JP2010123254A - Electronic device and system activation method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To play music by an input operation while a main control unit is not activated for the purpose of saving power. <P>SOLUTION: The electronic device includes a main control unit activated by receiving power to operate a system, a music playing part for playing music by receiving a play command, a sub-control unit for detecting an input to the music playing part, and a power source part for supplying power to the sub-control unit when energized, and power to the main control unit when instructed by the sub-control unit. The sub-control unit is activated by receiving power supplied from the power source part, determines the power state of the main control unit when an input for music playing is detected, and transmits the play command to the music playing part in a state where power supply to the main control unit is stopped. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic device such as a video disc player or a DVD-ROM playback device and a system activation method thereof.

Conventionally, personal computer application products require a considerable amount of time from turning on the power to being used by the user, along with an increase in the size of basic software due to high performance and multi-functionality. This time includes hardware initialization processing and operation diagnosis processing.
In the personal computer, basic software including initialization processing and operation diagnosis is executed when the main body is energized by the power key, and always operates under the control of the main body CPU.

  On the other hand, in recent years, basic software including initialization processing and operation diagnosis has been executed even at home appliances such as video disc players and DVD (Digital Video Disc) playback devices. It always operates under the control of the main body CPU, and has come to operate almost the same as a personal computer.

  By the way, there is a common sense that it takes a long time for the OS to start up in a personal computer, but for home appliances, the personal computer does not understand as much as the personal computer, and the system startup time until the function can be used is as long as it is. There is a demand for speed.

  For this reason, a suspend (sleep) process, which is a technique often used in personal computers, may be performed. This suspend (sleep) process is a technique for holding the memory state while the system is activated when the power is turned off. In addition, there is a hibernation process in which the operation state of the system is stored in the external storage device as it is, and the main storage device is returned to the operation state when the power is turned on.

  In the suspended state in the case of a personal computer, since the power of the main body is always on, it is possible to execute a predetermined function after returning from the suspended state to the normal state by key input or interruption. For example, tray opening for opening a CD-ROM drive tray, CD audio playback, mail processing by incoming modem, automatic download by a timer, and the like.

  However, when considering home appliances based on the interior of a personal computer, there is a problem that the user may be suspicious of a malfunction if it takes a long time to start using after the main unit is turned off. .

  In addition, it is necessary to manage the state of each device with basic software, and control of the system operating state tends to be complicated. For home appliances such as DVD players, complicated control like a personal computer is required. There was a problem that could not be done.

  Furthermore, there is a problem that the system configuration is restricted, for example, a device used in the apparatus needs to have a power saving mode.

  The present invention has been made to solve such a problem, and an electronic device capable of playing music by an input operation when the main control unit is not activated for power saving and a system activation method thereof It is intended to provide.

  In order to achieve the above-described object, an electronic device according to the present invention includes a main control unit that is activated by power supply to operate the system, a music playback unit that plays back music by inputting a playback command, and an input to the music playback unit. A sub-control unit that detects power and a power supply unit that supplies power to the sub-control unit when energized, and supplies power to the main control unit according to an instruction from the sub-control unit. The unit is activated by power supply from the power unit, and when an input for music playback is detected, determines the power state of the main control unit, and power supply to the main control unit is stopped. In the case of the status, the playback command is sent to the music playback unit.

  An electronic device system activation method according to the present invention includes a main control unit that is activated by power supply to operate the system, a music reproduction unit that reproduces music by inputting a reproduction command, and an input to the music reproduction unit. In a system activation method for an electronic apparatus comprising a sub-control unit and a power source unit that supplies power to the main control unit according to an instruction from the sub-control unit, the power source unit is supplied to the sub-control unit when energized. When the sub-control unit activated by supplying power and detecting power input detects an input for music playback, the power state of the main control unit is determined and the power supply to the main control unit is stopped. In the state, the playback command is sent to the music playback unit so as to play back music.

  According to the present invention, music can be played by an input operation when the main control unit is not activated for power saving.

