Thanks a lot all of you guys ... it's wonderfool to see a lot of help.
I just ordered yesterday some 32,768 MHz crystals in order
to begin to test it.
So after i read (but not understand all) the wonderfool article post by Nick (http://www.gammon.com.au/power
i understand this steps:
- i must run it using the Timer2 trained by an 32MHz external quartz in order to have an accurate time after wake up
- i must program the atmel in order to use 8MHz (i anyway need at last 4Mhz in order to use the RFM12B for rf transmitter)
- for the LED pulse i will use the LOW interrupt wake-up on pin 5 of atmel
(i hope will fill the LOW status, cause now in my program i use the RISING status)
Is everything right until now ?
The Timer2 is work in "Power Down" mode ? ..or it's work only in "Power Save" mode ?
I just must understand about how to program the atmel in this case.
If I understand I can not use the normal flash using the bootloader
cause of use of internal 8MHz RC clock... it is there a bootloader that can use 8MHz internal clock ?
Thanks a lot again