Browse Prior Art Database

Mixture of Field and Factory Programmed Logic Cells in a Single Device

IP.com Disclosure Number: IPCOM000115377D
Original Publication Date: 1995-Apr-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Buterbaugh, EW: AUTHOR

Abstract

The problem of having a very high density logic cell array in a single device that also has the capability of reprogramming various logic cells by the user in the field is solved by a device that incorporates both the masked programmed logic cells and the field programmable logic cells onto a single, integrated device. This allows for the creation of a device that can have a very high function based on the masked programmed cells coexistent with areas of logic cells that can be programmed by the user.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 74% of the total text.

Mixture of Field and Factory Programmed Logic Cells in a Single Device

      The problem of having a very high density logic cell array in a
single device that also has the capability of reprogramming various
logic cells by the user in the field is solved by a device that
incorporates both the masked programmed logic cells and the field
programmable logic cells onto a single, integrated device.  This
allows for the creation of a device that can have a very high
function based on the masked programmed cells coexistent with areas
of logic cells that can be programmed by the user.

      This technology now allows a designer to create a large circuit
function that is known to be stable and applicable for many
applications.  The designer can create this logic and prepare for
manufacture as with any other masked program device.  The designer
also defines an area (or areas) of size on the device that is
reserved field programmable logic cells.  This area can be used for
functions whose logic definition needs the ability to change.  After
this device is manufactured, the user can program the field
programmable logic cells on demand.

      There are many applications of this technology.  One of which
is to create a function that can be used in many applications but
which also must interface to changing and different system busses.
This new technology would allow for the core function to be designed
and implemented in the factory masked programmed logic cells.  T...