Patents Assigned to Cswitch Corporation
  • Publication number: 20100045493
    Abstract: A system including a serializer/deserializer (SERDES) block including a first SERDES lane, a second SERDES lane, a third SERDES lane, and a fourth SERDES lane; a physical coding sublayer (PCS) block including a layout select tag, a first PCS lane connected to the fourth SERDES lane, a second PCS lane connected to the third SERDES lane, a third PCS lane connected to the second SERDES lane, and a fourth PCS lane connected to the first SERDES lane; and a media access control (MAC) layer block including a first plurality of pins connected to the first PCS lane, a second plurality of pins connected to the second PCS lane, a third plurality of pins connected to the third PCS lane, and a fourth plurality of pins connected to the fourth PCS lane, wherein the PCS block is configured to map the first SERDES lane to the first plurality of pins, the second SERDES lane to the second plurality of pins, the third SERDES lane to the third plurality of pins, and the fourth SERDES lane to the fourth plurality of pins based on
    Type: Application
    Filed: August 21, 2008
    Publication date: February 25, 2010
    Applicant: CSWITCH CORPORATION
    Inventors: Nadeem Fahmi, Jason Alexander Jones
  • Patent number: 7605605
    Abstract: A programmable logic structure is disclosed employing input logic routing cell (ILRC) multiplexers and output logic routing cell (OLRC) multiplexers for making local connections between dedicated logic cells. In a simple programmable logic structure, a dedicated logic cell (DLC) is implemented in a programmable logic structure comprising multiple ILRC multiplexers for port A and multiple OLRC multiplexers for port B. In a multi-level programmable logic structure, multiple columns of dedicated logic cells is designed with columns of dedicated local cells adjacent to each other where each DLC column is used to implement a particular logic function. In a first embodiment, local connections can be made between dedicated logic cells, e.g. an OLRC in a first DLC at level L making local point-to-point connections to an ILRC in a second DLC at level L+1.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: October 20, 2009
    Assignee: Cswitch Corporation
    Inventors: Hare K. Verma, Ravi Sunkavalli, Sudip Nag, Conrad Kong, Bo Hu, Chandra Mulpuri, Ashok Vittal
  • Patent number: 7557605
    Abstract: A system including a plurality of programmable logic blocks, a plurality of special-purpose blocks, and a configurable high-speed mesh interconnect fabric operatively connecting the plurality of programmable logic blocks and the plurality of special-purpose blocks, where the configurable high-speed mesh interconnect fabric is configured to implement a plurality of interconnect pipeline buses spanning across the system.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: July 7, 2009
    Assignee: Cswitch Corporation
    Inventors: Godfrey P. D'Souza, Douglas Laird, Malcolm J. Wing, Colin N. Murphy, Dana L. How, Robert Yu, Jay B. Patel, Ivo Dobbelaere, Jason Golbus, Suresh Subramaniam, Mukunda Krishnappa, Pohrong R. Chu, Dave Trossen, Kevin James
  • Publication number: 20090072856
    Abstract: A system including a configurable memory controller, a memory interface, and a configurable high speed communications fabric comprising a plurality of interconnect stations arranged in an array and operable to implement a plurality of pipelined buses, where the configurable memory controller is operably coupled to the configurable high speed communications fabric using a first interconnect station of the plurality of interconnect stations, where the memory interface is operably coupled to the configurable high speed communications fabric using a second interconnect station of the plurality of interconnect stations, where the plurality of interconnect stations are configured to satisfy a timing requirement of the memory interface, and where the configurable memory controller, the memory interface, and the configurable high speed communications fabric are associated with a configurable integrated circuit.
    Type: Application
    Filed: September 14, 2007
    Publication date: March 19, 2009
    Applicant: Cswitch Corporation
    Inventors: Suresh Subramaniam, Mukunda Krishnappa, Pohrong R. Chu, Jason Golbus, Dana L. How
  • Publication number: 20090073970
    Abstract: A system for parsing frames including a first cell extraction circuit (CEC) configured to identify a first cell from a first frame, a first parser engine operatively connected to the first CEC, where the first parser engine is configured to generate a result based on the first cell, and a first forwarding circuit operatively connected to the first parser engine and configured to forward the result, where the first CEC, the first parser engine, and the first forwarding circuit are associated with a first frame parser unit.
    Type: Application
    Filed: September 14, 2007
    Publication date: March 19, 2009
    Applicant: CSWITCH CORPORATION
    Inventors: Malcolm J. Wing, Jay B. Patel, Jeffrey M. Schroeder
  • Publication number: 20090077308
    Abstract: A system for determining memory addresses including a first content-addressable memory (CAM) configured to generate a first matchvector based on a first key; a first inverse-mask-reverse (IMR) module operatively connected to the first CAM, where the first IMR module is configured to generate a first auxiliary matchvector based on the first matchvector; and a first priority encoder (PE) operatively connected to the first IMR module, where the first PE is configured to output a first encoded memory address based on the first auxiliary matchvector, where the first CAM, the first IMR module, and the first PE are associated with a first reconfigurable content-addressable memory (RCAM).
