USB HID is slower than often using PIC18f2550

[Ahmadabuomar]

thx darrel,

I already have 100nf ceramic capacitor between vdd and vss so close to PIC.

LVP disabled, IESO disabled

i have 100nf close to used connector.

the crystal is the same. i dont know if it is parallel or series cut. but i know it is connected parallel with two filtering capacitors 22p at each leg. it is connected as in datasheet.

any idea whats going on?

i ll try to use 10uf close to usb ( even i think its a huge capacitance as much as USB port is concerned) and i ll see if it will solve the problem

see u tomorrow, thx darrel

[mackrackit]

Do you have a capacitor between VUSB and VSS? What value?

Can you post the schematic and/or the board layout?

[Ahmadabuomar]

yes, i have mentioned that in the first post.

i have a 220nf capacitor on Vusb. i changed that to 470nf, still nothing changed

here is simple schematic for basic connections