Hello,
I am writing to ask a question regarding the power supply configuration when using an external board with the nRF5340DK.
I am referring to page 30 of the nRF5340DK User Guide, and there is a section that seems slightly ambiguous to me.
The document recommends using separate power supplies for the external board and the DK. (Blue)
However, the caution note below states to "use VDD..." to prevent damage to the DK. (Yellow)
Does the caution note in the yellow section apply only when I am powering the external board using the DK's VDD?
Or, is the recommendation to "keep the supply below 100 mA" applicable even when the external board and the DK have isolated power supplies?
(i.e., when not using the DK's VDD but connect external boards VDD to DK's VTG pin for activation SWD1)
(My external board includes an nRF7002, which can have peak current consumption exceeding 200 mA. I am concerned that the external board's VDD might damage the DK through the VTG pin.)
If the current must be kept below 100 mA even when the power supplies are separated, I may need to consider options other than the nRF5340DK for debugging.
Thank you.
