https://community.nxp.com/t5/Power-Management/MC33771-SPI/m-p/1530940#M2173 <P>Hi Mohamed,</P> <P>The setting of the PGA gain in manual or automatic mode can be performed by configuring ADC_CFG[PGA_GAIN] register (0x06).</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="ADC_CFG.JPG" style="width: 766px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/195433iD88902FED44432B3/image-size/large?v=v2&amp;px=999" role="button" title="ADC_CFG.JPG" alt="ADC_CFG.JPG" /></span></P> <P>The setting of the PGA gain in automatic mode will also be performed by the automatic&nbsp;gain control. Automatic gain control allows the device to obtain the most appropriate gain&nbsp;setting for the amplifier input signal level. In automatic gain control mode, the conversion&nbsp;result is digitally compared with internally programmed thresholds.</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Figure 14.JPG" style="width: 613px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/195432i4E98E51652B5EC3D/image-size/large?v=v2&amp;px=999" role="button" title="Figure 14.JPG" alt="Figure 14.JPG" /></span></P> <P>You might find useful information about programming/setting the MC33771 in the AN12084 (MC3371/MC33772 Programming Guide<A id="relatedDocsClickPDF_2" class="dtmcustomrulelink" href="https://www.nxp.com/webapp/sd/collateral/1644500335544709159777?version=1.2" target="_blank" rel="noopener" data-dtmaction="Documentation Section - Results Link Click" data-dtmsubaction="AN12084 MC3371/MC33772 Programming Guide - Secure Files - Application Note - English"></A>) which is available on the product website under Secure Files requiring an NDA:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="AN.JPG" style="width: 865px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/195434i4307453DC03762E6/image-size/large?v=v2&amp;px=999" role="button" title="AN.JPG" alt="AN.JPG" /></span></P> <P>In the Software section under Secure Files is also available complete BCC Software Driver:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Driver.JPG" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/195435i38CC2AED00373D56/image-size/large?v=v2&amp;px=999" role="button" title="Driver.JPG" alt="Driver.JPG" /></span></P> <P>Best regards,</P> <P>Tomas</P> Fri, 30 Sep 2022 07:31:53 GMT TomasVaverka 2022-09-30T07:31:53Z https://community.nxp.com/t5/Power-Management/MC33771-SPI/m-p/1530745#M2171 <P>How can i know SPI commands to control PGA or IC at all ?</P> Thu, 29 Sep 2022 22:42:57 GMT https://community.nxp.com/t5/Power-Management/MC33771-SPI/m-p/1530745#M2171 mohamed-moustafa 2022-09-29T22:42:57Z https://community.nxp.com/t5/Power-Management/MC33771-SPI/m-p/1530940#M2173 <P>Hi Mohamed,</P> <P>The setting of the PGA gain in manual or automatic mode can be performed by configuring ADC_CFG[PGA_GAIN] register (0x06).</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="ADC_CFG.JPG" style="width: 766px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/195433iD88902FED44432B3/image-size/large?v=v2&amp;px=999" role="button" title="ADC_CFG.JPG" alt="ADC_CFG.JPG" /></span></P> <P>The setting of the PGA gain in automatic mode will also be performed by the automatic&nbsp;gain control. Automatic gain control allows the device to obtain the most appropriate gain&nbsp;setting for the amplifier input signal level. In automatic gain control mode, the conversion&nbsp;result is digitally compared with internally programmed thresholds.</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Figure 14.JPG" style="width: 613px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/195432i4E98E51652B5EC3D/image-size/large?v=v2&amp;px=999" role="button" title="Figure 14.JPG" alt="Figure 14.JPG" /></span></P> <P>You might find useful information about programming/setting the MC33771 in the AN12084 (MC3371/MC33772 Programming Guide<A id="relatedDocsClickPDF_2" class="dtmcustomrulelink" href="https://www.nxp.com/webapp/sd/collateral/1644500335544709159777?version=1.2" target="_blank" rel="noopener" data-dtmaction="Documentation Section - Results Link Click" data-dtmsubaction="AN12084 MC3371/MC33772 Programming Guide - Secure Files - Application Note - English"></A>) which is available on the product website under Secure Files requiring an NDA:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="AN.JPG" style="width: 865px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/195434i4307453DC03762E6/image-size/large?v=v2&amp;px=999" role="button" title="AN.JPG" alt="AN.JPG" /></span></P> <P>In the Software section under Secure Files is also available complete BCC Software Driver:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Driver.JPG" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/195435i38CC2AED00373D56/image-size/large?v=v2&amp;px=999" role="button" title="Driver.JPG" alt="Driver.JPG" /></span></P> <P>Best regards,</P> <P>Tomas</P> Fri, 30 Sep 2022 07:31:53 GMT https://community.nxp.com/t5/Power-Management/MC33771-SPI/m-p/1530940#M2173 TomasVaverka 2022-09-30T07:31:53Z https://community.nxp.com/t5/Power-Management/MC33771-SPI/m-p/1531069#M2174 <P>I cannot access those files&nbsp;<BR />where I have no response on my NDA request.</P><P>What should I do?</P><P>&nbsp;</P> Fri, 30 Sep 2022 11:30:21 GMT https://community.nxp.com/t5/Power-Management/MC33771-SPI/m-p/1531069#M2174 mohamed-moustafa 2022-09-30T11:30:21Z