why usb vbus pin voltage is 2.8v without load?

Discussion around product based on ARM Cortex M4 core.
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leo.ni
Posts: 52
Joined: Mon Jun 06, 2016 4:20 am

why usb vbus pin voltage is 2.8v without load?

Thu Dec 01, 2016 10:46 am

Hi,all. i use sama5d3-xplained board. i have a problem, why the usb device detect pin (PE9) vbus voltage is 2.8v? it is configured as pullup,what is the value of the pull-up resistor ?Thanks!

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