KR100628755B1 - A mobile communication terminal having a function to change the main CPU clock and the method thereof - Google Patents

Abstract

The present invention relates to the clock control of the main processor of the mobile communication terminal, and more particularly, a mobile communication terminal having a main processor clock variable function for outputting the variable of the clock of the main processor according to the system driving state of the mobile communication terminal and the A main processor clock variable method.

A mobile communication terminal having a main processor clock variable function of the present invention as described above has a reference clock generating unit for providing a reference clock to a control unit, the control unit being provided on one side of the control unit to sense the driving of the control unit And a clock control unit for varying the reference clock input from the reference clock generator after receiving the detection signal from the driving detection unit and outputting the same to the control unit.

Mobile terminal, processor, MSM, reference clock, reference clock variable

Description

A mobile communication terminal having a main processor clock variable function and a clock variable method of the main processor {A mobile communication terminal having a function to change the main CPU clock and the method}

1 is a block diagram of a mobile communication terminal in the prior art,

2 is a block diagram of a mobile communication terminal having a clock control unit according to the present invention;

3 is a block diagram of a clock control unit of FIG. 2 according to an embodiment of the present invention;

4 is a flow chart showing the process of the present invention.

* Description of Major Symbols in Drawings *

1, 10: MSM 2, 20: reference clock generator

3, 30: oscillator 4, 40: RF transmitter

5, 50: RF receiver 6, 60: duplexer

100: clock control unit

110: controller 120: divider

130: multiplier

The present invention relates to the clock control of the main processor of the mobile communication terminal, and more particularly, a mobile communication terminal having a clock variable function of the main processor for varying and outputting the clock of the main processor according to the system operation of the mobile communication terminal and the A main processor clock variable method.

Currently widely used mobile communication terminal should be provided with a reference clock generator for outputting a frequency of a predetermined reference for the up-and-down conversion of the RF signal and the start of the main processor (MSM). 1 is a block diagram of a mobile communication terminal of the related art having a reference clock generator as described above.

As shown in FIG. 1, the mobile communication terminal of the prior art includes an MSM (1) and a MSM (1) having various digital signal processing units (DSPs) configured in one chip form for driving mobile communication signal processing and application programs. RF transmitter (4) and RF receiver (5) for performing RF signal processing on the transmitted and received data signal output from the) and the duplexer (6) selectively switched according to the transmission and reception of the RF signal (6) ) Is provided, and generates and supplies a reference clock for oscillation of the oscillation unit 3 and the driving and oscillation unit 3 of the oscillator 3 for outputting an oscillation signal for frequency up- and down-conversion of the transmitted / received RF signal. It is a general configuration that the reference clock generator 2 is provided. That is, the MSM 1 is driven by a predetermined reference clock generated by the reference clock generator 2 to generate the oscillation frequency for frequency up-down conversion of the RF signal. do.

However, the above-described mobile communication terminal of the prior art has a problem that the main processor always consumes a constant current regardless of the operation of the mobile communication terminal because the reference clock provided to the main processor is fixed.

Accordingly, the present invention is to solve the above-mentioned problems in the prior art, it is possible to vary the reference clock provided to the main processor in accordance with the operation of the mobile communication terminal by reducing the current consumption by the main processor mobile communication An object of the present invention is to provide a mobile communication terminal having a clock variable function of a main processor and a clock variable method of the main processor, which can prolong the battery life of the terminal.

A mobile communication terminal of the present invention for achieving the above object, in the mobile communication terminal having a reference clock generating unit for providing a reference clock to the control unit, provided on one side of the control unit for detecting and outputting the drive of the control unit And a driving controller and a clock controller for varying the reference clock input from the reference clock generator after outputting the detection signal output from the controller driving detector.

The clock controller may include a divider for dividing the reference clock, a multiplier for increasing the reference clock, and a controller for controlling frequency division and multiplication of the divider and the multiplier.

In the above configuration, the control unit driver detecting unit detects a software driving signal from the control unit and inputs driving information of the control unit to the controller of the clock control unit. The controller is applied to the control unit by applying a reference clock to the divider or multiplier according to the input signal. The reference clock is varied.

The above-described controller controls the variation of the reference clock by outputting a control signal for varying the reference clock according to the standby state, driving state and moving image output state of the mobile communication terminal to the divider and multiplier. The controller described above may be configured to control the divider and multiplier to generate a reference clock suitable for driving software or DSP driven in the control unit of the mobile communication terminal.

