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X-NUCLEO-SRC1M1 Functionality at 20V

Carl_G
Senior II

I have this SRC1m1 board and would like to run some tests with it at 20V. Your user manual is conspicuously not mentioning running it above 5V. It does have a lot to say about running it at 5V if you do not have UCPD. Sortof implying if you do have UCPD you can run it above 5V. But I don't see how.

Can anyone clue me in on how you can run this board with a 20V source? As far as I know PD requires 5V connection, then negotiation to get 20V. This board has no capability to output more than a single voltage. So there is no way to do the negotiation at 5V then switch to 20V. So running above 5V is not possible.  Correct?

Or am I supposed to monitor the PD data when when I see the ACCEPT message sent out I should quickly (within tPSTransition 550ms) change my PSU to 20V?

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