Hi All ,
I am implementing RTC code on an AVR Atmega2560 I have a 32Khz clock crystal to TSOSC1 which is used by timer2 in async mode. I have configured the clock divide to 8 so the clock to the timer is 32768/8 = 4096. It is a 8bit so a interrupt should be generated every 16hz (4096/256).
So on 16 ticks make one second. If I add up second to make 5 minutes and light an LED on this event , it is happening within 2minutes. Why is this. I have checked the crystal is oscillation at 32Khz.
Has any on encountered this?
BR Rate