The above-described main processor clock variable method of the mobile communication terminal of the present invention includes a system monitoring process for monitoring the driving of the control unit after power is applied to the mobile communication terminal, and a drive for determining the driving state of the control unit after the system monitoring process. And a reference clock variable process of varying the reference clock input to the controller according to the state determination process and the state information determined in the driving state determination process.

The main processor clock variable method of the mobile communication terminal according to the present invention includes a driving state changing determination step of determining whether the driving state of the control unit has been changed after the reference clock changing process, and the control unit in the driving state changing decision process. If there is a change in the driving state of the drive state determination process is performed again, and if there is no change in the drive state of the control unit, the standby state determination process for determining whether the mobile communication terminal is not in a standby state, If it is determined that the standby state in the standby state determination process, characterized in that it further comprises a standby mode clock output process for changing the reference clock to the reference clock of the standby state.

The driving state of the controller determined in the driving state determination process described above may be classified into a standby state, an operating state, and a high-speed data processing state, wherein the standby state is a state in which the mobile communication terminal is not used while the power is turned on. The operation state may be a state such as a voice call state and an output of a text message, and the high speed data processing state may be designated as a driving state requiring high speed data processing such as a video output. Alternatively, the driving state of the controller determined in the above-described driving state determination process may be to determine the highest clock frequency required for the operation of the software or the digital signal processing units driven by the controller.

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

2 is a block diagram of a mobile communication terminal according to an embodiment of the present invention.

As shown in FIG. 2, the mobile communication terminal of the present invention includes an MSM 10 including various digital signal processing units (DSPs) for driving a modem and an application program for mobile communication signal processing in the form of a single chip; RF transmitter 40 for performing RF signal processing on the transmitted / received data signal output from MSM 10 and RF receiver 50 and duplexer 60 which is selectively switched according to the transmission and reception of RF signals to transmit and receive RF signals. ) Is provided, the reference for the oscillation unit 30 and the oscillation unit 30 and the oscillator 30 and the oscillator 30 for outputting the oscillation signal for the frequency up and down conversion of the RF transmitter 40 and RF receiver 50 A reference clock generator 20 is provided to generate and supply a clock. The reference clock generator 20 receives a reference clock from the reference clock generator 20 between the MSM 10 and the reference clock generator 20 to the MSM 10. The clock controller 100 is provided to output the clock controller 10. Between the 0) and the MSM 10, the MSM drive detection unit 200 is provided to detect the information of the software or DSP driven from the MSM 10, and then apply to the clock control unit 100.

FIG. 3 is a block diagram illustrating an embodiment of a configuration of the clock controller 100 in the configuration of the mobile communication terminal of FIG. 2.

As shown in FIG. 3, the clock controller 100 divides the controller 110 and the controller 110 that receive software information driven in the MSM 10 applied from the MSM drive detection unit 200. The frequency divider 120 divides the reference clock according to the rate, and the multiplier 130 multiplies the reference clock according to the multiplication rate output from the controller 110.

The above-described divider 120 may be configured such that a multistage divider circuit (not shown) having a predetermined divider ratio is connected in series, and each divider circuit has a reference clock input terminal connected to a switch. Here, the frequency division circuit may be a feedback frequency division circuit or a frequency division circuit using a digital IC.

The multiplier 130 described above also has a multiplier circuit (not shown in the figure) having a predetermined multiply ratio and is arranged in multiple stages, and each multiplier circuit has a reference clock input stage having a switch switched to select a reference clock input. Can be configured. Here, the multiplication circuit may be an oscillation circuit composed of a PLL and an oscillation element.

The above-described divider and multiplier is divided into standby states, operating states, and high-speed signal processing according to a standby state in which a mobile phone is turned on, a voice call state, and a state requiring high-speed data processing such as a video. It is preferred to be configured to generate a reference clock or to generate a reference clock suitable for the driving clock of the software or DSP that requires the largest clock among the software or DSP running on the MSM 10.

In addition, the controller 110 receives the operating frequency range information of the DSP or software driven in the MSM from the MSM driving detection unit 200 and then switches configured at an input terminal of a specific frequency division or multiplication circuit that generates the corresponding operating frequency. Turn on so that the reference clock is input to the division or multiplication circuit.

The clock control unit and the MSM driver are mounted on the mobile communication terminal in the form of hardware or software.

4 is a flowchart showing a process of a method of varying a reference clock applied to the MSM 10 in a mobile communication terminal having the above-described configuration. Hereinafter, an operation process of varying the reference clock applied to the MSM 10 in the mobile communication terminal having the configuration of FIGS. 2 to 3 and the method of the present invention will be described.

As shown in FIG. 4, when power is supplied to the mobile communication terminal, the MSM driving detection unit 200 monitors a system, that is, a software or a DSP operating in the MSM 10 (S10: system monitoring process).

