https://community.nxp.com/t5/S32K/GPIO-noise-issue/m-p/1512308#M17334 <P>Hello&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/200923">@Bhuvana</a>&nbsp;</P> <P>That depends on your signal conditions and the source of the noise.</P> <P>The passive filter is just an internal resistor but it's not always available.&nbsp;Refer to the device data sheet for filter characteristics. You will found a table that indicates if the Passive filter is enabled.</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="JRoberto_0-1661511016409.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/191422i1B8DA5E18318D718/image-size/medium?v=v2&amp;px=400" role="button" title="JRoberto_0-1661511016409.png" alt="JRoberto_0-1661511016409.png" /></span></P> <P>The Digital filter will introduce delay in your signal. So in case the noise you mention is generated by a push button (That creates a bounce in the signal). Then digital filtering might be able to help you.</P> <P>You can refer to the thread linked bellow to see some configuration details.</P> <P><A href="https://community.nxp.com/t5/S32-SDK/using-digital-filter-on-external-interrupt-pin-it-overcomes-on/m-p/1508314#M2654" target="_blank">Solved: Re: using digital filter on external interrupt pin... - NXP Community</A></P> <P>Best regards</P> Fri, 26 Aug 2022 10:52:36 GMT JRoberto 2022-08-26T10:52:36Z https://community.nxp.com/t5/S32K/GPIO-noise-issue/m-p/1511739#M17314 <P>MCU:FS32K144UAT0VLLT<BR />100LQFP</P><P>How to remove noise in the GPIO input pins and how to use digital filter and passive filter what it will do exactly? I have enabled digital filter and system clock is FIRC.</P> Thu, 25 Aug 2022 12:08:30 GMT https://community.nxp.com/t5/S32K/GPIO-noise-issue/m-p/1511739#M17314 Bhuvana 2022-08-25T12:08:30Z https://community.nxp.com/t5/S32K/GPIO-noise-issue/m-p/1512308#M17334 <P>Hello&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/200923">@Bhuvana</a>&nbsp;</P> <P>That depends on your signal conditions and the source of the noise.</P> <P>The passive filter is just an internal resistor but it's not always available.&nbsp;Refer to the device data sheet for filter characteristics. You will found a table that indicates if the Passive filter is enabled.</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="JRoberto_0-1661511016409.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/191422i1B8DA5E18318D718/image-size/medium?v=v2&amp;px=400" role="button" title="JRoberto_0-1661511016409.png" alt="JRoberto_0-1661511016409.png" /></span></P> <P>The Digital filter will introduce delay in your signal. So in case the noise you mention is generated by a push button (That creates a bounce in the signal). Then digital filtering might be able to help you.</P> <P>You can refer to the thread linked bellow to see some configuration details.</P> <P><A href="https://community.nxp.com/t5/S32-SDK/using-digital-filter-on-external-interrupt-pin-it-overcomes-on/m-p/1508314#M2654" target="_blank">Solved: Re: using digital filter on external interrupt pin... - NXP Community</A></P> <P>Best regards</P> Fri, 26 Aug 2022 10:52:36 GMT https://community.nxp.com/t5/S32K/GPIO-noise-issue/m-p/1512308#M17334 JRoberto 2022-08-26T10:52:36Z