Reconfigurable IC that has sections running at different reconfiguration rates

• US 7,656,188 B2
• Filed: 10/12/2007
• Issued: 02/02/2010
• Est. Priority Date: 11/08/2004
• Status: Active Grant

• Current Assignee: Altera Corporation (Intel Corporation)
• Original Assignee: Tabula Incorporated
• Inventors: Teig, Steven, Schmit, Herman, Redgrave, Jason
• Primary Examiner(s): Tan, Vibol
• Application Number:
  US11/871,944
• Publication Number:
  US 20080030227A1
• Time in Patent Office: 844 Days
• Field of Search: 326 38- 41
• US Class Current: 326/38
• CPC Class Codes: H03K 19/17756 for partial configuration or partial reconfiguration
• CPC Class Codes: H03K 19/17758 for speeding up configuration or reconfiguration

Abstract

Some embodiments provide a reconfigurable IC that includes several sections. Each section includes several configurable circuits, each of which configurably performs a set of operations. Each section stores multiple configuration data sets for each configurable circuit. Each configuration data set for a particular configurable circuit specifies the operation that the particular configurable circuit has to perform from the circuit'"'"'s set of operations, where the configurable circuits of at least two different sections change configuration data sets at two different reconfiguration rates.

Claims

1. An integrated circuit (IC) comprising:

a first set of configurable circuits for configurably performing sets of operations based on received configuration data, wherein different configuration data configure a configurable circuit to perform different operations;

a second set of configurable circuits for configurably performing sets of operations based on received configuration data, wherein the first set of configurable circuits changes configuration data at a first frequency while a second set of configurable circuits changes configuration data at a second frequency that is different than the first frequency, wherein different configurable circuits change configuration data at different frequencies when the different configuration circuits receive configuration data at different frequencies;

a first local signal generator for generating signals based on a clock signal to control the configuration frequency of the first set of configurable circuits; and

a second local signal generator for generating signals based on the clock signal to control the configuration frequency of the second set of configurable circuits.

2. The IC of claim 1 further comprising data supplying circuitry for supplying the configuration data to the sets of configurable circuits, wherein a particular data supplying circuit for the first set of configurable circuits receives configuration data at its inputs and selects a configuration data to supply to a configurable circuit of the first set of configurable circuits.

3. The IC of claim 1 further comprising a set of interconnect circuits, wherein the set of interconnect circuits supply an output of one configurable circuit of the first set of configurable circuits to an input of a configurable circuit of the second set of configurable circuits.

4. The IC of claim 1, wherein the first set of configurable circuits implements an input and output interface of the IC.

5. The IC of claim 4, wherein the second set of configurable circuits implements a user design.

6. An integrated circuit (IC) comprising:

a first set of configurable circuits for configurably performing sets of operations based on received configuration data, wherein different configuration data configure a configurable circuit to perform different operations;

a second set of configurable circuits for configurably performing sets of operations based on received configuration data, wherein the first set of configurable circuits changes configuration data at a first frequency while a second set of configurable circuits changes configuration data at a second frequency that is different than the first frequency, wherein different configurable circuits change configuration data at different frequencies when the different configuration circuits receive configuration data at different frequencies; and

a third set of configurable circuits for configurably performing a set of operations based on received configuration data, wherein the configurable circuits of the third set change configuration data sets at a different frequency than the configurable circuits of the first and second sets.

7. An electronic device comprising:

an integrated circuit (IC) comprising;

(a) a first set of configurable circuits for configurably performing sets of operations based on received configuration data, wherein different configuration data configure a configurable circuit to perform different operations;

(b) a second set of configurable circuits for configurably performing sets of operations based on received configuration data, wherein the first set of configurable circuits changes configuration data at a first frequency while the second set of configurable circuits changes configuration data at a second frequency that is different than the first frequency, wherein different configurable circuits change configuration data at different frequencies when the different configuration circuits receive configuration data at different frequencies; and

(c) a third set of configurable circuits for configurably performing sets of operations based on received configuration data, wherein the third set of configurable circuits changes configuration data at a third frequency that is different than the first and second frequencies.

8. An integrated circuit (IC) comprising:

first and second reconfigurable circuits for configurably performing a set of operations based on a set of configuration data;

a first data supplying circuitry for supplying configuration data to the first reconfigurable circuit at a first frequency during a particular duration during the operation of the IC;

a second data supplying circuitry for supplying configuration data to the second reconfigurable circuit at a second frequency during the particular duration, wherein the first and second frequencies are different;

a first local signal generator for generating signals based on a clock signal to direct the first data supply circuitry to supply configuration data to the first reconfigurable circuit at the first frequency; and

a second local signal generator for generating signals based on the clock signal to direct the second data supplying circuitry to supply configuration data to the second reconfigurable circuit at the second frequency.

9. The IC of claim 8, wherein a particular data supplying circuit comprises (1) a set of input terminals for receiving sets of configuration data, (2) a set of output terminals for connecting a particular configuration data set from a particular input terminal to a reconfigurable circuit, and (3) a set of select terminals for selectively connecting configuration data at an input terminal to the output terminal set at a specified frequency.

10. A method of operating first and second reconfigurable circuits of an integrated circuit (IC), the method comprising:

reconfiguring the first reconfigurable circuit at a first frequency during a particular duration during the operation of the IC; and

reconfiguring the second reconfigurable circuit at a second frequency during the particular duration, wherein the first frequency is different than the second frequency;

wherein the first reconfigurable circuit is located in a first section of the IC comprising a first set of reconfigurable circuits and the second reconfigurable circuit is located in a second section of the IC comprising a second set of reconfigurable circuit;

wherein the first section further comprises a first set of configuration data and a first clock signal for supplying configuration data from the first set of configuration data to the first reconfigurable circuit at the first frequency and the second section further comprises a second set of configuration data and a second clock signal for supplying configuration data from the second set of configuration data to the second reconfigurable circuit at the second frequency.

11. The method of claim 10, wherein reconfiguring the first and second reconfigurable circuits occurs at least twice during runtime of the IC.

12. A method of reconfiguring configurable circuits of an integrated circuit (IC), the method comprising:

supplying configuration data sets to a first set of the configurable circuits at a first frequency, wherein different configuration data sets configure a configurable circuit to perform different operations; and

supplying configuration data sets to a second set of the configurable circuits at a second frequency that is different from the first frequency; and

supplying configuration data sets to a third set of the configurable circuits at a third frequency that is different frequency from the first and second frequencies.

13. The method of claim 12, wherein supplying configuration data sets to the first set of the configurable circuits comprises setting the first frequency with a first clock signal.

14. The method of claim 13, wherein supplying configuration data sets to the second set of the configurable circuits comprises setting the second frequency with a second clock signal.

15. The method of claim 14, wherein the first and second clock signals are the same clock signal.