Routing network for reconfigurable circuit
AssigneeNEC Corporation
InventorsXu Bai, Toshitsugu Sakamoto, Yukihide Tsuji, Makoto Miyamura, Ayuka Tada, Ryusuke Nebashi
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Abstract
A reconfigurable circuit comprising: crossbar switches; wires, each of which is coupled to one output port of one crossbar switch and input ports of the other crossbar switches; at least one inverter inserted on each wire for driving long-distance signal transfer, wherein one or less first inverter is inserted on the wire between two adjacent crossbar switches; one or two second inverters inserted between a crossbar switch input port and its connected wire.
Claims10
A reconfigurable circuit comprising:
- crossbar switches;
- wires, each of which is coupled to one output port of one crossbar switch and input ports of the other crossbar switches;
- at least one inverter inserted on each wire for driving long-distance signal transfer, wherein one or less first inverter is inserted on the wire between two adjacent crossbar switches;
- one or two second inverters inserted between a crossbar switch input port and its connected wire,
- a first lookup table that includes one output port connected to the at least one inverter;
- a second lookup table that includes one output port connected to the at least one inverter;
- and
- a third lookup table connected to the at least one inverter,
- wherein the at least one inverter includes at least one inverter between the first lookup table and the third lookup table and at least one inverter between the second lookup table and the third lookup table, and
- the third lookup table selects the output port of the first lookup table or the output port of the second lookup table based on a number of the at least one inverter between the first lookup table and the third lookup table and the number of the at least one inverter between the second lookup table and the third lookup table.
A configuration method for reconfigurable circuit comprising crossbar switches;
- wires, each of which is coupled to one output port of one crossbar switch and input ports of the other crossbar switches;
- first inverters inserted on the wires between crossbar switches for driving long-distance signal transfer;
- second inverters inserted between a crossbar switch input port and its connected wire;
- a third inverter inserted between a crossbar switch output port and its connected wire;
- lookup tables whose output ports are coupled to a part of input ports of the crossbar switches and input ports are coupled to a part of output ports of the crossbar switches, the method comprising:
- counting inverter number between one lookup table input port and its connected output port of another lookup table.
Dependencies are inferred from the claim text.