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STM32 deep sleep pin voltage

Question asked by hardy.rob on Jun 11, 2016
 I am  using STM32L100

This is put into deep sleep 

so pins are set to input

I am using FET to control power to external devices.  this is connected to PB9  pulled down by 100k resistor.
 I find that the pin has a voltage of 1V.  Does this mean the high impedence is only in order of 250k.  

I can change pulldown but what to keep as high as possible

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