Method for self-reconfiguration of logic in a field programmable

Details Method for self-reconfiguration of logic in a field programmable Method for self-reconfiguration of logic in a field programmable

1997-12-12

2000-04-25

Tokar, Michael

Electronic digital logic circuitry

Multifunctional or programmable

Array

326 41, H03K 19177

Patent

active

060548711

ABSTRACT:
A method for controlling the operation of an FPGA. Initially, a function generator of the FPGA is configured as a ROM look up table which holds a first set of data values. These data values are selectively routed to an output terminal of the function generator in response to a plurality of input signals which are provided to the function generator. The first set of data values is selected to define a first function implemented by the function generator. Subsequently, the function generator is reconfigured as a user RAM, thereby enabling a second set of data values to be written to the function generator. The function generator is then reconfigured as a ROM look up table which holds the second set of data values. These data values are selectively routed to the output terminal of the function generator in response to the input signals provided the function generator. The second set of data values is selected to define a second function implemented by the function generator. In the foregoing manner, the function generator is dynamically reconfigured to perform different functions during normal operation of the FPGA. The function generator is reconfigured in response to configuration data stored in a local memory, thereby enabling the reconfiguration to be performed in a relatively short time period. The ability to dynamically reconfigure the function generator such that the function generator performs different functions effectively enables an increased logic density with respect to conventional FPGAs.

REFERENCES:
patent: 5600263 (1997-02-01), Trimberger et al.
patent: 5787007 (1998-07-01), Bauer
Xilinx The Programmable Logic Data Book, 1996, available from Xilinx, Inc., 2100 Logic Drive, San Jose, CA 954124, pp. 4-1 to 4-178.

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