Automatic recovery of non-responsive peripheral device by apparent disconnect and reconnect
US6647452B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 2000 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Oct 20, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4291
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A change-over switch is disposed on a line of a peripheral device. The change-over switch is controlled by a control unit provided within a USB controller. When a host discontinues a polling operation to the peripheral device, the peripheral device first opens the circuit of the change-over switch so as to decrease the potential at a point of the host to substantially the same potential of a ground line. Then, the peripheral device closes the circuit of the change-over switch to increase the potential at the point to be close to a power supply voltage. Accordingly, the host determines that the peripheral device is reconnected to the host, and starts the polling operation. In this way, the peripheral device is apparently disconnected and reconnected, thereby allowing for recovery without the actual physical disconnection and reconnection of the peripheral device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.