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11 years, 2 months ago.
KL25Z RTC accuracy
Is there a way to make the RTC on the KL25Z more accurate? I realize that the 32KHz clock source comes from the SDA chip. I have one KL25Z that is 5 minutes fast every 12 hours!!
Regards,
...kevin
1 Answer
11 years, 2 months ago.
Pretty sure the SDA chip also has no 32kHz oscillator, so it uses its internal 32kHz oscillator, which isn't exactly accurate.
Option 1: Use your own 32kHz crystal. You need to edit mbed-src files a bit, but then it can also work. (No USB anymore though).
Option 2: Sync your RTC with something (radio clock, internet time, gps, etc).
Option 3: External RTC
Accepted Answer