Merged logic element routing multiplexer
AssigneeAltera Corporation
InventorDavid Lewis
Life of this patent
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Abstract
A merged logic element routing multiplexer circuit includes one or more inputs coupled to the logic element (LE) output, one or more tri-stated circuits coupled to the corresponding one or more inputs, wherein the tri-stated circuits are controlled by a set of programmable select signals, and an output port coupled to the inter logic array block (LAB) routing wire, where the output port is connected to outputs of the tri-stated circuits through a buffer circuit.
Claims28
A merged logic element routing multiplexer (MLRM) for driving a signal between a logic element (LE) output and an inter logic block array (LAB) routing wire in a programmable logic device, comprising:
- one or more inputs coupled to the LE output;
- one or more tri-stated circuits coupled to the corresponding one or more inputs, wherein the tri-stated circuits are controlled by a set of programmable select signals;
- and
- an output port coupled to the inter-LAB routing wire, wherein the output port is connected to output ports of the tri-stated circuits through a buffer circuit.
A programmable logic device, comprising:
- a first logic element (LE) of a sender logic array block (LAB);
- an inter-LAB routing wire connected to one or more receivers;
- and
- a merged logic element routing multiplexer (MLRM) for receiving outputs from the first LE of the sender LAB and driving the inter-LAB routing wire connected to the one or more receivers.
A programmable logic device, comprising:
- a first logic element (LE) of a sender logic array block (LAB);
- an inter-LAB routing wire connected to one or more receivers;
- and
- a merged logic element routing multiplexer (MLRM) for receiving outputs from the first LE of the sender LAB and driving the inter-LAB routing wire connected to the one or more receivers,
- wherein the inter-LAB routing wire is a star wire for routing signals to the plurality of LABs on four directions of the MLRM both horizontally and vertically.
Dependencies are inferred from the claim text.