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US 7,120,811 B1Granted
Method and apparatus for detection of a power management state based on a power control signal controlling main power to the computer system and a power control signal controlling power to system memory and waking up therefrom
AssigneeAdvanced Micro Devices, Inc.
InventorsRavi B. Bingi, John Dambik, Brian E. Longhenry
Life of this patent
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Abstract
Power control signals for main power and RAM power are utilized to determine when the system is in the suspend to RAM state. Once the system is determined to be in the suspend to RAM state state, a control circuit detects peripheral activity, such as activity of a mouse or a keyboard, and generate a wake-up signal.
Claims20
A method comprising:
- detecting a power management state according to a value of a first power control signal indicative of a power state for main power for a computer system and according to a value of a second power control signal indicative of a power state for system memory;
- and
- supplying a power management state signal indicative thereof.
An apparatus comprising:
- a first circuit coupled to logically combine a first power control signal indicative of a power state for main power of a computer system and a second power control signal indicative of a power state for system memory and to generate an indication of detection of a power management state.
An apparatus comprising:
- means for detecting the existence of a save to RAM power management state in a computer system according to a first power control signal indicative of a power state for main power of a computer system and a second power control signal indicative of a power state for system memory;
- and
- means for generating a wake-up event in response to one or more signals indicative of a resume event.
Dependencies are inferred from the claim text.