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STM32F4 Discovery USB OTG Power Switch

Question asked by roofie01 on Jan 26, 2015
Latest reply on Jan 26, 2015 by roofie01
On the Discovery user Guide:
DM00039084_STM32F4_Discovery_User_Guide
On Page 39, there is a power switch: STMPS2141STR that has +5V connected to the input side. The data sheet for this does not indicate and voltage drop through - as there should not be if it is  low on resistance switch. However, the output connects to teh USB port, and also finds it's way to pin PA9 (of the STM32F4.

Is it OK to drive 5V to the STM32F4 PA9 pin if it's supply is a regulated 3.3V?
(my first time working with USB, sorry for this question if it's something obvious)

Thank you...









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