https://community.nxp.com/t5/S32K/S32K-IO-Voltage-Domain/m-p/1759658#M28762 <P>Dear Team,</P><P>We have two Voltage Domains for IOs in S32 MCU (VDD_HV_A and VDD_HV_B).</P><P>In my design&nbsp;VDD_HV_A and VDD_HV_B both are connected to 3.3V supply nets&nbsp;+3V3_VDD_HV_A and&nbsp;+3V3_VDD_HV_B.&nbsp;</P><P>+3V3_VDD_HV_A and&nbsp;+3V3_VDD_HV_B is generated from two different Bucks of a PMIC. They are two different 3.3V Power Rails.</P><P>My query is "<FONT color="#0000FF">For an IO in&nbsp;VDD_HV_B voltage domain , can we use pullup to&nbsp;+3V3_VDD_HV_A supply</FONT>".</P><P>Will this create any issues in MCU functionality?</P><P>Regards</P><P>Sreelakshmi A</P><P>&nbsp;</P> Mon, 20 Nov 2023 08:07:35 GMT Sreelakshmi 2023-11-20T08:07:35Z https://community.nxp.com/t5/S32K/S32K-IO-Voltage-Domain/m-p/1759658#M28762 <P>Dear Team,</P><P>We have two Voltage Domains for IOs in S32 MCU (VDD_HV_A and VDD_HV_B).</P><P>In my design&nbsp;VDD_HV_A and VDD_HV_B both are connected to 3.3V supply nets&nbsp;+3V3_VDD_HV_A and&nbsp;+3V3_VDD_HV_B.&nbsp;</P><P>+3V3_VDD_HV_A and&nbsp;+3V3_VDD_HV_B is generated from two different Bucks of a PMIC. They are two different 3.3V Power Rails.</P><P>My query is "<FONT color="#0000FF">For an IO in&nbsp;VDD_HV_B voltage domain , can we use pullup to&nbsp;+3V3_VDD_HV_A supply</FONT>".</P><P>Will this create any issues in MCU functionality?</P><P>Regards</P><P>Sreelakshmi A</P><P>&nbsp;</P> Mon, 20 Nov 2023 08:07:35 GMT https://community.nxp.com/t5/S32K/S32K-IO-Voltage-Domain/m-p/1759658#M28762 Sreelakshmi 2023-11-20T08:07:35Z