Initialization of a bidirectional, self-timed parallel interface with automatic testing of AC differential wire pairs
US6984991B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2004 |
| Grant date | Jan 10, 2006 |
| Priority date | — |
| Expiry date | May 11, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Initialization of a bidirectional, self-timed parallel interface with capacitive coupling is provided. The self-timed interface includes master and slave nodes connected by a parallel bus comprising multiple AC differential wire pairs. The initialization includes automatically testing at least one wire pair of the multiple AC differential wire pairs for conductivity failure, wherein the testing is responsive to a link reset signal of a first frequency. The automatically testing includes employing a link test signal of a second frequency to test the at least one wire pair of the multiple AC differential wire pairs. The second frequency is a lower frequency than a third, operational signal frequency of the self-timed parallel interface, and the first frequency and the second frequency comprise different frequencies. An initialization testing and handshake approach between the master node and slave node is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.