The block diagram which shows the structure of the DVD-ROM reproducing | regenerating apparatus of one Embodiment of this invention. The flowchart when the submicrocomputer of the auxiliary | assistant part of the DVD-ROM reproducing | regenerating apparatus of this embodiment is initialized by energization and will be in a standby state. The flowchart of the process which the submicrocomputer of an auxiliary | assistant part performs when the power key of the DVD-ROM reproducing | regenerating apparatus of this embodiment is pressed down. The flowchart of the process which the submicrocomputer of an auxiliary | assistant part performs when the tray key of ROM-DRIVE of the DVD-ROM reproducing | regenerating apparatus of this embodiment is pressed down. The flowchart by which the submicrocomputer of an auxiliary | assistant part processes the command requested | required from the main-body part of the DVD-ROM reproducing | regenerating apparatus of this embodiment. The flowchart of the initialization process performed at the time of power activation of the main-body part of the DVD-ROM reproducing | regenerating apparatus of this embodiment. The flowchart at the time of key input generation | occurrence | production in the main-body part of the DVD-ROM reproducing | regenerating apparatus of this embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a personal computer application device, for example, a DVD-ROM playback device, of one embodiment of an electronic device according to the present invention.

  As shown in the figure, the DVD-ROM playback device of this embodiment has a main body 101, an auxiliary unit 102, a power supply unit 103, a ROM-DRIVE 104, and a display device 105. Further, the main unit 101 includes a CPU 111 as a main control unit, a main storage device 112, a start time determination device 113, a start factor determination device 114, a start count determination device 115, an initial diagnosis device 116, a communication device 117, and an input control device 118. , An initialization device 119, a ROM-DRIVE control device 120, and an output control device 121. The auxiliary unit 102 includes a sub-microcomputer (hereinafter abbreviated as sub-microcomputer) 121, a timer 122, a panel key 123, a remote controller (hereinafter abbreviated as “remote control”) 124, and a panel LED 125 as sub-control units.

  The CPU 111 controls each part of the main body 101 based on a predetermined control program. The predetermined control program causes the initial diagnosis device 116 to execute a detailed diagnosis process including an initialization process for controlling each part of the device by the first power supply from the power supply unit 103, and operates each part of the device under its own control. 1 and the first activation process, when the standby operation of the auxiliary unit 102 or the no-operation state for a predetermined time or more occurs during the operation of each part of the device, the device is kept operable. The process of controlling the power to the minimum power usage state to be obtained, that is, the standby state, and in the standby state, when the standby unit is canceled by the auxiliary unit 102, the simple diagnosis process without the initialization process is initialized. A second activation process for operating each part of the device is executed by causing the diagnostic device 116 to execute the second activation process. The main storage device 112 executes programs and stores the results. The activation time determination device 113 determines whether or not the CPU 111 of the main unit 101 has successfully communicated with the sub-microcomputer 121 within a predetermined time from the information obtained through communication with the auxiliary unit 102, that is, the CPU 111 sends a predetermined value to the sub-microcomputer 121. A communication request is issued within the time, and it is determined whether or not the response is returned from the sub-microcomputer 121. The activation factor determination device 114 determines what is the power-on factor, that is, what is the factor that the main body 101 is activated, from the information obtained by communication with the sub-microcomputer 121 of the auxiliary unit 102. The activation number determination device 115 determines whether or not the power is turned on for the first time after being energized, that is, whether or not the activation is the first activation after being energized by an outlet, based on information obtained through communication with the auxiliary unit 102. . The initial diagnosis device 116 performs an operation test of various hardware of the main body unit 101 and diagnoses whether or not the main body unit 101 operates normally.

  The communication device 117 communicates power-on factors and key data between the CPU 111 of the main unit 101 and the sub-microcomputer 121 of the auxiliary unit 102. The input control device 118 processes a key input interrupt from the sub-microcomputer 121. The initialization device 119 initializes various hardware of the main body unit 101. The ROM-DRIVE control device 120 instructs the main body unit 101 to open and close the tray of the ROM-DRIVE 104 and to extract data from the ROM disk. The output control device 121 controls video output to an external display device 105 such as a monitor or a liquid crystal display.

  The sub-microcomputer 121 controls the panel key 123, the input by the remote controller 124, and the output of display data to the panel LED 125, and controls the power on / off of the main body 101 and the tray opening / closing of the ROM-DRIVE 104. The timer 122 measures and manages the activation time after the main body 101 is energized. The panel key 123 is an input device including a power key, a playback key, a fast forward key, a fast reverse key, and the like. The remote control 124 is used when a user performs a remote control operation. The panel LED 125 is a liquid crystal display panel that displays a track, time, error, and the like. The panel key 123, remote controller 124, panel LED 125, ROM-DRIVE 104 tray, and the like of the auxiliary unit 102 are user interface units.

