System for coupling programmable logic device to external circui

Details System for coupling programmable logic device to external circui System for coupling programmable logic device to external circui

1995-10-16

1999-10-19

Lee, Thomas C.

395828, 395830, 395834, 395882, 395884, G06F 1310

Patent

active

059702559

ABSTRACT:
A programmable input/output device for use with a programmable logic device (PLD) is presented comprising an input buffer, an output buffer and programmable elements. The programmable elements may be programmed to select a logic standard for the input/output device to operate at. For instance, a given set of Select Bits applied to the programmable elements may select TTL logic, in which case the input and output buffers would operate according to the voltage levels appropriate for TTL logic (e.g., 0.4 volts to 2.4 volts). For a different set of Select Bits, the GTL logic standard would be applied (e.g., 0.8 volts to 1.2 volts). The invention enables a single PLD to be used in conjunction with various types of external circuitry.

REFERENCES:
patent: Re34444 (1993-11-01), Kaplinsky
patent: 4032800 (1977-06-01), Droscher et al.
patent: 4609986 (1986-09-01), Hartmann et al.
patent: 4617479 (1986-10-01), Hartmann et al.
patent: 4677318 (1987-06-01), Veenstra
patent: 4713792 (1987-12-01), Hartmann et al.
patent: 4774421 (1988-09-01), Hartmann et al.
patent: 4871930 (1989-10-01), Wong et al.
patent: 4899067 (1990-02-01), So et al.
patent: 4912342 (1990-03-01), Wong et al.
patent: 4972470 (1990-11-01), Farago
patent: 4975602 (1990-12-01), Nhu
patent: 4987578 (1991-01-01), Akins et al.
patent: 4994691 (1991-02-01), Naghshineh
patent: 5003200 (1991-03-01), Sakamoto
patent: 5023488 (1991-06-01), Gunning
patent: 5101122 (1992-03-01), Shinonara
patent: 5121006 (1992-06-01), Pedersen
patent: 5121359 (1992-06-01), Steele
patent: 5220214 (1993-06-01), Pedersen
patent: 5235219 (1993-08-01), Cooperman et al.
patent: 5260610 (1993-11-01), Pedersen et al.
patent: 5260611 (1993-11-01), Cliff et al.
patent: 5350954 (1994-09-01), Patel
patent: 5371422 (1994-12-01), Patel et al.
patent: 5374858 (1994-12-01), Elmer
patent: 5412599 (1995-05-01), Daniele et al.
patent: 5426744 (1995-06-01), Sawase et al.
patent: 5428305 (1995-06-01), Wong et al.
patent: 5483178 (1996-01-01), Costello et al.
patent: 5534798 (1996-07-01), Phillips et al.
patent: 5590305 (1996-12-01), Terrill et al.
patent: 5600267 (1997-02-01), Wong et al.
patent: 5732407 (1998-03-01), Mason et al.
R.C. Minnick, "A Survey of Microcellular Research," Journal of the Association for Computing Machinery, vol. 14, No. 2, pp. 203-241, Apr. 1967.
S.E. Wahlstrom, "Programmable Logic Arrays--Cheaper by the Millions," Electronics, Dec. 11, 1967, pp. 90-95.
Recent Developments in Switching Theory, A. Mukhopadhyay, ed., Academic Press, New York, 1971, chapters VI and IX, pp. 229-254 and 369-422.

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