Method and apparatus for PLD having shared storage elements

Details Method and apparatus for PLD having shared storage elements Method and apparatus for PLD having shared storage elements

2007-06-22

2010-06-08

Chang, Daniel D (Department: 2819)

Electronic digital logic circuitry

Multifunctional or programmable

Array

C326S046000

Reexamination Certificate

active

07733124

ABSTRACT:
A programmable logic device (PLD) includes a core region having a plurality of logical array blocks (LABs). Each one of the plurality of logical array blocks include a plurality of logic elements capable of communicating with each other through interconnections defined within each logical array block. The logic elements include a look up table (LUT), wherein a LUT of a first logic element and a LUT of a second logic element share a register. In one embodiment, more than two logic elements may share a register. Thus, the embodiments provide for the ability to vary sequential logic, e.g., registers, instead of rigidly fixing the sequential logic and consequently the ratio of combinatorial logic to sequential logic.

REFERENCES:
patent: 5349250 (1994-09-01), New
patent: 6288570 (2001-09-01), New

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