thingy53 bootloader (firmware upload)

[szhaulai]

Hi 

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 upload and phone DFU on thingy53 according to https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_thingy53_gs.html

Does the chip on thingy53 bare new chip, or is it factory pre-programmed?

Is it possible to buy the pre-programmed chip?

[Vidar Berg]

Hi,

The ICs does not come pre-programmed from the factory, unfortunately. 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).

Best regards,

Vidar