  The power supply unit 103 supplies power to the sub-microcomputer 121 of the auxiliary unit 102 when energized to its own outlet, and supplies power to the main body unit 101 by control (instruction) from the sub-microcomputer 121. The ROM-DRIVE 104 is a drive device that drives a ROM disk such as a DVD-ROM or CD-ROM, and has various keys such as a tray opening / closing key (hereinafter referred to as a tray key) and a power key for instructing opening / closing of the tray. In response to various key operations, data is taken out from the ROM disk and played back under the control of the ROM-DRIVE control device 120 of the main body 101. The display device 105 is an external display device, such as a monitor, connected to the main body unit 101 with a pin code or the like, and displays a video signal output based on the control of the output control device 121 on a display screen.

  In the case of this DVD-ROM playback device, sub inputs for performing key input control using the panel key 123, output control of display signals to the panel LED 125, power ON / OFF control of the main unit 101, tray opening / closing control of the ROM-DRIVE 104, and the like. A microcomputer 121 and a communication device 117 that communicates key inputs and various types of information are provided between the sub-microcomputer 121 and the CPU 111 of the main body 101, and control which of the sub-microcomputer 121 and the main body 101 processes key input. In the standby state in which power is not supplied to the main unit 101 and the CPU 111 of the main unit 101 cannot process information by setting the flag for the storage in the sub-microcomputer 121, the sub-microcomputer on the auxiliary unit 102 side 121 controls key input and display, and the auxiliary unit 102 is controlled by this control. Hardware sub microcomputer 121 the power unit 113 to supply power to the CPU 111 of the body 101 is controlled during operation, to start the CPU 111 by supplying power from the power supply unit 113 to the CPU 111. When the activated CPU 111 communicates with the sub-microcomputer 121, the sub-microcomputer 121 takes over control of the CPU 111, and thereafter, the CPU 111 executes hardware control and display processing according to key input.

  Further, in the above configuration, the initialization device 119 for initializing the main body 101, the initial diagnosis device 116 for diagnosing that the main body 101 operates normally, and the power factor that the main body 101 is activated By providing the activation factor determination device 114 for determining whether or not the initial diagnosis contents are changed according to the power-on factor.

  Also, in the above-described configuration, an initialization device 119 for initializing the main body 101, an initial diagnosis device 116 for diagnosing that the main body 101 operates normally, and whether or not it is the first activation after energization And a start count determination device 115 that determines whether the start is the first start after the energization by the outlet, thereby changing the first start and the initial diagnosis contents for the second and subsequent times.

  In addition, in the above configuration, a timer 122 that manages the time since the main unit 101 is energized, a startup time determination device 113 that determines whether the startup time is within a predetermined time, and a panel that displays a startup error By providing the LED 125, the sub-microcomputer 121 displays an error on the panel LED 125 when a start-up error of the main body 101 occurs.

  The operation of the DVD-ROM playback device of this embodiment will be described below with reference to the flowcharts of FIGS. FIG. 2 is a flowchart when the sub-microcomputer 121 of the auxiliary unit 102 is initialized by energization and enters a standby state. When the outlet of the connection cord provided in the power supply unit 113 is connected to the commercial power supply 100V or the like, the power stepped down and stabilized by the power supply unit 113, for example, 5V or the like, regardless of the state of the power switch of the panel key 123 12V or the like is supplied to the sub-microcomputer 121 of the auxiliary unit 102.

  Then, the sub-microcomputer 121 executes its own initialization process (S201), and then initializes various flags used for determining its own state, that is, a power supply flag, a startup flag, and a control flag (S202). .

  After completion of initialization, the sub-microcomputer 121 checks whether or not there is a key input from the panel key 123 (S203).

  If there is a key input (Y in S203), the sub-microcomputer 121 saves the input key data (S204).

  Subsequently, the sub-microcomputer 121 checks the control flag and determines which of the auxiliary unit 102 and the main body unit 101 processes the key (S205).

  For example, if the control flag is 2 (Y in S205), the sub-microcomputer 121 generates an interrupt and notifies the main unit 101 of the key input (S206).

