Message broadcast in a 1-wire system
US9239809B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2013 |
| Grant date | Jan 19, 2016 |
| Priority date | — |
| Expiry date | Jul 10, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4068
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A message is simultaneously broadcast to multiple systems on a 1-wire bus. A first addressed communication session is established between a microprocessor and a first 1-wire I/O expander via a 1-wire bus, where the first 1-wire I/O expander is electrically coupled to a first system. The first 1-wire I/O expander is placed into “fast access mode”, and then removed from the 1-wire bus by opening a switch to the 1-wire bus. A second addressed communication session is established between the microprocessor and a second 1-wire I/O expander before the switch recloses, where the second 1-wire I/O expander is electrically coupled to a second system. The second 1-wire I/O expander is then placed into “fast access mode”. In response to the timer expiring and the switch reclosing, an unaddressed message is broadcast from the microprocessor to the first and second systems via the first and second 1-wire I/O expanders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.