https://devzone.nordicsemi.com/f/nordic-q-a/30033/loading-the-firmware-of-the-51822-chip-with-another-similar-chipHello. Is it possible to flash 51822 on SDO and SCLK lines using another same chip? Are there any manuals for the SDO / SCLK interface for 51822? Maybe there is already a similar practice - would be very grateful for the links. Thank you in advanceen-USTelligent Community 13Fri, 02 Feb 2018 13:51:43 GMThttps://devzone.nordicsemi.com/thread/119546?ContentTypeID=1Fri, 02 Feb 2018 13:51:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7ca00556-31d8-4b80-be8d-9597d613831dMartinBL<p>Hi,</p> <p>It is certainly possible, but can be complicated. I suggest that you look at this:&nbsp;<a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.whitepapers/dita/whitepapers/nwp_027/intro.html?cp=11_3">Production Programming</a>.</p> <p>There are other ways to program the nRF5 series using a sepparate MCU though. Instead of implementing the SWD protocol it might be easier to use <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v14.2.0/ble_sdk_app_dfu_bootloader.html?cp=4_0_0_4_2_3">Device Firmware Upgrade (DFU)</a> over a <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v14.2.0/lib_dfu_transport_serial.html">serial transport</a> interface.&nbsp;&nbsp;</p><div style="clear:both;"></div>