Runtime loading of configuration data in a configurable IC

• US 7,492,186 B2
• Filed: 03/13/2006
• Issued: 02/17/2009
• Est. Priority Date: 07/15/2005
• Status: Active Grant

• Current Assignee: Tahoe Research Limited (f/k/a Learndale Limited) (Vector Capital Corporation)
• Original Assignee: Tabula Incorporated
• Inventors: Teig, Steven, Hutchings, Brad, Khubchandani, Teju, Redgrave, Jason, Schmit, Herman
• Primary Examiner(s): Tran, Anh Q
• Application Number:
  US11/375,364
• Publication Number:
  US 20080272801A1
• Time in Patent Office: 1,072 Days
• Field of Search: 326 38- 41
• US Class Current: 326/39
• CPC Class Codes: H03K 19/1731 Optimisation thereof
• CPC Class Codes: H03K 19/177 arranged in matrix form
• CPC Class Codes: H03K 19/17704 the logic functions being realised by the interconnection of rows and columns
• CPC Class Codes: H03K 19/17736 Structural details of routing resources
• CPC Class Codes: H03K 19/17748 Structural details of configuration resources
• CPC Class Codes: H03K 19/17756 for partial configuration or partial reconfiguration
• CPC Class Codes: H03K 19/17764 for reliability

Abstract

Some embodiments of the invention provide a configurable integrated circuit (IC) that has several configurable circuits for configurably performing different operations. During the operation of the IC, each particular configurable circuit performs a particular operation that is specified by a particular configuration data set for the particular configurable circuit. While the IC operates and a first set of configurable circuits performs a first set of operations, configuration data is loaded from the outside of the IC for configuring a second set of configurable circuits. In some embodiments, the configurable IC includes a configuration network for rapid loading configuration data in the IC from outside of the IC. In some of these embodiments, the configuration network is a pipelined network. Also, the IC of some embodiments includes a configuration controller for retrieving configuration data from outside of the IC, formulating configuration data sets, and routing the configuration data sets to the second set of configurable circuits over the configuration network.

Claims

1. An integrated circuit (IC) comprising:

a) a plurality of groups of configurable circuits for configurably performing different operations, each particular configurable circuit for receiving at least one configuration data set for specifying a particular operation that the particular configurable circuit has to perform; and

b) a plurality of sets of storage elements, wherein each set of storage elements is communicatively coupled to at least two groups, wherein a plurality of sets of storage elements are for loading, in a pipeline fashion, configuration data for configuring a first set of configurable circuits to perform a first set of operations while the IC operates and a second set of configurable circuits performs a second set of operations.

2. The IC of claim 1 further comprising a configuration network for rapidly loading configuration data into the IC from outside of the IC.

3. The IC of claim 2, wherein the configuration network is separate from a data routing network for routing data between the configurable circuits during the operation of the IC.

4. The IC of claim 2, wherein the configuration network is a pipelined network.

5. The IC of claim 4, wherein the pipelined configuration network is for concurrently carrying multiple configuration data sets for multiple configurable circuits.

6. The IC of claim 2 further comprising a configuration controller for receiving configuration data from outside of the IC, formulating configuration data sets, and routing the configuration data sets to at least one group over the configuration network.

7. The IC of claim 1, wherein the configuration data is loaded from a non-volatile memory outside of the IC.

12. The IC of claim 1, wherein loading a first configuration data set in a pipelined fashion comprises (i) receiving the first configuration data set at a first set of storage elements, (ii) storing the first configuration data set at the first set of storage elements, (iii) during said storing, supplying the first configuration data set to at least one group to which the set of storage elements is coupled, and (iv) sending the first configuration data set from the first set of storage elements to a second set of storage elements.

8. A method of operating an integrated circuit (IC) comprising a plurality of configurable circuits, the method comprising:

a) loading first and second configuration data sets for configuring first and second sets of configurable circuits;

b) operating the IC based on the first and second configuration data sets;

c) while the IC operates and the first set of configurable circuits operates based on the first configuration data set, loading a third configuration data set for changing the configuration of the second set of configurable circuits.

9. The method of claim 8, wherein the loading of the configuration data sets is accomplished through a configuration network for rapidly loading configuration data into the IC from outside of the IC.

10. The method of claim 9 further comprising:

a) receiving configuration data from outside of the IC;

b) formulating configuration data sets; and

c) routing the configuration data sets to the second set of configurable circuits over the configuration network.

