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LPC55S69 : Power-down mode & GPIO lines

Question asked by Eugene Hiihtaja on Jan 23, 2020
Latest reply on Feb 18, 2020 by Sabina Bruce

Hi !

 

Almost all peripherals ( except wakeup sources ) need to be reinitialized after wakeup from power-down mode.

 

But what about native GPIO lines ? I have several lines what configured as output and also used PU/PD resistors.

 

It seems to be they completely loze configuration and direction need to be configured again and etc.

 

For example LEDs on EVK boards are not possible to put ON e.g very weak low signal.

 

Does it specified somewhere to what configuration, GPIO lines dropped during power down state ?

 

Can those lines keep at list PU/PD register for keep state with smaller sink current as usually.

 

Regards,

Eugene

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