In our design we are using K66 controller with MQX RTOS. For RTC we are provided a crystal 32.768Khz and VBAT 3.3V. With MQX API's we are able to set time and it's working fine. even though we provided battery for RTC after power off RTC showing default time. For testing after setting the rtc we read back the register value and it is also fine. Could you please suggest anything we are missing?
Thanks in advance,