I want to make a simple wristwatch binary clock using a 16F88 or
similar, and to save power I want to put the PIC to SLEEP and awake
during timer interrupts once a second to go about updating registers
and increment minutes and hours when necessary.

I've never dealt with sleep mode or any of the Timers or Watchdog.
What would be recommended to use in this case, and why?
Reading the Mid-Range reference manual, I understand that Timer1 and
the Watchdog Timer can both run during sleep mode and wake the PIC up.

Does one have advantages over the other?

I plan to use the internal RC oscillator at a low speed (31.25 kHz).

Thank you,
Scott
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