  If the control flag is 0 or 1 (N in S205), the sub-microcomputer 121 performs a process corresponding to the key input by itself.

  In this case, the sub-microcomputer 121 first determines whether or not the key input is a power key (S207).

  If it is determined that the key is a power key (Y in S207), the sub-microcomputer 121 performs processing of the power key in the auxiliary unit 102 (S208). The detailed process of step S208 will be described with reference to the flowchart of FIG.

  If the key input is not a power key (N in S207), the sub-microcomputer 121 then determines whether the key input is a tray key of the ROM-DRIVE 104 (S209).

  If it is determined that the key is a tray key, the sub-microcomputer 121 performs a tray key process (S210). The detailed process in step S210 will be described with reference to the flowchart of FIG.

  If the key is not the above, that is, if it is a key that does not need to be processed during standby, the sub-microcomputer 121 returns to the key input check process in step S203.

  If there is no key input as a result of the key input check (N in S211), the sub-microcomputer 121 checks the power supply flag to determine whether the system is in the standby state or the activated state (S211).

  If the power flag is not 1 (N in S211), the sub-microcomputer 121 returns to the process of S203, that is, waiting for key input in the standby state.

  If the power flag is 1 (Y in S211), the sub-microcomputer 121 checks the control flag (S212). If the control flag is 1 (Y in S212), the system (CPU 111 of the main body 101) It is determined that the timer is activated, the timer is activated, and the timer 122 is timed out.

  Then, before the timer 122 times out, it is determined whether or not there is an access from the CPU 111 to the sub-microcomputer 121, that is, whether or not a communication request command arrives (S213).

  If there is no access from the CPU 111 of the main unit 101 within a certain time and the timer 122 times out (Y in S213), the sub-microcomputer 121 displays “error” on the panel LED 125 as a start failure.

  On the other hand, if a command is delivered from the CPU 111 of the main unit 101 to the sub-microcomputer 121 before the timer 122 times out (Y in S215), the sub-microcomputer 121 performs processing according to each received command. The detailed process of step S216 will be described with reference to the flowchart of FIG. FIG. 3 is a flowchart of processing performed by the sub-microcomputer 121 of the auxiliary unit 102 when the power key is pressed.

  In this case, the sub-microcomputer 121 first checks the power supply flag to determine whether the system is in a standby state or an activated state (S301).

  For example, if the power flag is 0 (Y in S301), the power is turned on for the main unit 101 because it is in the standby state (S302).

  Then, the sub-microcomputer 121 changes the power supply flag indicating that the main unit 101 is in the activated state from 0 (standby state) to 1 (activated state) (S303). After changing the power flag to 1, the sub-microcomputer 121 sets that the power key is on as a power-on factor (S304).

  Then, the sub-microcomputer 121 sets the control flag to 1 (S304), and starts an activation timer to monitor whether the main body 101 is activated within a predetermined time (S306).

  In the determination process of S301, if the power flag is not 0 (N in S301), for example, 1 or the like, the sub-microcomputer 121 executes the power-off process of the main body 101 (S307).

  After the power-off process, the sub-microcomputer 121 sets the power flag to 0 (standby state) and the control flag to 0 (initial state) (S308).

  FIG. 4 is a flowchart of processing performed by the sub-microcomputer 121 of the auxiliary unit 102 when the tray key of the ROM-DRIVE 104 is pressed. In this case, the sub-microcomputer 121 first determines whether the system is in a standby state or a startup state (S401).

  If the determination result indicates that the power flag is 0 (standby state) (Y in S401), the sub-microcomputer 121 executes the same processing as S302 to S306 in FIG. 3, that is, the power-on processing of the main body 101 (S402). To S406).

  The sub-microcomputer 121 determines whether the tray of the ROM-DRIVE 104 is open or closed (S407).

  When it is determined that the tray of the ROM-DRIVE 104 is closed (Y in S407), the sub-microcomputer 121 issues a command to open the tray (S408).

  On the other hand, if it is determined that the tray of the ROM-DRIVE 104 is open, the sub-microcomputer 121 issues a command to close the tray (S409).

  FIG. 5 is a flowchart in which the sub-microcomputer 121 of the auxiliary unit 102 processes a command requested from the main unit 101. In this case, the sub-microcomputer 121 first determines whether or not the command requested from the main unit 101 is a start flag set (S501).

