topic Re: QN9080 RTC CNT2 in Other NXP Products

QN9080 RTC CNT2

Kynnans — Tue, 18 Feb 2025 05:59:27 GMT

In QN9080 sdk documents ,a RTC register named CNT2 will add one at every clock rising edge, but it‘s a 32 bit number. If i use a 32.768kHz crystal, It can only count to 36 hours. What happens when this register overflows after 36h

Re: QN9080 RTC CNT2

KaiLi — Tue, 18 Feb 2025 09:22:06 GMT

Hello @Kynnans

Which SDK documents do you use and let me check it.

Re: QN9080 RTC CNT2

KaiLi — Tue, 18 Feb 2025 09:55:31 GMT

Hello @Kynnans

An interrupt will occur after the overflow, and how the interrupt event is handled is determined by the application layer.

Re: QN9080 RTC CNT2

Kynnans — Wed, 19 Feb 2025 07:35:34 GMT

Can I modify this value？

Re: QN9080 RTC CNT2

KaiLi — Thu, 20 Feb 2025 03:01:42 GMT

Hello @Kynnans

Which value are you referring to? An interruption event?

Re: QN9080 RTC CNT2

Kynnans — Thu, 20 Feb 2025 06:46:45 GMT

can i modify CNT2?

Re: QN9080 RTC CNT2

KaiLi — Fri, 21 Feb 2025 01:38:48 GMT

Hello @Kynnans

CTN2 is free running count value, which cannot be modified.