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DSC 56F84xxxx ( EX family ) : Pull up enable in Peripheral Mode

Question asked by Luca Gotti on Aug 30, 2013
Latest reply on Sep 5, 2013 by xiangjun.rong


This discussion just to share what i've experienced on the 56F84xxx family : it could be a bug in the silicon or an error in the reference manual .

On the reference manual of this family ( i.e. : MC56F8455x - Reference Manual see  ) there is the following sentence ( page 983 ) :

 

"• Individual pull resistor type selection for each pin in either peripheral mode or GPIO mode"

 

However, I've experienced that, when a pin is in peripheral mode ( correspondig GPIOx_PER is set ) ,   setting the corresponding bit of GPIOx_PUR doesn't pull the pin up ..

The pull-up seems to be effective only in GPIO mode .

 

 

Has anyone here that have experienced such erratic behaviour ?

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