Device presence detection using a single channel of a bus
US8990465B2 · kind B2 · utility
5Cited by
2References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2012 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Sep 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2213/0052
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The presence of devices attached to a bus are detected by a controller of a bus transmitting a signal on a channel of the bus, to cause each device to hold the channel to a first logical state for a duration of time that is unique to each device. The device that holds the channel to the first logical state for the longest duration of time is detected. Detected devices remain idle while undetected devices repeat holding the channel to the first logical state for the duration of time, until detected. All devices are detected when the channel returns to a second logical state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.