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USBD- and USBD+ (PA11/PA12) Alternate Function

Question asked by BEN_GAFSOS.gafsos on Aug 9, 2012
Latest reply on Jan 27, 2014 by gregson.peter
Hello,

One simple question please: Why It is mandatory to Set PA11/PA12 for USB data (+/-) as Alternate Function (AF) ? in STM32F103 for example
I’m asking this because in other products such as STM32L , it working even without  putting them as “AF”

Could You please help me
Abdul

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