    Type: Application
    Filed: September 14, 2007
    Publication date: March 19, 2009
    Applicant: Cswitch Corporation
    Inventors: Robert Yu, Dave Trossen, Jack Liu, Mukunda Krishnappa, Kevin James
  • Publication number: 20090072858
    Abstract: A system including a plurality of programmable logic blocks, a plurality of special-purpose blocks, and a configurable high-speed mesh interconnect fabric operatively connecting the plurality of programmable logic blocks and the plurality of special-purpose blocks, where the configurable high-speed mesh interconnect fabric is configured to implement a plurality of interconnect pipeline buses spanning across the system.
    Type: Application
    Filed: September 14, 2007
    Publication date: March 19, 2009
    Applicant: CSWITCH CORPORATION
    Inventors: Godfrey P. D'Souza, Douglas Laird, Malcolm J. Wing, Colin N. Murphy, Dana L. How, Robert Yu, Jay B. Patel, Ivo Dobbelaere, Jason Golbus, Suresh Subramaniam, Mukunda Krishnappa, Pohrong R. Chu, Dave Trossen, Kevin James
  • Publication number: 20090077279
    Abstract: A system for general purpose input-output (IO), including a first pad; an IO buffer comprising the first pad; and an IO datapath logic block operatively connected to the IO buffer, where the IO datapath logic block and the IO buffer are associated with a general purpose IO block in a heterogeneous configurable integrated circuit (HCIC).
    Type: Application
    Filed: September 14, 2007
    Publication date: March 19, 2009
    Applicant: CSWITCH CORPORATION
    Inventors: Jason Golbus, Colin N. Murphy, Alexander D. Taylor
  • Patent number: 7439768
    Abstract: A dedicated logic cell in a programmable logic structure is described that comprises the following primary components: a configurable logic function or look-up table (LL), a dedicated logic function (DL), a sequential logic function (LS), and a control logic function (LC). In this illustration, the dedicated logic cell comprises two configurable logic functions, two sequential logic functions, a dedicate logic function, and a control logic function. In some embodiments, the configurable logic function comprises a plurality of look-up tables coupled to a multiplexer with configurable bits that is capable to perform a four 4-input look-up table, one 6-input look-up tables or a 4-to-1 multiplexer. In the first function that operates as the four 4-input look-up table, the dedicated logic cell has four look-up tables for receiving four inputs respectively.
    Type: Grant
    Filed: October 9, 2006
    Date of Patent: October 21, 2008
    Assignee: CSwitch Corporation
    Inventors: Ravi Sunkavalli, Hare K. Verma, Manoj Gunwani, Elliott Delaye
  • Patent number: 7428722
    Abstract: Logic design apparatus and method provides serial multiplexer chains in a programmable logic fabric, each element in the chain either selects output of block, or passes output from earlier element of the chain. Select line is a decoder structure or output from configurable function generator that is configured at power-on to create correct selection. Using such structure, larger multiplexer, including priority multiplexers, tristate buses or larger look-up tables (LUTs) can be created. These novel structures can implement priority, non-priority or tristate multiplexers.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: September 23, 2008
    Assignee: CSwitch Corporation
    Inventors: Ravi Sunkavalli, Hare Krishna Verma, Sudip Nag, Elliott Delaye
  • Patent number: 7417456
    Abstract: A dedicated logic cell in a programmable logic structure is described that comprises the following primary components: a configurable logic function or look-up table (LL), a dedicated logic function (DL), a sequential logic function (LS), and a control logic function (LC). In this illustration, the dedicated logic cell comprises two configurable logic functions, two sequential logic functions, a dedicate logic function, and a control logic function. In a first embodiment, the dedicated logic cell is constructed with a combination of configurable logic functions that are coupled to a dedicated logic function in order to perform a four 2-input function, an AND function, an OR function, or an XOR function. In a second embodiment, the dedicated logic cell is constructed with a combination of configurable logic functions that are coupled to a dedicated logic function in order to perform a four 2-to-1 multiplexer function.
    Type: Grant
    Filed: October 9, 2006
    Date of Patent: August 26, 2008
    Assignee: CSwitch Corporation
    Inventors: Hare K. Verma, Ravi Sunkavalli, Manoj Gunwani, Chandra Mulpuri
  • Patent number: 7417455
    Abstract: A function generator is described that can be configured as a combinational logic, sequential logic, or routing cell. The function generator couples to a plurality of selector blocks that select a wire from a plurality of inputs. The selected wires are inputs to a function generator. The function generator, when configured as a combinational logic cell, can generate any function of its inputs. The function generator, when configured as a sequential logic cell, behaves as a register, where any of the inputs can be directed to input data, clear, clock enable, or reset signals. The register is configurable to a falling or rising edge flip-flop or a positive or negative level sensitive latch. As a routing element, logic cells selects one of its inputs. The output of the programmable cell can fan out to one or more inputs of another integrated cell.