In the system monitoring process of S10, when the MSM driving detection unit 200 detects software or DSP operated in the MSM 10, the MSM driving detection unit 200 determines whether it is in a standby state, an operating state, a high speed data processing state, or is driven or The highest clock required for the operation of the DSP is determined (S20: driving state determination process).

When the driving state is determined in the driving state determination process of S20, the MSM driving detection unit 200 outputs the clock control information according to the driving state to the controller 110 of the clock control unit 100 (S30: clock control signal output process). .

The controller 110 of the clock control unit 100 that receives the clock control signal by the clock control signal output process of S30 divides the divider 120 or the multiplier for the reference clock input of the divider 120 or the multiplier 130. The specific switch configured in 130 is turned on to output the variable reference clock from the clock controller 100 (S40: reference clock variable output process).

Thereafter, the MSM driving detection unit 200 again monitors the driving state of the MSM 10 to determine whether there is a change in the driving state (S50: driving state change determination process).

If there is a change in driving state in the driving state change determination process of S50, the process moves to the driving state determination process of S20 to perform the processing again, and if there is no change in the driving state, the MSM driving detection unit 200 performs software or DSP. After the operation of the terminal is terminated, the mobile communication terminal determines whether the idle state is not used (S60: Standby state determination process)

If there is a software or DSP drive in the standby state determination process of S60, the process shifts to the operation state change determination process of S50 to perform the process again, and when the mobile communication terminal is in the standby state, the MSM drive detection unit 200 clocks. Outputs a clock control signal for outputting a clock in the standby state to the controller of the controller 100, changes the reference clock to output a clock having a frequency set to the standby state, and ends the process (S70: standby mode). Clock output stage).

 According to the present invention described above, by varying the reference clock input to the MSM (processor) according to the usage state of the mobile communication terminal, it is possible to reduce the power consumption of the processor, thereby extending the use time of the battery To provide.

Claims (11)

In the mobile communication terminal having a reference clock generator for providing a reference clock to the control unit, A controller driving detection unit provided at one side of the controller to detect driving of the controller according to a standby state, an operating state, and a high speed data processing state of the mobile communication terminal and output a driving state signal of the controller; And a clock control unit configured to vary the reference clock input from the reference clock generator and output the control signal to the controller after receiving the detection signal output from the controller driving detection unit. Mobile communication terminal. The clock driver of claim 1, wherein the control unit driver detecting unit detects the highest clock frequency signal among clock frequencies for driving the digital signal processor and converts the detected clock frequency signal for driving the digital signal processor to the clock control unit. A mobile communication terminal having a clock varying function of a main processor, characterized in that applied. delete The method of claim 1, wherein the clock control unit, A multiplier that receives and multiplies the reference clock from the reference clock generator; And a controller for controlling a variable of a reference clock by controlling the frequency division ratio or multiplication ratio of the divider or the multiplier. The multiplier circuit of claim 4, wherein the multiplier circuit having a predetermined multiplication ratio is arranged in multiple stages, and each input terminal of the multiplier circuit is provided with a switch switched by the controller for inputting a reference clock. A mobile communication terminal having a clock changing function of a main processor. The method of claim 1, wherein the clock control unit, A divider for dispensing the reference clock from the reference clock generator; A multiplier that receives and multiplies the reference clock from the reference clock generator; And a controller for controlling a variable of a reference clock by controlling the frequency division ratio or multiplication ratio of the divider or the multiplier. The frequency divider of claim 6, wherein a frequency divider circuit having a predetermined frequency division rate is connected in series, and each input terminal of the frequency divider circuit includes a switch switched by the controller for inputting a reference clock. A mobile communication terminal having a clock changing function of a main processor. A system monitoring process for monitoring the operation of the controller after power is supplied to the mobile communication terminal; A driving state determining process of determining whether the driving state of the controller is a standby state, an operating state, or a high speed data processing state after the system monitoring process; And a reference clock variable process of varying a reference clock input to the controller according to the state information determined in the driving state determination process. According to claim 8, After the reference clock variable process, A driving state change determination process for determining whether the driving state of the controller is changed; A standby state determination process of performing a driving state determination process when the driving state of the controller is changed in the driving state change determination process, and determining a standby state when there is no change of the driving state of the controller; And a standby mode clock output process of varying the reference clock to a reference clock in a standby state when it is determined that the standby state is determined in the standby state determination process. delete 10. The method of claim 8 or 9, wherein the driving state of the controller is maximum driving clock information of a software or a digital signal processor operating in the controller. .

Images