Method and apparatus for bus isolation
US6128682A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1998 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Jun 25, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4022
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A circuit for isolating a device from a bus includes a switch and control logic. The switch has a control input and is coupled between the bus and the device. The bus includes a first plurality of bus lines, including a first grant line. The device includes a second plurality of bus lines, including a second grant line. The control logic is coupled to the control input of the switch and adapted to detect a bus isolation event, and generate a bus isolation signal in response to the bus isolation event. The control logic provides the bus isolation signal to the control input of the switch, and drives the voltage on the second grant line to a predetermined voltage in response to the bus isolation signal. The predetermined voltage is independent of the voltage on the first grant line. A method for isolating a device from a bus includes detecting a bus isolation event. An isolation signal is generated in response to the bus isolation event. The device is isolated from the bus in response to the isolation signal. A grant line on the device is driven to a predetermined voltage in response to the isolation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.