Data strobe encoding: Difference between revisions

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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 [[Truth value|logical value]] in one [[clock cycle]], but never both. More precisely data is transmitted as-is and strobe changes its state if and only if data stays constant between two data bits.

This allows for easy [[clock recovery]] with a good [[jitter]] tolerance by [[XOR]]ing the two signal line values.<ref>{{cite book |last=Parkes |first=Steve |date=2012 |title=SpaceWire User's Guide |url=https://www.star-dundee.com/siteswp-content/star_uploads/default2019/files05/SpaceWire%20User's%20Guide-Users-Guide.pdf |___location= |publisher=STAR-Dundee Limited |page=52 |isbn=978-0-9573408-0-0 |author-link= }}</ref>

There is an equivalent way to specify the relationship between Data and Strobe.