Mask-programmable logic device with programmable portions

Details Mask-programmable logic device with programmable portions Mask-programmable logic device with programmable portions

2006-06-20

2006-06-20

Tran, Anh Q. (Department: 2819)

Electronic digital logic circuitry

Multifunctional or programmable

Array

C326S039000, C326S047000, C326S101000

Reexamination Certificate

active

07064580

ABSTRACT:
A mask-programmable logic device includes some circuitry that is electrically programmable as in conventional programmable logic devices. This allows a user to adjust certain characteristics of programmed devices whose logic functions have been proven and need not change, but which operate in an environment that changes, necessitating different characteristics, without having to redesign the programming metallization layers, and therefore without involving the device manufacturer. The programmable elements may include input/output elements, which may need adjustment because the signal characteristics of the larger system change, or clock circuitry, which may need adjustment because environmental conditions such as changes in the expected operating temperature may affect clock signals in the larger system.

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