Data transfer system, computer system and active-line inserted/w

Details Data transfer system, computer system and active-line inserted/w Data transfer system, computer system and active-line inserted/w

1995-11-27

1998-07-28

Harvey, Jack B.

395280, 395282, G06F 1300

Patent

active

057872619

ABSTRACT:
It is an object of the present invention to provide an active-line inserted/withdrawn functional circuit board, a data transfer system and a computer system which systems allow the functional circuit board to be inserted and withdrawn with signal lines remaining in an active state while achieving a high speed data-transfer of a bus, and the reliability to be enhanced by eliminating malfunctions which occur particularly during the insertion of a functional circuit board.
The data transfer system or the computer system comprising: a functional circuit board having a functional circuit, a pre-charge resistor and a switching element connected in parallel to an input/output signal path of the functional circuit and a switching control means for controlling the conduction of the switching element through synchronization with a delayed clock signal resulting from delaying a bus clock signal for use in data transfers through the bus by a time shorter than a bus-clock cycle time of the bus clock signal; and a connector provided on an input/output end of the parallel connection of the pre-charge resistor and the switching element, whereby the functional circuit board can be inserted and withdrawn to and from the bus.

REFERENCES:
patent: 5530302 (1996-06-01), Hamre et al.
patent: 5604873 (1997-02-01), Fite et al.

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