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Output port voltage vevel in STM32F4

Question asked by uvarov.alexander on May 17, 2013
Latest reply on May 20, 2013 by uvarov.alexander
Could anybody explain how to know the actual output voltage level for STM32F4?
According to the datasheet, all I/Os are TTL and CMOS compliant, but there is no information about how actual value is derived. E.g., for VDD 3.3V output level could be 2.4V (CMOS) or 2.9V (TTL).
I suppose it is dummy question, but I need to be sure.
Does anybody know something on this subject?