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Hot!Unused Vbus pulled to ground or wired directly to ground if not using USB?

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MPaulHolmes
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2019/11/12 18:53:39 (permalink)
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Unused Vbus pulled to ground or wired directly to ground if not using USB?

For the PIC32MK1024MCF100, can I get away with hard wiring the Vbus and Vbus2 pins to ground if I am not going to use the USB?  Or do they have to have a resistor pulling them to ground?  
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    LostInSpace
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    Re: Unused Vbus pulled to ground or wired directly to ground if not using USB? 2019/11/12 22:42:46 (permalink)
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    In the data sheets "Absolute Maximum Ratings" table, VBUS has a voltage input range of: -0.3 to +5.5V, so a hard short to ground does not violate this.
     
    Just as an aside - when I am faced with "interesting interpretations" of part usage (of which this is not, this is cut and dried) I usually opt to put a resistor in, just make it zero ohms. That way if I am wrong I can just pop the resistor and easily wire up a jumper as required. Much easier than lifting pins or cutting traces. After the first proto, the resistor can be removed.
     
    Hope This Helps...
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    MPaulHolmes
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    Re: Unused Vbus pulled to ground or wired directly to ground if not using USB? 2019/11/13 06:30:41 (permalink)
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    Thank you!  I missed that.  I really appreciate you taking the time to help me with this.  I have a very packed board, and I was not looking forward to moving a bunch of stuff around to add 2 new resistors.
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