Wired logic functions on FPGA's

Details Wired logic functions on FPGA's Wired logic functions on FPGA's

1993-10-22

1996-01-30

Westin, Edward P.

Electronic digital logic circuitry

Multifunctional or programmable

Array

326114, 326 83, H03K 19088, H03K 19094

Patent

active

054883172

ABSTRACT:
An FPGA having a plurality of logic modules with configurable output drivers (8) to enable outputs (y) of several logic modules to be wired together. The output driver (8) comprises a n-channel and a p-channel driver transistor (16, 20) which are connected to a signal (I/O) when no wired outputs (y) are desired. If two or more outputs (y) are to be connected to enable a wired logic function, p-channel transistor (16) is disabled. Then, a weak pull-up transistor (18) may be provided. Alternatively, a senseamp may be provided to the connected outputs (y).

REFERENCES:
patent: 4481432 (1984-11-01), Davies, Jr.
patent: 5153455 (1992-10-01), Walters, Jr.
patent: 5311080 (1994-05-01), Britton et al.
patent: 5313119 (1994-05-01), Cooke et al.
patent: 5338982 (1994-08-01), Kawana

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