  Here, when the activation flag is set (Y in S501), the sub-microcomputer 121 sets the activation flag to 1 (activated: the main unit 101 has been activated after energization of the sub-microcomputer 121 by the outlet) (S502). .

  Subsequently, the sub-microcomputer 121 determines whether the command is a control flag set (S503).

  Here, when the control flag is set (Y in S503), the sub-microcomputer 121 sets the control flag to 2 (a mode in which key input is controlled by the main unit 101) (S504).

  It is determined whether the command is a key data acquisition request (S505).

  Here, in the case of a key data acquisition request (Y in S505), key input data is returned from the sub-microcomputer 121 to the main body 101 (S506).

  The sub-microcomputer 121 determines whether the command is a power-on factor acquisition request (S507).

  Here, in the case of a power-on factor acquisition request (Y in S507), the sub-microcomputer 121 returns power-on factor information to the main unit 101 (S508).

  The sub-microcomputer 121 determines whether the command is a power-off request (S509).

  If the sub-microcomputer 121 is a power-off request (Y in S509), the sub-microcomputer 121 performs power-off processing of the main body 101 (S510).

  After the power-off processing, the sub-microcomputer 121 sets the power flag to 0 (standby state) and the control flag to 0 (mode for controlling key input by the sub-microcomputer 121) (S511).

  Here, an initialization operation (start-up operation) of the CPU 111 performed when the power of the main body 101 is turned on will be described with reference to FIG. FIG. 6 is a flowchart of an initialization process performed when the main unit 101 is turned on.

  As shown in the figure, the CPU 111 performs processing (initialization processing) for initializing each device and various devices on the main body 101 side including itself (S601).

  After the initialization process, the CPU 111 checks the state of the activation flag and determines whether it is the first activation (S602).

  If the activation flag is not 1 as a result of the activation flag check (N in S602), the initial diagnosis process of the device of the main body 101 is performed in the detailed mode (S605).

  On the other hand, when the activation flag is 1 (Y in S602), the CPU 111 issues a communication request to the sub-microcomputer 121 of the auxiliary unit 102, and acquires power-on factor information as a response from the sub-microcomputer 121 (S603).

  Upon receiving the response from the sub-microcomputer 121, the CPU 111 determines whether the power-on factor is the power key or the ROM-DRIVE 104 tray key (S604, S606).

  In the case of either the power key or the tray key (Y in S604, Y in S606), the CPU 111 performs the initial diagnosis process of the device of the main body 101 in the simple mode (simple initialization diagnosis process) (S607).

  If neither the power key nor the tray key (N in S606), the CPU 111 requests the sub-microcomputer 121 to set a start flag to indicate that the main unit 101 has been started (S608). Processing initialization is performed (S609).

  Finally, the CPU 111 requests a control flag set from the sub-microcomputer 121 in order to control key input in the main body 101 (S610).

  Next, the operation of the CPU 111 when a key input occurs will be described with reference to FIG. FIG. 7 is a flowchart showing the operation of the CPU 111 of the main body 101 when a key input is generated. As shown in the figure, the CPU 111 performs an interrupt process for determining whether or not there is a key input (S701).

  When there is a key input (Y in S701), the CPU 111 issues a key data acquisition request to the sub-microcomputer 121 (S702).

  It is determined whether the key data is a tray key, a power key, or another key (S703, S704, S705).

  If the key data is, for example, a tray key (Y in S703), the CPU 111 determines whether the ROM-DRIVE 104 tray is open (S706). Here, the CPU 111 determines that the ROM-DRIVE 104 tray is closed. In the case (N in S706), the CPU 111 issues a command for opening the tray (S708).

  If the CPU 111 determines that the ROM-DRIVE 104 tray is open (Y in S706), the CPU 111 issues a command to close the tray (S708).

  On the other hand, if the key data is, for example, a power key (Y in S704), the CPU 111 executes a process for terminating the system of the main body 101 (system termination process) (S709), A power supply stop request (power cutoff request) is issued to the main body 101 side (S710).

  If the key data is another key (Y in S705), the CPU 111 performs a process corresponding to each key (S711).

