Framing codes for high-speed parallel data buses
US6275880A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1999 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Feb 22, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99944
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A plurality of serial data streams are transmitted on a corresponding plurality of lines at a common frequency in equal groups of symbols. A framing signal composed of groups of symbols corresponding in number to groups of data symbols is transmitted on an additional control line. Each group of symbols in the framing signal includes a majority of symbols capable of representing a first plurality of code words and a second plurality, substantially less than the first plurality, of valid code words, and a minority of symbols which constitute parity check symbols. Each of the valid code words consists of a first sub-group of similar symbols and a second plurality of similar symbols. For some of the valid code words the symbols in the first sub-group are similar to the symbols in the second sub-group. For other valid code words the symbols in the first sub-group are different from the symbols in the second sub-group. The valid code words correspond to groups which represent (a) start of a data packet or block; (b) data/(c) a gap between groups of data; and (d) an idle state. The sequence of groups in the framing signal is monitored by means of a state machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.