topic Re: RTC problem about bootloder in S32K

RTC problem about bootloder

建宽高 — Fri, 18 Jan 2019 15:10:09 GMT

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

Re: RTC problem about bootloder

danielmartynek — Fri, 18 Jan 2019 15:54:43 GMT

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

Re: RTC problem about bootloder

建宽高 — Mon, 21 Jan 2019 08:31:23 GMT

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 !!!!!!!!!

Re: RTC problem about bootloder

danielmartynek — Mon, 21 Jan 2019 09:04:29 GMT

Hello,

We don't have any list of such registers.

Every register has its own specification in the RM.

Regards,

Daniel

Re: RTC problem about bootloder

建宽高 — Mon, 21 Jan 2019 09:14:58 GMT

thanks for your reply