https://devzone.nordicsemi.com/f/nordic-q-a/21003/i2s-external-clockHi, is it possible for the NRF52832 to have an external I2S MCK clock when being in master. Because I am working with a DAC/amplfier which will play some sound files from the NRF, but the NRF&#39;s own I2S clock configurations doesn&#39;t meet the clock requirementsen-USTelligent Community 13Mon, 03 Apr 2017 06:18:35 GMThttps://devzone.nordicsemi.com/thread/82078?ContentTypeID=1Mon, 03 Apr 2017 06:18:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f3faa6ca-ccc9-46ce-a81d-325478f10502H&#229;kon Alseth<p>The I2S is sourced by the PCLK32M, so any MCLK generated will be a division of 32.000M. Here&#39;s the table in the PS: <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/i2s.html?cp=2_2_0_43_9_8#register.CONFIG.MCKFREQ">infocenter.nordicsemi.com/.../i2s.html</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/82077?ContentTypeID=1Fri, 31 Mar 2017 14:43:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a1ad9909-a610-4987-b2bb-7c78023ff025Erblin<p>Ok, that was unfortunate. But how stable are the I2S clocks when MCLK &gt; 4Mhz?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/82076?ContentTypeID=1Fri, 31 Mar 2017 12:24:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ff764dac-cfc6-4216-bc9b-f0ba61f0b820H&#229;kon Alseth<p>Hi,</p> <p>Unfortunately, the nRF52832 cannot accept an external clock source for the I2S master mode. You&#39;ll have to setup the nRF52832 in I2S slave mode to do this (provided that your external DAC supports I2S master mode)</p> <p>Best regards, Håkon</p><div style="clear:both;"></div>