KR940006805B1 - Method of power interruption and power supply using keyboard scanner - Google Patents

Abstract

Controlling the switching of the power suspend state and power resume state using scanner, this selecting method reduces power consumption. This selecting method comprises: the 1st step (10) of detecting whether the user selecting pin is the power suspend mode or not; the 2nd step (60-90) of controlling and processing the power resume signal at power suspend mode; the 3rd step (20) for detecting whether the key is inputted or not at power resume mode; the 4th step (30,50) of detecting whether power state is suspend state or not, processing the key data at resume mode and going to the next step at suspend mode; and the 5th step (40) of controlling the power resume signal and going to the power resume mode and processing to the 2nd step (20).

Description

How to Select Power Off and Supply Status Using Keyboard Scanner of Personal Computer

1 is a block diagram of hardware to which the present invention is applied.

2 is a flowchart illustrating a method for selecting a power cutoff and a supply state using a keyboard scanner according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Keyboard 2: Keyboard Boss

3: PMU

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power cutoff and a supply state selection method for selecting a power supply cutoff and a maximum power consumption state in a switching operation using a keyboard scanner in a personal computer.

In the related art, the transition between the power suspend mode and the suspend mode was performed using a power management unit (PMU) and an external switch.

Therefore, when designing, an external switch must be configured and there is a problem in that no key is input in the power cut state.

An object of the present invention is to provide a method for selecting a power cut and a supply state that reduces power consumption by controlling switching between a power cut state and a power resupply state using a keyboard scanr of a personal computer. have.

In order to achieve the above object, the present invention provides a power cut and supply state selection method of a system comprising a keyboard, a keyboard scanner connected to the keyboard and including a user selection pin, and a PMU connected to the keyboard scanner. A first step of searching for whether the user select pin is in a power cut state; a second step of controlling and processing a power cut signal if the user select pin is in a power cut state; and searching for key input if the user select pin is in a power supply state In the third step, if the key is input, search for the power-off state, process the key data in the power supply state, proceed to the next step in the power-off state, and control the power resupply signal to the power supply state. And a fifth step of proceeding to a key input search step.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a configuration diagram of hardware to which the present invention is applied, where 1 represents a keyboard, 2 represents a keyboard scanr, and 3 represents a PMU.

The hardware to which the present invention is applied includes a keyboard 1, a keyboard scanner 2 connected to the keyboard 1 and including a user selection pin, and the keyboard scanner 2 as shown in FIG. It consists of a connected PMU (3). The PMU 3 uses the 82347 BIOS of Intel Corporation as a preferred embodiment.

The keyboard scanner 2 is always configured to retrieve the current state output of the PMU 3, in which case the selection pin of the user or the state of the PMU 3 is in the power-off or re-powered state. Drive the control pin accordingly. The use selection pin is activated when the user wants to enter the power down state.

When the entire system enters the power-off state by the PMU 3, that is, due to the input of the time-out state from the power supply state, the keyboard scanner 2 recognizes the current mode as the power-off state. At this time, if there is a key input, the PMU 3 is informed to be in a power resupply state by giving a power cutoff and a power supply control signal without processing key data.

2 is a flowchart illustrating a method for selecting a vehicle blocking and supply state using a keyboard scanner according to the present invention.

First, the user searches whether the selection pin is in the power-off state (10). If the user selects a power resupply state other than the power-off state, the user continues to search the key input until the key is input (20). If a key is input, the system detects whether the entire system is in the power-off state due to the time-out of the power supply state of the PMU 3 (30), and processes the key data if the power supply state is not the power-off state (50). In the power-off state, the PMU 3 is notified to process the power resupply signal without processing key data and proceed to the power resupply state, and the process proceeds to the key retrieval step 20 again (40).

The user selection pin search result 10, when the user wants to enter the power-off state, that is, when the user selection pin is in the power-off state by controlling a power-off signal (60), the user selection pin enters the power-off state The key scanning operation is continued until the power is supplied again (70, 80).

If the user selection pin is in the power-off state from the power-off state to control the power-off signal to proceed to the power supply state (90) and proceeds to step 20 to perform the key scanning operation.

The present invention configured and operated as described above is capable of switching off or supplying power according to the opening and closing of the LCD or an arbitrary system state by using a user selection pin, and easily transitioning to the power supplying state in any key input is conventionally used. The switch circuit for power cut off and supply control is unnecessary, and there is an application effect to extend the life of the battery by applying it to a laptop using a battery.

Claims (2)

A system configured with a keyboard (1), a keyboard scanner (2) connected to the keyboard (1) and including a user selection pin, and a power management unit (PMU) 3 connected to the keyboard scanner (2) In the power cut and supply state selection method of the first step (10) for searching whether the user select pin is a power cut state, and if the user select pin is a power cut state, a second step of controlling and processing a power cut signal ( 60 to 90), if the user selection pin is in a power supply state, a third step 20 of searching for a key input or not, and if a key is input, search for a power cut state to process key data in a power supply state, and The fourth step (30,50) proceeds to the next step, and the fifth step (40) proceeds to the power resupply state by controlling the power resupply signal and proceeds to the key input search step 20 Power characterized in that End and the supply condition selecting method. The method of claim 1, wherein the second step (60 to 90) of processing when the user select pin is in the power cut state is performed by controlling a power cut signal when the user select pin is in the power cut state. 60) continuing the key scanning operation until the user selection pin is in the power resupply state (70, 80), and when the user selection pin is in the power resupply state, controlling the power cutoff signal Power cut and supply state selection method, characterized in that performed by the step (90) to proceed to the re-supply state.