How to make a 16f628 Sleep and Wakeup ?

[EarlyBird2]

Hi All

Simple Question I know... But I cannot figure it out...

Both Sleep and nap seem to be for short time durations.....???

What I am looking for is basically an alarm function using the rtcxu.pbp code...

The RTC to be running all the time... The PIC to wake up latch an alarm for X Seconds then go back to sleep.

Ultimately saving me battery power.

Originally I was thinking of using the Hours and Mins VARs as a trigger. But the PIC needs to be awake for this to happen !

Arghhhhhhhhhh......... Hardware is easy ... Software not so.

Any Ideas or links to examples help welcome. I have looked,

Andy

This could be an interesting project for me I can help with the software. Richard's pcf8563 and interrupts look good to me.

[Charlie]

Wake up once per second, check the time, if not alarm time go back to sleep.
The time you are awake is so small, you are still asleep well over 99% of the time.