https://community.nxp.com/t5/MPC5xxx/Quadrature/m-p/1573548#M22528 <P>Hello,</P> <BLOCKQUOTE> <P>there is a problem in reading the CNTR register value at low motor speed?</P> </BLOCKQUOTE> <P>What do you mean by problem reading CNTR?</P> <P>There is no restriction on reading CNTR register:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="petervlna_0-1671692879332.png" style="width: 607px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/205220iD7856A1CBF06D691/image-dimensions/607x323?v=v2" width="607" height="323" role="button" title="petervlna_0-1671692879332.png" alt="petervlna_0-1671692879332.png" /></span></P> <P>Best regards,</P> <P>Peter</P> <P>&nbsp;</P> Thu, 22 Dec 2022 07:08:25 GMT petervlna 2022-12-22T07:08:25Z https://community.nxp.com/t5/MPC5xxx/Quadrature/m-p/1573064#M22524 <P><SPAN>When the eTimer module of MPC5744P decodes ABI orthogonally, there is a problem in reading the CNTR register value at low motor speed?</SPAN></P><P><SPAN>MPC5744P chip SDK3.0.3 How to set the comparison value to zero after CNTR reaches the comparison value?</SPAN></P><P>Why is it longer when the motor Angle reaches 360° to 0°?</P> Wed, 21 Dec 2022 09:34:39 GMT https://community.nxp.com/t5/MPC5xxx/Quadrature/m-p/1573064#M22524 zhang_ke_dong 2022-12-21T09:34:39Z https://community.nxp.com/t5/MPC5xxx/Quadrature/m-p/1573548#M22528 <P>Hello,</P> <BLOCKQUOTE> <P>there is a problem in reading the CNTR register value at low motor speed?</P> </BLOCKQUOTE> <P>What do you mean by problem reading CNTR?</P> <P>There is no restriction on reading CNTR register:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="petervlna_0-1671692879332.png" style="width: 607px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/205220iD7856A1CBF06D691/image-dimensions/607x323?v=v2" width="607" height="323" role="button" title="petervlna_0-1671692879332.png" alt="petervlna_0-1671692879332.png" /></span></P> <P>Best regards,</P> <P>Peter</P> <P>&nbsp;</P> Thu, 22 Dec 2022 07:08:25 GMT https://community.nxp.com/t5/MPC5xxx/Quadrature/m-p/1573548#M22528 petervlna 2022-12-22T07:08:25Z https://community.nxp.com/t5/MPC5xxx/Quadrature/m-p/1575594#M22572 I think your configuration ist correct. You just may have a problem with showing your measurement results. I guess your measurement sampling rate ist slow and does not fit the motor speed (which is ok). So you get undersampling which leads to your described behavior. Thu, 29 Dec 2022 15:45:39 GMT https://community.nxp.com/t5/MPC5xxx/Quadrature/m-p/1575594#M22572 KaiRiek 2022-12-29T15:45:39Z