MCXN236 RTC

[LocNguyen31]

Dear Team,

I'm working with FRDM-MCXN236, I tried to demo RTC with irtc example code but got issue while i config to use external 32.768Khz OSC, 

The issue as picture, please help to advise solve solutions.

thanks, 

[LocNguyen31]

Hi Alice Yang,

no Capacitor for this circuit, but i have measure the signal for this Crystal, the signal wave form is good, so Can we can ignore the hardware issue?

thanks.

[Alice_Yang]

Hello @LocNguyen31 

Please debug step by step to check which code causes the crash. 

If a crash occurs during download, please create a new MCUXPresso IDE workspace and a new project. Pay attention to choosing the right chip. Then, configure the CLOCK, build the project, and start debugging.

BR

Alice

[LocNguyen31]

Hi Alice,

Still bug at line 363 in file clock_config.c, i'm trrying to study this register,  I still don't understand why there is a bug at this command line

RTC0->CTRL |= RTC_CTRL_CLK_SEL_MASK;

[kingchen2019]

note： below update.
/* Enable fro16k[0] to domain Vbat and Main */
// CLOCK_SetupClk16KClocking(kCLOCK_Clk16KToVbat | kCLOCK_Clk16KToMain);
CLOCK_SetupOsc32KClocking(kCLOCK_Osc32kToVbat | kCLOCK_Osc32kToMain);

[Alice_Yang]

Hello @LocNguyen31 

Please connect  capacitors to EXTAL32K. The external passive crystal oscillator must be connected to  capacitor.

BR

Alice

[Alice_Yang]

Hello @LocNguyen31 

Please double - check whether there are capacitors connected to EXTAL32K.

BR

Alice