Logic system and method employing multiple configurable logic bl

Details Logic system and method employing multiple configurable logic bl Logic system and method employing multiple configurable logic bl

1998-02-10

2000-08-01

Gordon, Paul P.

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Sequential or selective

700 7, 700 11, 700 12, 326 38, 326 39, 326 40, 326 46, G05B 1101, G06F 738

Patent

active

060979887

ABSTRACT:
A logic system is presented including multiple configurable logic blocks (CLBs) implementing a state machine having multiple states, each state being associated with one or more logic functions and one or more possible next states. Each CLB includes programmable logic circuitry, and is configurable to implement the logic functions required in any given state. A complex state machine may be implemented using only 1+s CLBs, where s is the maximum number of next states of any state, thereby using a minimum amount of configurable logic. The logic system also includes a memory unit, a control unit coupled to the memory unit and to each of the CLBs, and an interface unit coupled to the control unit and to each of the CLBs. The memory unit stores configuration data required to configure the CLBs and state transition information. The control unit generates and stores current state information. Following programming, a single "active" CLB implements the logic functions required in the current state. The remaining CLBs are "inactive". While in the current state, the control unit uses state transition information from the memory unit and current state information to determine the possible next states. The control unit then retrieves configuration data from the memory unit corresponding to each of the possible next states, and programs one inactive CLB for each possible next state. The interface unit routes input signals to, and output signals from, the active CLB in response to a control signal from the control unit.

REFERENCES:
patent: 5109353 (1992-04-01), Sample et al.
patent: 5787007 (1998-07-01), Bauer
patent: 5802290 (1998-09-01), Casselman
patent: 5892961 (1999-04-01), Trimberger
patent: 5995744 (1999-11-01), Guccione

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