S32K312 ICU

WeiCh — Fri, 14 Mar 2025 10:21:47 GMT

S32K312,主频120MHz，EMIOS能采集3Hz的PWM信号吗

Re: S32K312 ICU

_Leo_ — Fri, 14 Mar 2025 21:56:22 GMT

[Google Translation]
S32K312, main frequency 120MHz, can EMIOS collect 3Hz PWM signal?

Hi,

Thank you so much for your interest in our products and for using our community.

For PWM frequency of 3Hz with eMIOS clock frequency of 120MHz (using internal counter bus) you need 40,000,000 ticks:

1s -> 120MHz (120,000,000 ticks)
3Hz = (1/3)s
->120,000,000 *(1/3) = 40,000,000 ticks

But max ticks are 65,534 (16 bits).

On the other hand, ICU modes (SAIC, IPWM or IPM) allows to use Modulus Counter mode as time base, and with it you can use the global prescaler (1-256), master bus prescaler (1-12) and ICU eMIOS prescaler (1-12).

So, regarding your question, you can collect a 3Hz PWM signal with ICU modes, if you use Modulus Counter mode as time base.

Hope it helps you.

Have a nice day!

Re: S32K312 ICU

WeiCh — Sat, 15 Mar 2025 01:02:04 GMT

下面是Mcl的配置：

请问我该如何配置EMIOS的通道，达到我想要的分频值：240*12，谢谢！

Re: S32K312 ICU

WeiCh — Sat, 15 Mar 2025 02:03:48 GMT

谢谢，我已经找到了原因，是我PWM输出源的问题

S32KのトピックRe: S32K312 ICU

S32K312 ICU

Re: S32K312 ICU

Re: S32K312 ICU

Re: S32K312 ICU