Method and apparatus for logical detach for a hot-plug-in...

Details Method and apparatus for logical detach for a hot-plug-in... Method and apparatus for logical detach for a hot-plug-in...

2005-03-22

2005-03-22

Rinehart, Mark H. (Department: 2112)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus interface architecture

C710S063000, C326S030000, C714S043000

Reexamination Certificate

active

06871252

ABSTRACT:
A method and apparatus for performing logical attachments and detachments in a hot-plug-in data bus is described. A hot-plug-in data bus may utilize pull-down resistors to keep bus signals near a low voltage level when bus units are physically detached. Active pull-up resistors may then raise the bus signals away from ground when the bus units are physically attached via cabling or other forms of interconnection. The pull-up resistors may be switched away from the pull-up voltage source, which allows the remaining pull-down resistors to pull the bus signals down to the voltage levels corresponding to physical detachment of the cabling.

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