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

[GottiLuca]

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 ?

[xiangjun_rong]

Regarding the remark ""• Individual pull resistor type selection for each pin in either peripheral mode or GPIO mode" in reference manual of MC56F8455XRM, this is a typo of the reference manual, the GPIO pull-up resistor is only valid when the GPIO is in GPIO and input mode, it is not valid for peripheral mode and GPIO output mode.

I will contact the application team to correct reference manual. I have checked, the same typo appears in MC56F847xxRM(in section 38.1.1 Features).

BR

XiangJun Rong