Hot docking system and methods for detecting and managing hot docking of bus cards
US6062480A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1998 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Jul 20, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4081
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A hot docking system and method for managing and detecting hot docking of bus cards. The hot docking system detects the load impedance at the power pins of the bus connector to determine whether a card has been inserted. When insertion is detected, bus activity on the connector is ceased until the card is completely inserted which is indicated by signals present on card detect pins which are mechanically shorter that the bus signal pins and thereby provide this insertion signal after all other connections are complete. The power supply pins are mechanically longer than the bus signal pins thereby providing an early indication that a card has been inserted. On removal of the card, the card detect pins disconnect before the bus signal pins or the power supply pins, signaling the system to halt bus activity but maintain power on the connector until the card is completely removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.