routine for calibrating RTC
Posted: Fri Jul 22, 2011 8:03 am
Hi
I use RTC and I need a way to calibrate the clock capacitor without a scope,
the RTC gives output of 1HZ Im thinking to dispay on lcd the number of muc pulses that i count in 1HZ of rtc and then I know that if I have 12MHZ crystal I should change my cap until I see 12000000 on the LCD
what do you say will it give me good accuracy?
and how can I count the pulses of my mcu frequency?
I use RTC and I need a way to calibrate the clock capacitor without a scope,
the RTC gives output of 1HZ Im thinking to dispay on lcd the number of muc pulses that i count in 1HZ of rtc and then I know that if I have 12MHZ crystal I should change my cap until I see 12000000 on the LCD
what do you say will it give me good accuracy?
and how can I count the pulses of my mcu frequency?