11. An integrated circuit (IC) comprising:

a) a plurality of configurable circuits for configurably performing different operations; and

b) a configuration network for loading configuration data sets into the IC from outside of the IC;

wherein the configuration network comprises a plurality of lines traversing a plurality of groups of configurable circuits, said plurality of lines for allowing at least two groups to receive and examine each configuration data set, wherein examining at a particular group comprises determining whether a particular configuration data set is directed to the particular group;

wherein the configuration data sets are for configuring the configurable circuits to perform particular operations;

wherein during at least one operational period of the IC, said configuration network is for routing a particular configuration data set for a first set of configurable circuits to the first set of configurable circuits while a second set of configurable circuits is performing a set of operations.

13. A device comprising:

an integrated circuit (IC) comprising;

a) a plurality of groups of configurable circuits for configurably performing different operations, each particular configurable circuit for receiving at least one configuration data set for specifying a particular operation that the particular configurable circuit has to perform; and

b) a plurality of sets of storage elements, wherein each set of storage elements is communicatively coupled to at least two groups, wherein a plurality of sets of storage elements are for loading, in a pipeline fashion, configuration data for configuring a first set of configurable circuits to perform a first set of operations while the IC operates and a second set of configurable circuits performs a second set of operations.

14. The device of claim 13 further comprising a memory for storing configuration data and outputting the configuration data to the IC.

15. An apparatus comprising:

a) a plurality of configurable circuits in an arrangement, said configurable circuits for configurably processing data sets;

b) a configuration network for loading configuration data into the arrangement, said configuration data for configuring at least one configurable circuit; and

c) a data processor for (i) receiving a first data set for processing by at least one configurable circuit, (ii) identifying that the configurable circuits are not configured to process the first data set, and (iii) causing the configuration network to load an appropriate configuration data set into the arrangement while at least one configurable circuit processes a second data set.

16. The apparatus of claim 15, wherein the data processor is further for routing each data set to at least one configurable circuit.

17. The apparatus of claim 15, wherein the data processor is further for determining that at least one configurable circuit is configured to process the first data set.

18. The apparatus of claim 15, wherein the configuration network comprises a configuration controller for retrieving configuration data from outside of the arrangement.

19. The apparatus of claim 18, wherein the configuration controller is further for formulating configuration data sets based on the received configuration data.

20. The apparatus of claim 19, wherein the configuration controller is further for routing each configuration data set to at least one configurable circuit.

21. The apparatus of claim 15, wherein the first data set is encrypted, and the configuration data set is a decryption algorithm.

22. The apparatus of claim 15 further comprising an integrated circuit (“

IC”

) comprising said configurable circuits and said configuration network.

23. The apparatus of claim 22 further comprising a memory outside of the IC for storing configuration data for loading into the configuration network.

24. The apparatus of claim 15 further comprising:

a) a data grabber for identifying that the first data set is for processing by at least one configurable circuit;

b) a memory outside of the arrangement for storing each data set identified by the data grabber as being for processing by at least one configurable circuit until such time that the configuration data is loaded for the at least one configurable circuit.

25. An integrated circuit (IC) comprising:

a) a plurality of configurable circuits in an arrangement, said configurable circuits for configurably processing data sets;

b) a configuration network for loading configuration data into the arrangement, said configuration data for configuring at least one configurable circuit; and

c) a data processor for (i) receiving a first data set for at least one configurable circuit to process, (ii) identifying that the configurable circuits are not configured to process the first data set, and (iii) instructing the configuration network to load an appropriate configuration data set into the arrangement while at least one configurable circuit processes a second data set.

26. The IC of claim 25 further comprising a memory outside of the arrangement for storing configuration data for loading into the configuration network.

27. The IC of claim 25 further comprising a data network for loading data sets for the configurable circuits to process into the arrangement.

28. The IC of claim 27 further comprising a data grabber for identifying that the first data set is for processing by at least one configurable circuit.

29. The IC of claim 28 further comprising a memory outside of the arrangement for storing each data set identified by the data grabber as being for processing by at least one configurable circuit.

30. The IC of claim 29 wherein the data processor retrieves each data set from the memory.

31. An integrated circuit (IC) comprising:

a) a plurality of groups of configurable circuits for configurably performing different operations; and

b) a network comprising;

i) a plurality of lines that traverse multiple groups, said lines for carrying configuration data simultaneously on the same set of lines for multiple groups; and

ii) a plurality of sets of storage elements for dividing the plurality of lines into a plurality of sets of different line segments, wherein two sets of line segments that are on two sides of a particular set of storage elements are for carrying two different data sets.