Search technique for identifying slave devices connected to a serial bus
US5128664A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1986 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Mar 5, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/40169
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A slave device detecting system utilizes the past history of devices connected to a data bus to optimize the time required to re-establish communications. Whenever a master controller senses a condition that requires an assessment of devices on the bus, it examines the addresses of previously connected devices at more frequent time intervals than it does for addresses that were not previously associated with connected devices. In a preferred approach, all valid addresses can be examined in a sequential fashion, and the address of the previously connected device can be examined at every fifth or tenth position in the sequence. With such a technique, a device will be detected much faster once it has returned to the bus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.