| 摘要 |
In a computer system having a plurality of power management states, a power management control circuit includes a power management controller which manages power in accordance with the Advanced Configuration and Power Interface (ACPI) power management scheme, and includes a switching circuit that supplies a main power or a standby power to a system memory for the computer system according to a control of the power management controller. When a system state of the computer system is converted into the soft off state of the ACPI power management scheme, the power management controller cuts off power supplied to the system memory for the computer system. Therefore, it is possible to prevent unnecessary power consumption and damage to the system memory and to peripheral circuits when the system memory is removed or mounted from or upon a main board for the computer system.
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