以下为原文
I want to increase MCU deep sleep interval. MCU wakeup will be done by watch dog timer.But with watch dog timer0 & timer1 i can achieve up to 2 secs.But requirement is more than 2 sec So i found a way is cascading two timers.One will act as period counter & another will act as prescaler .But i dont know how implement this using Watchdog API.
Another way is to decrease clock but same for clock how to reduce it for WDT?
Is there any other possible way ?