Method and apparatus for providing intelligent power management

• US 6,523,123 B2
• Filed: 07/27/2001
• Issued: 02/18/2003
• Est. Priority Date: 11/04/1998
• Status: Expired due to Term

• Current Assignee: Kinglite Holdings Inc.
• Original Assignee: Phoenix Technologies Limited (Pharaoh Acquisition LLC)
• Inventors: Barbee, Ronald
• Primary Examiner(s): Myers, Paul R.
• Application Number:
  US09/916,996
• Publication Number:
  US 20010047490A1
• Time in Patent Office: 571 Days
• Field of Search: 713/300-340, 713/501, 713/601
• US Class Current: 713/300
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06F 1/3228 Monitoring task completion, e.g. by use of idle timers, stop commands or wait commands

Abstract

The present invention is an apparatus and method for providing power management apparatus for a circuit in a processor-based system. The apparatus comprises a memory to store instruction sequences by which the processor-based system is processed and a processor coupled to the memory. The stored instruction sequences cause the processor to: (a) determine a system access time of the circuit; (b) determine if the system access time is less than a first predetermined value, if so, increasing an accessibility period of the circuit, during which the circuit is active. Various embodiments are described.

Claims

1. A power management apparatus for a circuit in a processor-based system, comprising:

a memory to store instruction sequences by which the processor-based system is processed, said stored instruction sequences to execute separately from an application program that is using said circuit; and

a processor coupled to the memory, wherein the stored instruction sequences cause the processor to;

(a) determine an operational mode of the circuit, where said operational mode indicates an application type of the application program that is using said circuit;

(b) operate the circuit at one of a first predetermined speed and a second predetermined speed in response to the operational mode of the circuit, said first predetermined speed being slower than the second predetermined speed.

2. The apparatus of claim 1, wherein the stored instruction sequences further cause the processor to (c) determine if a predetermined activity level from an input/output device couple to the circuit within a predetermined period, if so, operating the circuit at third predetermined speed, otherwise operating the circuit at said first predetermined speed.

3. The apparatus of claim 2, wherein said third predetermined speed is between said first predetermined speed and said second predetermined speed.

4. The apparatus of claim 1, wherein said application type corresponds to a type of service said circuit is providing for the application program.

5. The apparatus of claim 4, wherein the type of service said circuit is providing is selected from one of a word processing service, a presentation service and a spreadsheet service.

6. The method of claim 1, wherein determining the operational mode of the circuit comprises determining the operational mode of the circuit using the instruction sequence executing separately from the application program that is using said circuit, said operational mode to indicate a type of service said circuit is providing for the application program.

7. The method of claim 6, wherein determining the operational mode of the circuit comprises determining the operational mode of the circuit using the instruction sequence executing separately from the application program that is using said circuit, said operational mode to indicate an a type of service said circuit is providing for the application program, wherein the type of service said circuit is providing is selected from one of a word processing service, a presentation service and a spreadsheet service.

8. A method for providing power management for a circuit in a processor-based system, comprising:

(a) determining an operational mode of the circuit using an instruction sequence executing separately from an application program that is using said circuit, said operational mode to indicate an application type of the application program that is using said circuit; and

(b) operating the circuit at one of a first predetermined speed and a second predetermined speed in response to the operational mode of the circuit, said first predetermined speed being slower than the second predetermined speed.

9. The method of claim 8, further comprising:

(c) determining if there is a predetermined activity level from an input/output device coupled to the circuit within a predetermined period, if so, operating the circuit at a third predetermined speed, otherwise operating the circuit at said first predetermined speed.

10. A computer-readable apparatus, comprising:

a computer-readable medium that stores an instruction sequence which when executed by a processor causes the processor to;

(a) determine an operational mode of the circuit that indicates an application type of an application program that is using said circuit, said instruction sequence to be executed separate from the application program that is using said circuit; and

(b) operating the circuit at one of a first predetermined speed and a second predetermined speed in response to the operational mode of the circuit, said first predetermined speed being slower than the second predetermined speed.

11. The computer-readable apparatus of claim 10, wherein the stored instruction sequences further cause the processor to (c) determine if there is a predetermined activity level from an input/output device coupled to the circuit within a predetermined period, if so, operating the circuit at a third predetermined speed, otherwise operating the circuit at said first predetermined speed.

12. The computer-readable apparatus of claim 10, wherein said application type corresponds to a type of service said circuit is providing for the application program.

13. The computer-readable apparatus of claim 12, wherein the type of service said circuit is providing is selected from one of a word processing service, a presentation service and a spreadsheet service.