KR100195204B1 - Power saving device - Google Patents

Abstract

An apparatus and a method for performing a time function for reducing power consumption are disclosed. The apparatus includes a ROM for storing an operating program; A clock counter that performs counting according to a pulse signal in seconds and generates a clock interrupt in seconds or minutes according to a state of a switching signal; And a central processing unit that executes an operation program stored in the ROM and performs a time function according to a second or minute clock interrupt from the clock counter. According to the present invention, the power consumption can be reduced by performing the minute time function instead of the second time when waiting for operation.

Description

Apparatus and method for performing time function to reduce power consumption

1 is a flowchart illustrating a conventional method of performing a time function.

2 is a block diagram illustrating an apparatus for performing time function according to the present invention.

3 and 4 are flowcharts illustrating a method of performing a time function according to the present invention.

The present invention relates to a device and a method for performing a time function used in a portable device having a relatively longer operation waiting time than an operating time, and more particularly, to select a normal second time function or a minute time function according to a setting state of a switching signal. The present invention relates to an apparatus and a method for performing time function that can reduce power consumption by minimizing unnecessary operation.

In general, portable devices that can be carried are relatively much longer in waiting time than in actual use. Internal timers built into these devices will continue to run while waiting.

1 is a flowchart illustrating a conventional method of performing a time function. First, in conventional portable devices, the generation of the interrupt signal of the internal timer usually occurs in seconds. When the clock interrupt is generated (100), the second (SECOND) data is increased by one (110), when the second data reaches 60 (120), the second unit data is initialized (130), and the minute (MINITE) data is increased by one (140). ). Next, seconds and minutes are displayed on the screen using the data (150). As described above, power is unnecessarily consumed by performing the time function in units of seconds. Although low power consumption, it is important for portable small devices.

Accordingly, an object of the present invention is to solve the above-mentioned problem, in a portable device having a relatively long operation waiting time than the operation time, the normal time unit of time function or the time unit of minute function according to the setting state of the switching signal The present invention provides an apparatus and a method for performing a time function that can minimize power consumption by selecting.

Time function performing apparatus for achieving the above object of the present invention includes a ROM for storing the operation program; A clock counter that performs counting according to a pulse signal in seconds and generates a clock interrupt in seconds or minutes according to a state of a switching signal; And a central processing unit that executes an operation program stored in the ROM and performs a time function according to a second or minute clock interrupt from the clock counter.

In addition, the method for performing a time function may include: setting a switching flag in an on / off state; Performing a time function in seconds when the switching flag is in an on state; And performing a minute time function when the switching flag is in an off state.

According to the apparatus for performing a time function and the method described above, power consumption can be reduced by minimizing unnecessary operation.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram illustrating a device for performing a time function according to the present invention, in which reference numeral 1 denotes a central control unit (CPU), 3 denotes a clock counter, 5 denotes a timer, and 7 denotes a ROM (9), RAM (RAM), and 11 are key input controls.

The central control unit 1 executes an operation program stored in the ROM 7 and plays a role of controlling the entire block. Perform the time routine according to the clock interrupt. For example, when a user wants to perform a preset function such as an automatic power-on function according to a preset reservation time, the corresponding time routine is performed.

The clock counter 3 is counted in synchronization with a clock signal of one second unit, and the operation is reset according to the switching signal SW and the reset signal RESET. The clock counter 3 is reset in one second unit according to the state of the switching signal SW. Alternatively, it generates a clock interrupt signal in 1 minute increments. If the switching signal SW is in the ON state, a clock interrupt in seconds is generated, and in the OFF state, a clock interrupt in a minute is generated.

The timer 5 generates a clock signal in units of 1 second.

The ROM 7 stores an operation program, and a time routine is executed according to the operation program. The RAM 9 refers to a memory for storing data generated while executing an operation program.

The key input control unit 11 controls key input from various input devices (for example, button type, keyboard type, and switch type) attached on the portable device.

The operation according to the above configuration will be described with reference to FIGS. 2 through 4.

In FIG. 3, when a clock interrupt is generated by the clock counter 3 (300), it is determined whether the signal of the switching signal SW is in an ON / OFF state (302). If the switching signal SW is in the ON state, the second data is increased by one (304), if the second data is 60, the minute data is increased by one (308), and the second data is initialized to zero (310). If the second data is less than 60, the time is displayed on the screen based on the current minute data and the second data (312). On the other hand, if the switching signal SW is OFF, the minute data is increased by one (320). If the minute data is 60, the time data is increased by one and the minute data is initialized to zero (324). Then, the time routine is performed (326).

4 is a flowchart illustrating a time routine when the switching signal SW transitions from the OFF state to the ON state.

When the switching signal SW transitions from the OFF state to the ON state (410), the current second data is replaced by the sum of the past second data and the counter value, and the counter value is initialized to zero (420). Subsequently, if the current seconds data exceeds 60 (430), the minutes data is increased by 1 (440) and 60 is subtracted from the 0 seconds data (450). If the current second data is less than 60, the current time is displayed on the screen based on the minute and second data (460).

In summary, when the switching signal SW input to the clock counter 3 is in an ON state, a clock interrupt in seconds is generated to have a normal clock function. In the OFF state, a clock in minutes instead of seconds is controlled. Generate an interrupt. In portable devices, which have a much longer operation waiting time than the operating time, this can reduce power consumption by minimizing unnecessary operation by performing a time routine of a minute instead of a short time routine of a second when waiting. Will be.

As described above, in the portable devices having a much longer waiting time than the operating time, the power consumption can be reduced by minimizing unnecessary operations by performing a minute time routine when the waiting time is performed.

Claims (2)

A time function performing apparatus provided in a portable device to perform a time function, the apparatus comprising: a ROM for storing an operation program; A clock counter that performs counting according to a pulse signal in seconds and selectively generates a clock interrupt in seconds or minutes according to a state of a switching signal; A central processing unit that executes an operating program stored in the ROM and performs a time function according to a second or minute clock interrupt from the clock counter, and when the portable device is in operation, the clock counter And generating a clock interrupt and generating a clock interrupt in a minute when the operation is in a standby state. A time function performing method for performing a time function in a portable device, the method comprising: setting a switching flag to an on / off state; Performing a time function in seconds when the switching flag is in an on state; And performing a minute time function when the switching flag is in an off state. The performing of the second time function includes: a small process of incrementing one second data by one second when a clock interrupt of a second occurs; If the data is 60, the minute data is incremented by one and the second data is initialized. The process of performing the minute time function includes: a minute process of incrementing the minute data by one when a clock interrupt of the minute is generated; And if the minute data is 60, increasing the time data by 1 and initializing the minute data.