https://devzone.nordicsemi.com/f/nordic-q-a/93727/thingy53-bootloader-firmware-uploadHi I have question about design custom board. I am using thingy53 as my reference design. For the bare new chip I have on my custom board. Do I have to use jtag to program it for the first time to configure the bootloader? I can do usb uploaden-USTelligent Community 13Thu, 10 Nov 2022 10:08:45 GMThttps://devzone.nordicsemi.com/thread/395072?ContentTypeID=1Thu, 10 Nov 2022 10:08:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:18fbe9be-4cd6-48e9-9e81-9f2125b5fe21Vidar Berg<p>Hi,</p> <p>The ICs does not come pre-programmed from the factory, unfortunately.&nbsp;There are however third-party companies that offer pre-programming as a service. This means that the initial programming has to be done through the debug interface (Note that it is SWD and not JTAG).</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>