about usb what do bit stuffing do in usb 2.0 design

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kil

Joined: 15 Feb 2006
Posts: 83
Helped: 1
Location: banglore

05 Mar 2006 7:43 about usb what do bit stuffing do in usb 2.0 design

hi

i strarted a mini project on UTMI block in USB 2.0 .so iam going through intel pds . my dout is what actually this BIT STUFFING helps in error detection and why NZRI ENCODING and DECODING is done .

plz help me how to approch this mini project

i am going through intel's UTMI pdf's . but i am not getting an overall idea about why bit stuffing and other things are actually doing

Crying or Very sad

krushi

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Thomson

Joined: 15 Oct 2004
Posts: 181
Helped: 3

08 Mar 2006 9:06 Re: about usb what do bit stuffing do in usb 2.0 design

Please see the USB2.0 Spec, it will help you!

Thomson

love2read

Joined: 01 Mar 2006
Posts: 43

08 Mar 2006 10:50 about usb what do bit stuffing do in usb 2.0 design

It is the wire delay.

AlexWan

Joined: 26 Dec 2003
Posts: 305
Helped: 6

08 Mar 2006 11:11 about usb what do bit stuffing do in usb 2.0 design

Because the signals of USB aren't according to the pointed clock. There are "phase shift".

If you don't insert the stuff bit, how do you know that you have got the right bit after continuous "1"?