Data strobe encoding: Difference between revisions

Revision as of 05:13, 14 August 2005

Revision as of 07:42, 26 October 2005

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<tr><td>| [[image:Data_Strobe_Encoding.png]]</td></tr>

<tr><td align=left><small>''Data strobe encoding and recovered clock.''</small></td></tr>

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<tr><td align=left>|<small>''Data strobe encoding and recovered clock.''</small></td></tr>

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'''Data strobe encoding''' (or '''D/S''' encoding) is an encoding scheme for transmitting data in [[digital circuit]]s.

It uses two signal lines (e.g. wires in a cable or traces on a [[printed circuit board]]), ''Data'' and ''Strobe''. These have the property that either Data or Strobe changes its logical value in one [[clock cycle]], but never both.

This allows for easy [[clock recovery]] with a good [[jitter]] tolerance by [[XOR]]ing the two signal line values.

Data strobe encoding is used on the signal lines in the [[FireWire|IEEE 1394]] (aka FireWire 400) system.

[[Gray code]] is another code that always changes one logical value, but never more than one.