https://devzone.nordicsemi.com/f/nordic-q-a/19143/pca10040-possible-to-program-1-8v-boardsHello, I want to use the PCA10040 to program a custom board running on 1.8V using the debug out port. Is this possible? Also, is there a way to set up the PCA10040 so that it always flashes the connected board? Let&#39;s say the connection is broken foren-USTelligent Community 13Tue, 12 Sep 2017 20:47:15 GMThttps://devzone.nordicsemi.com/thread/74091?ContentTypeID=1Tue, 12 Sep 2017 20:47:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0aabf9b7-064b-4747-9c7a-eb435848ed45phipi<p>I&#39;ve shorted SB17 and then pulled the RESET pin to GND to ensure that the on board NRF isn&#39;t programmed by mistake.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/74089?ContentTypeID=1Mon, 31 Jul 2017 13:18:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a5ac4a26-0178-446a-a5cd-307fdcbcabe3Nguyen Hoan Hoang<p>It should.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/74088?ContentTypeID=1Mon, 31 Jul 2017 12:57:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7067f037-8f7a-477d-8bc5-73d0492dfad2Florian Zierer<p>Ok I understand that your programmer can handle it with an internal level shifter, but I ask if it is possible with the nrf52-DK and <a href="https://www.sparkfun.com/products/12009">this level shifter?</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/74087?ContentTypeID=1Mon, 31 Jul 2017 12:53:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5eb4628d-c8ae-4136-8e11-0c7f7169710bNguyen Hoan Hoang<p>The <a href="http://embeddedsoftdev.blogspot.ca/p/idap-link.html">IDAP-Link</a> has onboard level shifter supporting 1.8V-3.6V on target side.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/74086?ContentTypeID=1Mon, 31 Jul 2017 12:50:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6f9d0690-95bf-40b6-905b-63c2b10186f3Florian Zierer<p>Would it be possible to flash the external board at e.g. 1.8V with the help of a level shifter like <a href="https://www.sparkfun.com/products/12009">this one?</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/74090?ContentTypeID=1Mon, 23 Jan 2017 12:36:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:48451724-3605-451d-9eda-f266a6e0a633Ole Bauck<p>You can remove the power from the chip on the DK by for example cutting SB9, then you will get an error if you try to flash and there is no external board connected. SB9 is used for current measurement as described <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/development/dev_kit_v1.1.0/prepare_board.html?cp=2_2_2_3_1_6_0">here</a>.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/74085?ContentTypeID=1Fri, 20 Jan 2017 18:09:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2333a325-0117-4ffe-b7b2-9e599568dc30Nguyen Hoan Hoang<p>You can flash 1.8 using an external jtag such as the JLink or <a href="http://embeddedsoftdev.blogspot.ca/p/idap-link.html">IDAP-Link</a> but not using the one on the DK.</p><div style="clear:both;"></div>