Programmable logic module for data path applications

Details Programmable logic module for data path applications Programmable logic module for data path applications

1994-11-16

1997-01-21

Westin, Edward P.

Electronic digital logic circuitry

Multifunctional or programmable

Array

326 46, H03K 19177

Patent

active

055962874

ABSTRACT:
A logic module for embodying a wide combination of logic and sequential logic in response to a user's demand is divided into a combination circuit part and a sequential circuit part. The combination circuit part is divided into a first stage including a first and a second two-input multiplexers and a second stage. The respective input terminals of the first and second multiplexers are connected to output terminals of two-input AND gates and a first and second input terminals of the two-input AND gates are data and inverted data to select the desired data state. The respective first and second multiplexers have select control input terminals which are connected to an output of an exclusive OR gate having two inputs. The second stage of the combination circuit part includes a third two-input multiplexer of which the first input is connected to the output of the first multiplexer, and a second input is connected to the output of the second multiplexer and a data select control input is connected to an output of a four-input logic gate. The four-input logic gate has two data inputs and two inverted data inputs, thereby embodying the AND combination of two data on demand. The sequential circuit part of a logic module consists of a switching part and a sequential part. The one of outputs from the first and second multiplexers of the combination circuit part is directly selected by the switching part.

REFERENCES:
patent: 4717912 (1988-01-01), Harvey et al.
patent: 5046035 (1991-09-01), Jigour et al.
patent: 5122685 (1992-06-01), Chan et al.
patent: 5172014 (1992-12-01), El Ayat et al.
patent: 5357153 (1994-10-01), Chiang et al.

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