Back to results
US 5,473,267 AGranted
Programmable logic device with memory that can store routing data of logic data
AssigneeSGS-Thomson Microelectronics S.A.
InventorAnthony I. Stansfield
Life of this patent
Estimating the term…
Abstract
A programmable logic device is disclosed which can be used either as a look-up table logic device or as a logic function generator. This enables combinations to be provided such as the combination of a look-up table with a fixed gate field programmable gate array.
Claims7
A programmable logic device comprising:
- a plurality of logic elements and connected to each logic element a switch circuit the state of which is controllable to determine connections between the logic elements;
- a storage circuit providing at least one storage location and operatively connected to the switch circuit;
- addressing circuitry operatively connected to a plurality of said storage locations whereby a selected one of said storage locations can be addressed, wherein each storage location can be programmed to hold in mode (a) routing data defining the state of its associated switch circuit or in mode (b) logic data representing the result of a logic function and which is output from a selectively addressed storage location;
- and
- programming circuitry operable to determine whether the storage circuits implement mode (a) or mode (b).
2 more elements
Dependencies are inferred from the claim text.