Powering NUCLEOWB55RG Externally with 3.3V, How to Program it?

[fshaikh98]

Hi I have a PCB board based off of NUCLEOWB55RG board. I am planning to power it externally (3.3V regulator and Lipo battery) but I also want to program it. How can I disable the onboard regulator to program it with USB? Or can I program it using the J-Link board instead? 

I ran a test by removing the JP1 jumper, the 3.3V output remains 0. However, the ST-LINK doesnt work when I program using CUBEIDE. 

How can I proceed with this?

[TDK]

Powering the board shouldn't add additional complications here. Attach the programmer to the board and it should be able to connect if you have it wired correctly. I recommend using a standard programming header/pinout and an official programmer. The programmer typically doesn't provide power.

GND/SWDIO/SWCLK need connected at a minimum. Recommended VDD/NRST as well.

[fshaikh98]

What type of programmers would you recommend for this board? A segger J-Link or do I have cheaper options? Intention is for this board to be used for commercial purposes, large scale manufacturing later on

[STTwo-32]

Hello @fshaikh98 

The best way is to connect and program using the USB or USART and following the recommendations of AN2606.

Best Regards.

STTwo-32