Trigger circuits and event counters for an IC

• US 8,755,484 B2
• Filed: 10/04/2012
• Issued: 06/17/2014
• Est. Priority Date: 08/04/2008
• Status: Active Grant

• Current Assignee: Tahoe Research Limited (f/k/a Learndale Limited) (Vector Capital Corporation)
• Original Assignee: Tabula Incorporated
• Inventors: Hutchings, Brad L., Redgrave, Jason, Huang, Dai, Teig, Steven
• Primary Examiner(s): Lam, Tuan T
• Application Number:
  US13/645,314
• Publication Number:
  US 20130156146A1
• Time in Patent Office: 621 Days
• Field of Search: None
• US Class Current: 377/26
• CPC Class Codes: G06F 1/04 Generating or distributing clock signals or signals derived directly therefrom
• CPC Class Codes: G06M 3/00 Counters with additional facilities generating electric pulses at random intervals H03K3/84
• CPC Class Codes: H03K 19/017581 programmable
• CPC Class Codes: H03K 19/17728 Reconfigurable logic blocks, e.g. lookup tables
• 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 19/1776 for memories
• CPC Class Codes: H03K 19/17764 for reliability

Abstract

Some embodiments provide an integrated circuit (“IC”). The IC includes multiple configurable circuits that configurably perform operations of a user design based on configuration data. The IC also includes a configurable trigger circuit that receives a set of configuration data that specifies an operational event. The configurable trigger circuit also determines whether the operational event has occurred during implementation of the user design of the IC. Additionally, the operational trigger event outputs a trigger signal upon determining that the operational trigger event has occurred.

Claims

1. An integrated circuit (“

IC”

) comprising;

a primary network and a secondary network;

a plurality of groups of configurable circuits for configurably performing operations based on configuration data, wherein the plurality of groups of configurable circuits configurably perform the operations by using the primary network while the secondary network configurably monitors the configurable circuits without interrupting the operations of the configurable circuits in the primary network; and

at least one event counter circuit for (i) receiving a detection signal that indicates that an operational event based on an operation of the configurable circuits has occurred in the IC, (ii) storing a count value that records a number of times said detection signal is received, and (iii) generating an event signal based on the stored count value, wherein the event counter circuit is accessible over the secondary network.

2. The IC of claim 1 further comprising a network for reading said count value of said event counter while a particular group of configurable circuits is performing the operations based on the configuration data.

3. The IC of claim 1, wherein said recording comprises one of an increment and a decrement operation.

4. The IC of claim 1, wherein said event counter circuit resets to an initial count value when the operational event does not occur.

5. The IC of claim 1, wherein said event counter circuit generates the event signal when the count value has reached a particular count.

6. The IC of claim 5, wherein the event counter circuit is configured to count a number of consecutive clock cycles that a particular event has occurred.

7. The IC of claim 1, wherein the secondary network is further for reconfiguring a first group of the configurable circuits without interrupting the operations of a second group of the configurable circuits.

8. The IC of claim 1, wherein the event counter circuit receives the detection signal from the secondary network.

9. An integrated circuit (“

IC”

) comprising;

a primary network and a secondary network;

a plurality of configurable circuits for configurably performing operations based on configuration data, wherein the configurable circuits configurably perform the operations by using the primary network;

a plurality of event counters for configurably counting a number of occurrences of a plurality of operational events based on the operations performed by the plurality of configurable circuits, wherein the operational events are configurably monitored and provided to the plurality of event counters, wherein the event counter circuit is accessible over the secondary network without interrupting the operations of the plurality of configurable circuits.

10. The IC of claim 9, wherein the configurable circuits configurably perform the operations by using the primary network while the secondary network configurably monitors the configurable circuits without interrupting the operations of the configurable circuits in the primary network.

11. The IC of claim 10, wherein the secondary network is further for reconfiguring a first group of the configurable circuits without interrupting the operations of a second group of the configurable circuits.

12. An electronic device comprising:

an integrated circuit (“

IC”

) comprising;

a primary network and a secondary network;

a plurality of groups of configurable circuits for configurably performing operations based on configuration data, wherein the plurality of groups of configurable circuits configurably perform the operations by using the primary network while the secondary network configurably monitors the configurable circuits without interrupting the operations of the configurable circuits in the primary network; and

at least one event counter circuit for (i) receiving a detection signal that indicates that an operational event based on an operation of the configurable circuits has occurred in the IC, (ii) storing a count value that is updated upon receiving said detection signal, and (iii) generating an event signal based on the stored count value, wherein the event counter circuit is accessible over the secondary network; and

a memory device for providing the configuration data to the IC.

13. The electronic device of claim 12 further comprising a network for reading said count value of said event counter while a particular group of configurable circuits is performing the operations based on the configuration data.

14. The electronic device of claim 12, wherein said event counter circuit resets to an initial count value when the operational event does not occur.

15. The electronic device of claim 12, wherein said event counter circuit generates the event signal when the count value has reached a particular count.

16. The electronic device of claim 15, wherein the event counter circuit is configured to count the number of consecutive clock cycles that a particular event has occurred.

17. The electronic device of claim 12, wherein the secondary network is further for reconfiguring a first group of the configurable circuits without interrupting the operations of a second group of the configurable circuits.

18. The electronic device of claim 12, wherein the event counter circuit receives the detection signal from the secondary network.