Retrieving data from a configurable IC

• US 7,595,655 B2
• Filed: 06/27/2007
• Issued: 09/29/2009
• Est. Priority Date: 06/27/2007
• Status: Active Grant

• Current Assignee: Altera Corporation (Intel Corporation)
• Original Assignee: Tabula Incorporated
• Inventors: Teig, Steven, Schmit, Herman, Redgrave, Jason, Hutchings, Brad
• Primary Examiner(s): Tan, Vibol
• Application Number:
  US11/769,686
• Publication Number:
  US 20090002016A1
• Time in Patent Office: 825 Days
• Field of Search: 326 38- 41, 716/12, 716/17
• US Class Current: 326/16
• CPC Class Codes: H03K 19/17736 Structural details of routing resources
• CPC Class Codes: H03K 19/17764 for reliability

Abstract

Some embodiments provide a configurable integrated circuit (IC). The IC has configurable logic circuits for performing logical operations, configurable routing circuits for routing signals between the configurable logic circuits, and a network for monitoring data. In some embodiments a method uses at least a subset of the configurable logic circuits and a first subset of the configurable routing circuits to implement a user design circuit on the configurable IC. The method uses a second subset of the configurable routing circuits to pass signals to the network.

Claims

1. For an integrated circuit (IC) comprising a configurable circuit arrangement and a debug network, wherein said configurable circuit arrangement comprises configurable logic circuits for performing logical operations and configurable routing circuits for routing signals between the configurable logic circuits, said debug network for monitoring data, a method comprising:

configuring at least a subset of said configurable logic circuits and a first subset of said configurable routing circuits to implement a design on said IC, wherein said configuring configures a plurality of configurable logic circuits and a plurality of configurable routing circuits to implement a plurality of operations of said design; and

configuring a second subset of said configurable routing circuits to pass data from said implemented design away from a first congested location of said debug network to a second, less congested location of said debug network;

wherein said debug network passes data from the second, less congested location out of the configurable circuit arrangement.

2. The method of claim 1, wherein said second subset of said configurable routing circuits is configured to pass signals from the first congested location of said debug network to the second, less congested location of the debug network because the second subset is not used in implementing the design.

3. The method of claim 1, wherein said configuring of the second subset is a response to congestion in said debug network.

4. The method of claim 1, wherein said IC comprises a set of circuit elements arranged in an array of rows and columns, said debug network has a carrying capacity per clock cycle per column, and a location of said debug network is congested when a column in that location is at or near the carrying capacity of the column in a given clock cycle.

5. The method of claim 4, wherein said clock cycle is a subcycle of a longer user design clock cycle.

8. The method of claim 1, wherein the data received by the debug network from the second subset of configurable routing circuits is for outputting from the IC.

9. The method of claim 1, wherein the IC further comprises input/output (I/O) circuits, wherein said configurable routing circuits are further for passing signals from said configurable logic circuits to said I/O circuits, passing signals from said I/O circuits to said configurable logic circuits, and passing signals among said configurable routing circuits.

6. For an integrated circuit (IC) comprising a configurable circuit arrangement and a debug network, wherein said configurable circuit arrangement comprises configurable logic circuits for performing logical operations and configurable routing circuits for routing signals between the configurable logic circuits, said debug network for monitoring data, a method comprising:

configuring at least a subset of said configurable logic circuits and a first subset of said configurable routing circuits to implement a design on said IC, wherein said configuring configures a plurality of configurable logic circuits and a plurality of configurable routing circuits to implement a plurality of operations of said design;

configuring a second subset of said configurable routing circuits to pass data to said debug network;

wherein said data, received by the debug network from the second subset of configurable routing circuits, is stored in a trace buffer.

7. The method of claim 6, wherein the trace buffer is an on-chip trace buffer, the method further comprising outputting the data stored in the trace buffer from the IC.

10. For an integrated circuit (IC) comprising configurable logic circuits for performing logical operations, configurable routing circuits for routing signals between the configurable logic circuits, and a monitoring network for monitoring data inside of said IC, a method comprising:

defining at least a first configuration data set for configuring at least a subset of said configurable logic circuits and a first subset of said configurable routing circuits to implement a user design on said IC, wherein said first configuration data set configures a plurality of configurable logic circuits and a plurality of configurable routing circuits to simulate operations of a plurality of circuits of the user design; and

defining at least a second configuration data set for configuring a second subset of said configurable routing circuits to route at least one signal from a first location of the IC in which the monitoring network is congested to a second location on the IC in which the monitoring network is less congested , wherein said monitoring network receives the routed signal at said second location.

11. The method of claim 10, wherein said IC comprises a configurable routing fabric for configurably routing signals between said configurable logic circuits, said configurable routing fabric comprising said first and second subsets of configurable routing circuits.

12. The method of claim 10, wherein the first and second subsets of configurable routing circuits form a routing fabric for configurably routing signals between said configurable logic circuits.

13. The method of claim 12, wherein said monitoring network outputs said routed signal outside of the IC.

14. The method of claim 12, wherein said data monitored by the monitoring network comprises a plurality of signals generated within the IC.

15. The method of claim 10, wherein said data monitored by the monitoring network comprises a plurality of user design signals of the user design.

16. The method of claim 10, wherein said data monitored by the monitoring network comprises a signal that is output by a particular configurable logic circuit.

17. The method of claim 10, wherein said second subset of said configurable routing circuits is configured to pass signals from the first congested location of said monitoring network to the second, less congested location of the monitoring network because the second subset is not used in implementing the user design.

18. A computer readable medium storing a computer program for defining configurations of an integrated circuit (IC) comprising configurable logic circuits for performing logical operations, configurable routing circuits for routing signals between the configurable logic circuits, and a monitoring network for monitoring data inside of said IC, the computer program comprising:

a set of instructions for defining at least a first configuration data set for configuring at least a subset of said configurable logic circuits and a first subset of said configurable routing circuits to implement a user design that comprises circuits on said IC, wherein said first configuration data set configures a plurality of configurable logic circuits and a plurality of configurable routing circuits to simulate operations of a plurality of circuits of the user design; and

a set of instructions for defining at least a second configuration data set for configuring a second subset of said configurable routing circuits to route at least one signal from a first location of the IC in which the monitoring network is congested to a second location on the IC in which the monitoring network is less congested, wherein said monitoring network receives the routed signal at said second location.

19. The computer readable medium of claim 18, wherein said monitoring network is for sending monitored data outside of the IC.

20. The computer readable medium of claim 18, wherein said set of instructions for defining at least a second configuration data set comprises a set of instructions to select configurable routing circuits for said second subset at least partly because they are not used to implement the user design.