18F4550 VUSB pin problem

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ranaya

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Hello Every1.......

I was prototyping an HID device based on 18f4550. Check all connections and connect it to PC.
No message (even device cannot be recognized) popped up. Device is powered by usb bus line. Finally i check VUSB pin voltage. Voltage seems to be zero . I think it shud vary around 3 or 3.3 V. What cud be the problem here ??

This is my cct... I used mikroC HID example

**broken link removed**

Thanx and waiting for ur quick replies
 

Ok what's wrong with my VUSB pin ?? No voltage with respect to the ground !!! Can sm1 give me a clue abt it
 

I have faced the same problem. I connected a 1k resistor between vusb and D+. That solved the problem for me.
 

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