Programmable logic device having combinational logic at inputs t

Details Programmable logic device having combinational logic at inputs t Programmable logic device having combinational logic at inputs t

1998-05-21

2000-05-23

Tokar, Michael

Electronic digital logic circuitry

Multifunctional or programmable

Array

326211, 326 38, G06F 738

Patent

active

060669608

ABSTRACT:
AND gates are used at the inputs to logic elements in a programmable logic device. This allows more efficient configuration of the logic elements for basic functions such as a multiplier, clearable counter and multiplexer. Inputs to the AND gates are enabled by LAB-wide control signals that are distributed to several logic elements within a logic array block. The control signals can also be generated from a RAM or ROM, or by decoding existing control signals.

REFERENCES:
patent: 3473160 (1969-10-01), Wahlstrom
patent: 5500608 (1996-03-01), Goetting et al.
XILNX Databook, 1994, pp. 8-62 to 8-121, pp. 8-152 to 8-158.

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