I am using the BQ32000DR RTC with FC-135 32.7680KA-A5 crystal , I had not mounted tuning capacitors as already there are 24pf internal capacitors. I am getting below mentioned error .
bq32k 0-0068: Oscillator Failure. Check RTC battery.
bq32k 0-0068: rtc core: registered bq32k as rtc0
I had connected CR-2032 battery as a VBACK supply,
I had powered on the board and set the time to the RTC IC and observed that time is incrementing and working as expected. Once when I power off the board and wait for while and power on the time observed is not appropriate (not updating as expected).
Why is this oscillator used? and Does this oscillator effect the timing?