Storage elements for a configurable IC and method and apparatus for accessing data stored in the storage elements

• US 7,330,050 B2
• Filed: 03/15/2005
• Issued: 02/12/2008
• Est. Priority Date: 11/08/2004
• Status: Expired due to Fees

• Current Assignee: Altera Corporation (Intel Corporation)
• Original Assignee: Tabula Incorporated
• Inventors: Redgrave, Jason
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Crawford, Jason
• Application Number:
  US11/082,203
• Publication Number:
  US 20070241775A1
• Time in Patent Office: 1,064 Days
• Field of Search: 326 37- 41, 326/47, 327 51- 57, 365/189.02, 365/189.05, 365/230.02, 365/230.03
• US Class Current: 326/38
• CPC Class Codes: H03K 19/17736 Structural details of routing resources
• CPC Class Codes: H03K 19/1776 for memories

Abstract

Some embodiments provide a circuit for accessing stored data in a configurable IC that includes several configurable circuits. The IC also includes several storage circuits. Each storage circuit has (1) several storage elements for storing data for the configurable circuits, and (2) output circuitry for outputting data stored in the storage elements. The output circuitry includes a first set of interconnects for receiving at least a first repeating periodic signal and for periodically outputting data from at least two storage elements to the configurable circuits.

Claims

1. A configurable integrated circuit (IC) comprising:

a) a plurality of configurable circuits;

b) a plurality of storage circuits, each storage circuit comprising (i) a plurality of storage elements for storing data for the configurable circuits and (ii) an output circuit for outputting data stored in the storage elements;

c) said output circuit comprising a first set of interconnects for receiving at least a first repeating periodic signal and a set of sense amplifiers for sensing the data stored in the storage elements, said first set of interconnects further for periodically outputting data from at least two storage elements to the configurable circuits.

2. The configurable IC of claim 1 further comprising a second set of interconnects connected to the output circuit, said second set of interconnects for receiving at least a second repeating periodic signal.

3. The configurable IC of claim 2, wherein the first and second periodic signals have different frequencies.

4. The configurable IC of claim 2, wherein the first periodic signal has a first frequency and the second periodic signal has a second frequency, said first and second sets of interconnects for providing stored data from the storage elements to the configurable circuits at a third frequency.

5. The configurable IC of claim 2, wherein the second set of interconnects directly connects to the output circuit.

6. The configurable IC of claim 1, wherein each sense amplifier is a level converting sense amplifier.

7. The configurable IC of claim 6, wherein each sense amplifier is level converting because the storage elements store data at a reduced voltage level.

8. The configurable IC of claim 1, wherein at least one sense amplifier is for controllably sensing the data stored in a plurality of storage elements.

9. The configurable IC of claim 8, wherein each sense amplifier controllably connects to a storage element through the interconnects in the first set of interconnects.

10. The configurable IC of claim 8, wherein the set of sense amplifiers comprises a plurality of sense amplifiers.

11. The configurable IC of claim 1, wherein the data is configuration data for configuring the configurable circuits.

12. An electronic device comprising:

a configurable integrated circuit (IC) comprising;

a plurality of configurable circuits;

a plurality of storage circuits, each storage circuit comprising (i) a plurality of storage elements for storing data for the configurable circuits and (ii) an output circuit for outputting data stored in the storage elements;

said output circuit comprising a first set of interconnects for receiving at least a first repeating periodic signal and a set of sense amplifiers for sensing the data stored in the storage elements, said first set of interconnects further for periodically outputting data from at least two storage elements to the configurable circuits.

13. The electronic device of claim 12, wherein the configurable IC further comprises a second set of interconnects connected to the output circuit, said second set of interconnects for receiving at least a second repeating periodic signal.

14. The electronic device of claim 13, wherein the first and second periodic signals have different first and second frequencies.

15. The electronic device of claim 14, said first and second sets of interconnects for providing stored data from the storage elements to the configurable circuits at a third frequency.

16. The electronic device of claim 13, wherein the second set of interconnects directly connects to the output circuit.

17. The electronic device of claim 12, wherein at least one sense amplifier is for controllably sensing the data stored in a plurality of storage elements.

18. The electronic device of claim 17, wherein each sense amplifier controllably connects to a storage element through the interconnects in the first set of interconnects.

19. A configurable integrated circuit (IC) comprising:

a) a plurality of configurable circuits;

b) a plurality of storage circuits, each storage circuit comprising (i) a plurality of storage elements for storing data for the configurable circuits and (ii) a sense amplifier for outputting data stored in the storage elements;

c) said sense amplifier comprising first set of a interconnects for receiving at least a first repeating periodic signal and for periodically outputting data from at least two storage elements to the configurable circuits.

20. The configurable IC of claim 19, wherein the data is configuration data for configuring the configurable circuits.

21. The configurable IC of claim 20, wherein the configurable IC is a reconfigurable IC, wherein a configurable circuit receives at least two different configuration data sets at a particular frequency related to the frequency of the first periodic signal.

22. A configurable integrated circuit (IC) comprising:

a) a plurality of configurable circuits;

b) a plurality of storage circuits, each storage circuit comprising (i) a plurality of storage elements for storing data for the configurable circuits and (ii) an output circuit for outputting data stored in the storage elements;

c) said output circuit comprising a first set of interconnects for receiving at least a first repeating periodic signal and for periodically outputting data from at least two storage elements to the configurable circuits;

d) a second set of interconnects connected to the output circuit, said second set of interconnects for receiving at least a second repeating periodic signal;

e) a set of intervening circuits between the second set of interconnects and the output circuit.

23. The configurable IC of claim 22, wherein the first and second periodic signals have different first and second frequencies.

24. The configurable IC of claim 23, said first and second sets of interconnects for providing stored data from the storage elements to the configurable circuits at a third frequency.

25. The configurable IC of claim 22, wherein the intervening circuits include a set of sense amplifiers for sensing the data stored in the storage elements.

26. An electronic device comprising:

a configurable integrated circuit (IC) comprising;

a plurality of configurable circuits;

a plurality of storage circuits, each storage circuit comprising (i) a plurality of storage elements for storing data for the configurable circuits and (ii) an output circuit for outputting data stored in the storage elements;

said output circuit comprising a first set of interconnects for receiving at least a first repeating periodic signal and for periodically outputting data from at least two storage elements to the configurable circuits;

a second set of interconnects connected to the output circuit, said second set of interconnects for receiving at least a second repeating periodic signal;

a set of intervening circuits between the second set of interconnects and the output circuit.

27. The electronic device of claim 26, wherein the first and second periodic signals have different first and second frequencies, said first and second sets of interconnects for providing stored data from the storage elements to the configurable circuits at a third frequency.

28. An electronic device comprising:

a configurable integrated circuit (IC) comprising;

a plurality of configurable circuits;

a plurality of storage circuits, each storage circuit comprising (i) a plurality of storage elements for storing data for the configurable circuits and (ii) a sense amplifier for outputting data stored in the storage elements;

said sense amplifier comprising a first set of interconnects for receiving at least a repeating periodic signal and for periodically outputting data from at least two storage elements to the configurable circuits.