Using 32 Khz clock from HIB module as input source for GPTM peripheral

Margherita Pappolla

Prodigy 20 points

Other Parts Discussed in Thread: TM4C129XNCZAD

In my designed board I have an external 32.768 Khz crystal connected to the HIB module of the microcontroller.

Is there a way to connect the RTCOSC outing from the HIB module as clock source for one GPTM to implement the RTC?

Besides is there an application note on how to implement the RTC using the GPTM peripheral?

over 2 years ago

0 Ralph Jacobi over 2 years ago

TI__Guru*** 135355 points

Hello Margherita,

Which TI microcontroller are you using?

Best Regards,

Ralph Jacobi

0 Margherita Pappolla over 2 years ago in reply to Ralph Jacobi

Prodigy 20 points

Hello,

the microcontroller I am using is TM4C129XNCZAD (Arm Cortex-M4)

+1 Ralph Jacobi over 2 years ago in reply to Margherita Pappolla

TI__Guru*** 135355 points

Hello Margherita,

There is a dedicated RTC module on that device which is part of the hibernation module, you should use that for the RTC implementation rather than GPTM.

Best Regards,

Ralph Jacobi

0 Margherita Pappolla over 2 years ago in reply to Ralph Jacobi

Prodigy 20 points

Hi,

thanks for your answer. I am trying to configure the RTC on the HIB module which is indeed the correct way.

Margherita

Arm-based microcontrollers

Arm-based microcontrollers forum

Using 32 Khz clock from HIB module as input source for GPTM peripheral