topic SPI Communication in S32K https://community.nxp.com/t5/S32K/SPI-Communication/m-p/789070#M2579 <HTML><HEAD></HEAD><BODY><P>I'm interfacing a <STRONG>thermocuple-to-digital converter</STRONG> <STRONG>operating at 3.3V</STRONG> to a <STRONG>MCU-S32K148 operating at 5V.</STRONG></P><P>This converter is communicating via SPI. My&nbsp; concern is whether communication at 3.3V level will be successfully accomplished or I need to add signal conditioning network in between?</P></BODY></HTML> Mon, 24 Sep 2018 07:03:31 GMT saurabh_sharma 2018-09-24T07:03:31Z SPI Communication https://community.nxp.com/t5/S32K/SPI-Communication/m-p/789070#M2579 <HTML><HEAD></HEAD><BODY><P>I'm interfacing a <STRONG>thermocuple-to-digital converter</STRONG> <STRONG>operating at 3.3V</STRONG> to a <STRONG>MCU-S32K148 operating at 5V.</STRONG></P><P>This converter is communicating via SPI. My&nbsp; concern is whether communication at 3.3V level will be successfully accomplished or I need to add signal conditioning network in between?</P></BODY></HTML> Mon, 24 Sep 2018 07:03:31 GMT https://community.nxp.com/t5/S32K/SPI-Communication/m-p/789070#M2579 saurabh_sharma 2018-09-24T07:03:31Z Re: SPI Communication https://community.nxp.com/t5/S32K/SPI-Communication/m-p/789071#M2580 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>S32K148 dev-kit works on 3.3V and on 5V.&nbsp;<span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/69615i48E47EDF0CAA9438/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P>If you must keep S32k148 power supply to 5V and external device to 3.3V I recommend you to use level&nbsp;shifters because threshold for HIGH is 3.25V if you power the S32K148 to 5V.</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_2.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/69697i5A51BE3C59FA2FA8/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_2.png" alt="pastedImage_2.png" /></span></P><P></P><P>Best regards,</P><P>Razvan</P></BODY></HTML> Tue, 25 Sep 2018 07:57:12 GMT https://community.nxp.com/t5/S32K/SPI-Communication/m-p/789071#M2580 razva_tilimpea 2018-09-25T07:57:12Z