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GPIO Drive on NRF51822

Hi Nordic

I don't fully understand the drive settings for the GPIO. For example S0H1 means when the pin is CLEARED, it will use standard drive (can sink 0.5mA) and when it is SET, it will use high drive ( can supply 5mA). Is this correct so far? What is the implication of setting the drive to disconnect? Does S0D1, fo example, mean standard drive '0' and that you cannot set the pin to '1'?

Thanks in advance

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