Method and system for PLD swapping

The present invention relates generally to interconnecting integrated circuits while power connections are active (hot swapping), and particularly to hot swapping programmable logic devices. An apparatus and method for enabling hot swapping of programmable logic devices (PLDs) and boards containing...

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Bibliographic Details
Main Authors Frake, Scott O, McManus, James L, Schultz, David P, Yee, Wilson K
Format Patent
LanguageEnglish
Published 25.02.2003
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Summary:The present invention relates generally to interconnecting integrated circuits while power connections are active (hot swapping), and particularly to hot swapping programmable logic devices. An apparatus and method for enabling hot swapping of programmable logic devices (PLDs) and boards containing PLDs is provided. If the hot swap capability is desired, a hot swap terminal on the PLD is set to facilitate a floating state on the input/output pad of the PLD. Further, the input buffer and the output buffer of the PLD are disabled. In one embodiment, a predetermined voltage is provided on the output terminal of the input buffer. In this configuration, the hot swap circuit eliminates any leakage current, ensures no static current occurs, and provides appropriate signals to the internal circuits of the PLD.