Method for providing multiple function symbols

Details Method for providing multiple function symbols Method for providing multiple function symbols

1994-05-09

1997-08-26

Teska, Kevin J.

Boots, shoes, and leggings

364488, 364490, 364578, G06F 1750

Patent

active

056616600

ABSTRACT:
Logic is represented in a schematic capture program as a generic symbol. The generic symbol represents a single underlying logic circuit, thereby decreasing library space. The generic symbol includes a configuration memory which is represented on the symbol by a plurality of pins. The generic symbol is configured by indicating the logic signals placed on the plurality of pins. In this manner, the generic symbol significantly increases the design choices available to the end user. Moreover, the generic symbol allows access to the underlying logic of the circuit via the selected bit pattern, thereby advantageously permitting the end user to perform functional simulation within the schematic environment. In one embodiment, a plug symbol is provided to schematically connect to the generic symbol. This plug symbol represents a predetermined pattern of bits, thereby significantly simplifying configuring the logic in the schematic capture program.

REFERENCES:
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patent: 5339262 (1994-08-01), Rostoker et al.
patent: 5343406 (1994-08-01), Freeman et al.
patent: 5432719 (1995-07-01), Freeman et al.
patent: 5448493 (1995-09-01), Topolewski et al.
patent: 5499192 (1996-03-01), Knapp et al.
"Schematic Design User's Guide", Viewlogic Systems, Inc., Version C, Workview 4.1, Series I, May 1991.
Programmable Logic Data Book, available from Xilinx, Inc., 2100 Logic Drive, San Jose, Ca 95124, 1994, pp. 2-9 through 2-18.

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