    Type: Grant
    Filed: May 14, 2005
    Date of Patent: August 26, 2008
    Assignee: CSwitch Corporation
    Inventors: Hare K. Verma, Ashok Vittal
  • Patent number: 7414431
    Abstract: A dedicated logic cell in a programmable logic structure is described that comprises the following primary components: a configurable logic function or look-up table (LL), a dedicated logic function (DL), a sequential logic function (LS), and a control logic function (LC). In this illustration, the dedicated logic cell comprises two configurable logic functions, two sequential logic functions, a dedicate logic function, and a control logic function. In a first embodiment, the dedicated logic cell is constructed with a combination of configurable logic functions that are coupled to a dedicated logic function in order to perform a four 2-input function, an AND function, an OR function, or an XOR function. In a second embodiment, the dedicated logic cell is constructed with a combination of configurable logic functions that are coupled to a dedicated logic function in order to perform a four 2-to-1 multiplexer function.
    Type: Grant
    Filed: October 9, 2006
    Date of Patent: August 19, 2008
    Assignee: Cswitch Corporation
    Inventors: Hare K. Verma, Ravi Sunkavalli, Manoj Gunwani, Elliott Delaye
  • Patent number: 7414432
    Abstract: A dedicated logic cell in a programmable logic structure is described that comprises the following primary components: a configurable logic function or look-up table (LL), a dedicated logic function (DL), a sequential logic function (LS), and a control logic function (LC). In this illustration, the dedicated logic cell comprises two configurable logic function, two sequential logic functions, a dedicate logic function, and a control logic function. In a first embodiment, the dedicated logic cell is constructed with a combination of configurable logic functions that are coupled to a dedicated logic function in order to perform a four 2-input function, an AND function, an OR function, or an XOR function. In a second embodiment, the dedicated logic cell is constructed with a combination of configurable logic functions that are coupled to a dedicated logic function in order to perform a four 2-to-1 multiplexer function.
    Type: Grant
    Filed: October 9, 2006
    Date of Patent: August 19, 2008
    Assignee: Cswitch Corporation
    Inventors: Hare K. Verma, Ravi Sunkavalli, Manoj Gunwani, Chandra Mulpuri
  • Patent number: 7386822
    Abstract: A timing-driven simultaneous placement and floorplanning method based on a multi-layer density system for heterogeneous field programmable gate arrays are disclosed. The field programmable gate arrays are designed with heterogeneous resources including look-up tables, memory blocks and dedicated logic blocks. Each layer in the multi-layer density system is modeled with a different architectural resource. The placement of look-up tables and the floorplan of computational blocks are concurrently determined in the multi-layer density system. A dynamic timing optimization scheme is also seamlessly integrated in the placement process.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: June 10, 2008
    Assignee: Cswitch Corporation
    Inventor: Bo Hu
  • Publication number: 20080129334
    Abstract: Logic design apparatus and method provides serial multiplexer chains in a programmable logic fabric, each element in the chain either selects output of block, or passes output from earlier element of the chain. Select line is a decoder structure or output from configurable function generator that is configured at power-on to create correct selection. Using such structure, larger multiplexer, including priority multiplexers, tristate buses or larger look-up tables (LUTs) can be created. These novel structures can implement priority, non-priority or tristate multiplexers.
    Type: Application
    Filed: January 15, 2008
    Publication date: June 5, 2008
    Applicant: Cswitch Corporation
    Inventors: Ravi Sunkavalli, Hare Krishna Verma, Sudip Nag, Elliott Delaye
  • Patent number: 7368941
    Abstract: A dedicated logic cell in a programmable logic structure is described that comprises the following primary components: a configurable logic function or look-up table (LL), a dedicated logic function (DL), a sequential logic function (LS), and a control logic function (LC). In this illustration, the dedicated logic cell comprises two configurable logic functions, two sequential logic functions, a dedicate logic function, and a control logic function. In a first embodiment, the dedicated logic cell is constructed with a combination of configurable logic functions that are coupled to a dedicated logic function in order to perform a four 2-input function, an AND function, an OR function, or an XOR function. In a second embodiment, the dedicated logic cell is constructed with a combination of configurable logic functions that are coupled to a dedicated logic function in order to perform a four 2-to-1 multiplexer function.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: May 6, 2008
    Assignee: CSwitch Corporation
    Inventors: Hare K. Verma, Ravi Sunkavalli, Manoj Gunwani, Chandra Mulpuri
  • Patent number: 7358765
    Abstract: A dedicated logic cell in a programmable logic structure is described that comprises the following primary components: a configurable logic function or look-up table (LL), a dedicated logic function (DL), a sequential logic function (LS), and a control logic function (LC). In this illustration, the dedicated logic cell comprises two configurable logic functions, two sequential logic functions, a dedicate logic function, and a control logic function. In a first embodiment, the dedicated logic cell is constructed with a combination of configurable logic functions that are coupled to a dedicated logic function in order to perform a four 2-input function, an AND function, an OR function, or an XOR function. In a second embodiment, the dedicated logic cell is constructed with a combination of configurable logic functions that are coupled to a dedicated logic function in order to perform a four 2-to-1 multiplexer function.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: April 15, 2008
    Assignee: Cswitch Corporation
    Inventors: Hare K. Verma, Ravi Sunkavalli, Manoj Gunwani, Elliott Delaye