https://devzone.nordicsemi.com/f/nordic-q-a/22735/saadc-problemHi,I use demo project in nRF5_SDK_12.1.0_0d23e2a\examples\peripheral\saadc\pca10040\blank\arm5_no_packs\saadc_pca10040.uvprojx. I made the following changes: 1.add one saadc input 2.channel 0 is connected to VDD,and channel 1 is connected toen-USTelligent Community 13Thu, 15 Jun 2017 10:58:08 GMThttps://devzone.nordicsemi.com/thread/89380?ContentTypeID=1Thu, 15 Jun 2017 10:58:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6dabdc57-efa5-4402-86a6-41e385275214J&#248;rgen Holmefjord<p>Hi,</p> <p>We are looking into this issue. A few other users have reported seeing this as well. The issue seems to occur when the application is halted, either by a breakpoint, or by disabling interrupts. The next time the SAADC peripheral is started using <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/saadc.html?cp=2_2_0_36_10#topic">TASKS_START</a>, a sample is written to RAM. This will cause the buffer to swap channels.</p> <p>This issue looks similar to <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.Rev1.errata/anomaly_832_86.html?cp=2_2_1_0_1_23">PAN-86</a>, but we are still investigating this. The same workaround seems to solve this issue though; stopping the SAADC using TASKS_STOP, after each EVENTS_END, seems to prevent channel swapping.</p> <p>I will report back when we have more information.</p> <p>Best regards,</p> <p>Jørgen</p><div style="clear:both;"></div>