RTC problem about bootloder

[建宽高]

bootloder and the main program configuration is not the same RTC,or no configuration, resulting in boot into the main program internal RTC is not accuracy.RTC Run very fast

RTC config use extern 32.768KHZ

[danielmartynek · Accepted solution]

Hello,

There might be a problem with the LPO Clock Select Register (LPOCLKS) which selects the source clock of the RTC module. The register is s a write-once register, and is reset only on POR or LVD. Please check whether you write more than once to the register.

Regards,

Daniel

[建宽高]

thanks for your reply

Your answer is valid, due to LPOCLKS is write-once register,  main program can not config RTC again.

so， i search < S32K1XX MCU Family Reference Manual(REV 9).pdf>  about anyother write-once register, but i can not found, can you tell me  oher write-once register?

thank you !!!!!!!!!

[danielmartynek]

Hello,

We don't have any list of such registers.

Every register has its own specification in the RM.

Regards,

Daniel

[建宽高]

thanks for your reply