Electrical computers and digital processing systems: memory – Storage accessing and control – Shared memory area
Patent
1995-08-18
1998-07-07
Swann, Tod R.
Electrical computers and digital processing systems: memory
Storage accessing and control
Shared memory area
711156, 711173, 711117, G06F 1202
Patent
active
057784396
ABSTRACT:
In accordance with the present invention, a programmable array includes hierarchical configuration and state storage. The array comprises an active storage for an active configuration and an active state as well as an inactive storage for one or more inactive configurations and one or more inactive states. The array further comprises logic and routing configured by the active configuration. The logic includes a plurality of combinational elements and a plurality of sequential logic elements for providing the states. Bits are transferred between the active and the inactive storage. The inactive storage is accessible for read or write operations by the active configuration by a structure comprising: a core including a plurality of configurable elements selectively coupled to each other, a memory controller for controlling the memory that configures the logic and routing in accordance with the active configuration, a command register to hold commands for the memory controller, a memory address register to address the memory, and a memory data register coupled to the memory and the plurality of combinational elements. In one embodiment, the array of the present invention includes a configurable routing structure for providing the active configuration access to the memory address register, the memory data register, and the command register. The configurable routing structure is generally controlled by signals from the user logic, thereby significantly increasing user flexibility in using the programmable array.
REFERENCES:
patent: 3775756 (1973-11-01), Balser
patent: 4237545 (1980-12-01), Deglin
patent: 4288658 (1981-09-01), Bieber
patent: 4434461 (1984-02-01), Puhl
Carberry Richard A.
Johnson Robert Anders
Trimberger Stephen M.
Wong Jennifer
Harms Jeanette S.
Klivans Norman R.
Peikari J.
Swann Tod R.
Xilinx , Inc.
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