Hello everyone,
We saw rtc 15 sec forward deviation in 5 minutes, we using loco clock source.I added below my rtc configuration:
I could use to sub-clock. can you help what's configuration the rtc for 2 option(loco and sub-clok).
some time I see deviation but some time i dont see deviation. The Temperature was stilled in the room. The desk hasnt vibration.
Thank for reply
Hello,
LOCO is an on-chip oscillator and thus is far less accurate than a sub-clock oscillator. Its accuracy is +/- 10% so it cannot be reliable for an accurate RTC.
For an accurate RTC application it is recommended to use a sub-clock oscillator.
If the sub-clock oscillator differs from 32.768 KHz you may need to use the Time Error Adjustment Function which also supported by FSP (see section 23.3.8)
www.renesas.com/.../ra4m2-group-users-manual-hardware