https://community.nxp.com/t5/Kinetis-Microcontrollers/PTA2-PTA3-as-GPIO-Output-on-KEA128/m-p/2177632#M67925 <P>Hi&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/202124">@zhangzhongjun</a>&nbsp;</P> <P>Thanks for your post.</P> <P>I'm understanding that you have problems when you try to toggle one pin at Port A. Am I understating correctly?&nbsp; Could you share more details about your issue please?</P> Mon, 29 Sep 2025 17:32:49 GMT carlos_o 2025-09-29T17:32:49Z https://community.nxp.com/t5/Kinetis-Microcontrollers/PTA2-PTA3-as-GPIO-Output-on-KEA128/m-p/2175406#M67911 <P>The chip is powered by 3.3V, so the pins are connected to a 3.3V 4.7K resistor for pull-up output. You can observe the changes in the value of the GPIOA_PDOR register. However, using a multimeter, we cannot measure the changes in the high and low levels of <STRONG>PTA3</STRONG>. Have I overlooked any configuration?</P><P><LI-PRODUCT title="FRDM-KEAZ128" id="FRDM-KEAZ128"></LI-PRODUCT>&nbsp;</P><P><SPAN>Thanks,</SPAN></P><P> </P><P> </P> Thu, 25 Sep 2025 03:19:26 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/PTA2-PTA3-as-GPIO-Output-on-KEA128/m-p/2175406#M67911 zhangzhongjun 2025-09-25T03:19:26Z https://community.nxp.com/t5/Kinetis-Microcontrollers/PTA2-PTA3-as-GPIO-Output-on-KEA128/m-p/2177632#M67925 <P>Hi&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/202124">@zhangzhongjun</a>&nbsp;</P> <P>Thanks for your post.</P> <P>I'm understanding that you have problems when you try to toggle one pin at Port A. Am I understating correctly?&nbsp; Could you share more details about your issue please?</P> Mon, 29 Sep 2025 17:32:49 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/PTA2-PTA3-as-GPIO-Output-on-KEA128/m-p/2177632#M67925 carlos_o 2025-09-29T17:32:49Z