https://devzone.nordicsemi.com/f/nordic-q-a/73275/nrf52833-spi-power-too-lowHi, When I test the SPI with extern flash W25Q64, The SDK default configuration seems to be too low powe, After SPI initialization is complete, The GPIO drive is configured as &quot;S0S1&quot;, I had to reconfigure the GPIO drive to &quot;H0H1&quot;. The flash device fromen-USTelligent Community 13Fri, 26 Mar 2021 10:43:17 GMThttps://devzone.nordicsemi.com/thread/302109?ContentTypeID=1Fri, 26 Mar 2021 10:43:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4f1a224e-b2f5-4e95-9250-6df28bab00cfawneil<p>You really need to use an oscilloscope to see what&#39;s actually happening on the wires - that will show you if there&#39;s any signal level issues ...</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/302106?ContentTypeID=1Fri, 26 Mar 2021 10:39:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:28f06411-b81a-4b8e-b319-3afd5795c8e7yolee599<p><span class="fontstyle0"><span class="VIiyi" lang="en"><span class="JLqJ4b ChMk0b"><span>I try to read the chip</span></span></span> device ID, <span class="VIiyi" lang="en"><span class="JLqJ4b ChMk0b"><span>Not reconfiguring gpio, the read failed, But after reconfiguring gpio, </span></span></span><span class="VIiyi" lang="en"><span class="JLqJ4b ChMk0b"><span>It is successful.</span></span></span> <br /></span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/302103?ContentTypeID=1Fri, 26 Mar 2021 10:25:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9b235cc7-c17a-425d-8a63-fac5c60cffb7awneil[quote userid="102946" url="~/f/nordic-q-a/73275/nrf52833-spi-power-too-low"]The SDK default configuration seems to be too low powe[/quote] <p>How do you determine that?</p><div style="clear:both;"></div>