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Apparatus-and-method-for-displaying-PMS-information-in-a-portable-computer

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Apparatus and method for displaying PMS information in a portable computer

Details

Inventors: Seo, Seung-Won;
Assignee: SamSung Electronics Co., Ltd. (Suwon, KR)
Primary Examiner: Harvey; Jack B.
Assistant Examiner: Darbe; Valerie
Attorney, Agent or Firm: Bushnell, Esq.; Robert E.

An apparatus and method for displaying power management system (PMS) information in a portable computer includes a video random access memory (RAM) for storing the power management system (PMS) information as a preset data configuration. A keyboard controller outputs a signal corresponding to an operating state represented by a user key selection and a system interrupt signal. A power management system (PMS) controller outputs a corresponding signal after sensing a present charging/discharging state of the voltage of a battery. A real-time clock (RTC) stores data corresponding to the mode and level of the power management system (PMS) set during an initial set-up step of computer operation. A video controller reads the power management system (PMS) information stored in the video random access memory (RAM), and displays the information as a preset data configuration on a display unit when a corresponding key signal is output from the keyboard controller. A central processing unit (CPU) reads the present battery level from the power management system (PMS) controller, reads the mode and level of the power management system (PMS) stored in the real-time clock (RTC) when an interrupt signal is generated from the keyboard controller, and controls the operation of displaying the power management system (PMS) information.

DETAILED DESCRIPTION Accordingly, it is an object of the present invention to provide an improved apparatus and method for displaying power management system (PMS) information in a portable computer.
It is another object to provide an apparatus and method for enabling display of power management system (PMS) information in a portable computer by providing a separate video memory in which the power management system (PMS) information is stored.
It is still another object to provide an apparatus and method for providing a user with a display of current power management system (PMS) information in response to one or more key inputs.
It is yet another object to provide an apparatus and method for enabling a user to enter new power management system (PMS) information in response to one or more key inputs.
It is still yet another object to provide an apparatus and method for a portable computer in which a central processing unit (CPU) stops performance of all current tasks and enables display of power management system (PMS) information in response to a system interrupt.
To achieve these and other objects, the present invention provides a video random access memory (RAM) for storing power management information comprised of data indicative of an operating mode and an operating level of a power management system (PMS) of the portable computer, data indicative of a remaining energy capacity of a battery used to provide operating power to the portable computer, and data indicative of whether the battery or an alternating current (AC) adapter is being used to provide operating power to the portable computer.
A keyboard controller provides output of a key signal corresponding to a key input provided by a user and a system interrupt signal.
A power management system (PMS) controller provides output of a voltage signal corresponding to a sensed voltage of the battery.
A real-time clock (RTC) stores the data indicative of the operating mode and operating level of the power management system (PMS) at an initial set-up operation of the portable computer

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