sleep unintentionally, are you referring to the P0/Keyscan anomaly, which was something leftover from when this part was used primarily as a keyboard/mouse device?
Described here: Deep Sleep + KeyScan and in numerous other threads.
I created a new thread for your post as these old threads are not policed in the same manner as new ones.
I'm only interested in the fine timer issue. We have a pullup on P0, so that should be ok. I could envision other causes though like some contact problems with the power supply that might have caused a wake up from deep sleep.
We don't really have any further suggestions, but let us know if you have any issues.