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PCA10040: Possible to program 1.8V boards?

Hello, I want to use the PCA10040 to program a custom board running on 1.8V using the debug out port. Is this possible?

Also, is there a way to set up the PCA10040 so that it always flashes the connected board? Let's say the connection is broken for whatever reason, then it's possible that it actually flashes the nRF52 on the PCA10040, and not the one on the external board.

Thanks, Jacob

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