Hi,
I am using PCF85263A RTC chipset in my product.
It gets faster every day. So, I want to adjust offset register. (24h Offset OFFSET[7:0])
I don't under stand 2 point.
1. I want to slow RTC . Now RTC get faster every day. Then adding or subtracting clock ?
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The correction is made by adding or subtracting clock correction pulses, thereby changing
the period of a single second but not by changing the oscillator frequency.
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2. , Would you explain more about below? once every four hours ? once per minute ?
Correction when OFFM = 0
The correction is triggered once every four hours and then correction pulses are applied
once per minute until the programmed correction values have been implemented
Best Regards
Jae Won
Hi
Please see comment for your questions:
1: A positive value written to the Offset Register will cause the RTC device to run slower and a negative value written to the Offset Register will cause the RTC device to run faster.
2:For the example you can refer to datasheet page37 Figure19