Method and apparatus for a hot-swappable input/output device...

Details Method and apparatus for a hot-swappable input/output device... Method and apparatus for a hot-swappable input/output device...

2007-12-03

2010-10-05

Peyton, Tammara (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output access regulation

C710S034000, C710S035000, C361S090000, C361S093900, C326S083000, C326S086000

Reexamination Certificate

active

07809864

ABSTRACT:
A method and apparatus is provided for a configurable input/output (I/O) interface within an integrated circuit to support a plurality of I/O standards. The configurable I/O interface exhibits a default operation that facilitates hot-swappability, which eliminates current paths within the I/O interface that may be created during plug-and-play operation of the I/O interface. The current paths are eliminated within the I/O interface even while the I/O interface is not receiving operational power, or while the I/O interface is in a power-on reset condition. A programmable option of the configurable I/O interface, on the other hand, alleviates over-voltage conditions while the I/O interface is tri-stated by activating shunt circuitry to conduct a clamp current during the over-voltage condition. The over-voltage condition is further alleviated by passively establishing current paths through existing circuitry within the I/O interface for the duration of the over-voltage condition.

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