https://devzone.nordicsemi.com/f/nordic-q-a/65600/qfn40-pin-assignments-on-nrf52820-and-nrf52833-are-the-sameHi, I started debugging a device with an nRF52820 chip and found that the pinout is similar to nRF52833. The test application was switching pin P0.15, but the ripple was on pin 14, which corresponds to pinout 52833. I switched all pins as foren-USTelligent Community 13Mon, 07 Sep 2020 07:47:34 GMThttps://devzone.nordicsemi.com/thread/268203?ContentTypeID=1Mon, 07 Sep 2020 07:47:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9740f103-b617-4f9b-8a29-8ef7512da5caSigurd<p>Hi,</p> <p>You are correct, the pin assignments on nRF52820 Engineering A is different compared to the later versions of the chip.</p> <p><span>You should not be using&nbsp;</span><span>nRF52820&nbsp;</span><span>Engineering A now. The&nbsp;production variant(nRF52820 revision 2) is now available. See <a href="https://infocenter.nordicsemi.com/topic/comp_matrix_nrf52820/COMP/nrf52820/nrf52820_ic_revision_overview.html">this link</a>.</span></p> <p><span>Support for nRF52820 revision 2 was added in nRF5 SDK v17.0, see <a href="https://infocenter.nordicsemi.com/topic/comp_matrix_nrf52820/COMP/nrf52820/nrf52820_ic_rev_sdk_sd_comp_matrix.html">this link</a>.&nbsp;Engineering A is not supported.</span></p><div style="clear:both;"></div>