USB 18F2550 Problem

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  1. - 5th August 2010, 21:26 #2
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    rsocor01
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    Quote Originally Posted by mackrackit View Post
    I have a 1.0uF cap on VUSB and I am running the chip at 3.3 volts as I do with a 4550.
    Hi,

    I don't think you need a cap on VUSB when Vcc=3.3V. I connected VUSB to 3.3V directly when using Vcc=3.3V, and it works great. Do you have the internal regulator disabled?

    Robert
    Name: USB-Reg.GIF Views: 1001 Size: 24.2 KB
    Last edited by rsocor01; - 5th August 2010 at 21:29.
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