no I do not use Capacitor
A pair of capacitors are required when utilizing a crystal.
A typical circuit is shown below:
For a 20MHz Crystal, 22pF capacitors are a bit on the high side, typical values usually range in the 15pF to 20pF range. Unless you have have the actual datasheet belonging to the crystal in use I would recommend starting with 15pF values.
You can omit the 1MΩ resistor shown in the schematic.
Be sure and connect both sets of Vdd and Vss pins and use bypass capacitors as shown in the schematic.
A well regulated power supply is a requirement as well, no cutting corners.
I use PIC18F4550 or PIC 16F877A
I import the hex file "help.hex"
I was under the impression we were discussing the PIC18F4550, is this not the case?
Was the HEX file arunsharma0731 uploaded for you intend for a PIC18F4550 to demo a USB implementation?
It seems this thread maybe straying off topic, if so please start a new thread.
BigDog