  Next, the operation for each occurrence event in the DVD-ROM playback device of this embodiment will be described. In the case of this DVD-ROM playback device, the sub-microcomputer 121 of the auxiliary unit 102 is energized when the outlet from the power source unit 103 is connected to a commercial power source or the like.

  When the sub-microcomputer 121 is energized, the sub-microcomputer 121 performs initialization for operating itself (S201).

  Next, various flags used for determining the activation state are initialized (S202).

  The state waits for key input from the panel key 123 (S203).

  Here, for example, when the power key is pressed, the key data indicating the power key is saved (S204).

  Next, the sub-microcomputer 121 checks the state of the control flag (S205). When power is supplied for the first time, since the control flag is 0 (standby state), the sub-microcomputer 121 controls each function of the auxiliary unit 102 for key input.

  Since the key input is the power key, the sub-microcomputer 121 proceeds to Y in the determination process of S207 of FIG. 2, and executes the process when the sub-microcomputer 121 presses the power key (S208). Details of the power key processing are shown in FIG.

  When the sub-microcomputer 121 performs the power key process, the sub-microcomputer 121 first checks the power flag to determine the power state of the main body 101 (S301).

  In this case, the power flag is 0 and the power supply to the main body 101 is stopped, that is, the power is cut off, so the power of the main body 101 is turned on (S302). Next, the sub-microcomputer 121 sets the power flag to 1 (the power-on state of the main unit 101) (S303), and stores the key when the power is turned on.

  Next, the sub-microcomputer 121 sets a control flag to 1 (S305), and activates a timer 122 that monitors the activation timeout of the main body 101 at the timing of starting power-on.

  In the main body 101, the CPU 111 executes the startup process of FIG. 6 by power supply from the power supply unit 103 controlled by the sub-microcomputer 121.

  In this case, the CPU 111 checks the activation flag at the time of activation to determine whether it is the first activation by itself or whether the activation is from the state after being activated once and suspended (S602).

  When starting for the first time after energization, since the start flag is 0, the detailed initial diagnosis is executed regardless of the power-on factor (S605).

  After completing the initial diagnosis, the CPU 11 requests the sub-microcomputer 121 to set an activation flag (S608).

  When the sub-microcomputer 121 recognizes a command from the main unit 101 in the process of S215 shown in FIG. 2, the sub-microcomputer 121 sets 1 as the activation flag that indicates that the CPU 11 has been normally activated in the process of S502 of FIG.

  Subsequently, the CPU 111 initializes key input processing (S609), and requests the sub-microcomputer 121 to set a control flag (S610).

  When receiving a control flag setting request from the CPU 111, the sub-microcomputer 121 sets the control flag to 2 (S504 in FIG. 5), and sets the main unit 101 to process the key.

  Further, the sub-microcomputer 121 performs the determination process of S212 in FIG. 2 while waiting for key input in the process of S203 (S212).

  When power is supplied to the main body 101, the control flag becomes 1, and at this timing, the sub-microcomputer 121 operates the timer 122 to check for a timeout (S213).

  Here, if a communication request is not received before the timer 122 times out after a predetermined time has elapsed, the sub-microcomputer 121 hangs up while the CPU 111 itself is being activated or when the CPU 111 is activating each device in the main body 101. It is determined that there has been a fatal error, and a startup error is displayed on the panel LED 125 (S214).

  In this state, when the user presses the power key, the control flag is still 2, so the sub-microcomputer 121 processes the key input. In this case, the sub-microcomputer 121 recognizes the power key (S207), and performs the power key processing of FIG. 3, that is, the power shut-off processing (S307) and the flag reset (S308).

  If the communication request is received before the timer 122 times out, the sub-microcomputer 121 determines that the CPU 111 has started up correctly, and if there is a key input thereafter, the control flag becomes 2 in the process of S205 in FIG. Therefore, the sub-microcomputer 121 is in a through state in which only the main unit 101 side is notified of the key input, and leaves the processing for the key input to the CPU 111.

  Here, the operation of the CPU 111 of the main body will be described with reference to FIG. As shown in the figure, when the CPU 111 of the main unit 101 receives a key input interrupt (Y in S701), the CPU 111 issues a key data acquisition request to the sub-microcomputer 121, and receives the request within a predetermined time. The microcomputer 121 returns the key data to the CPU 111, whereby the CPU 111 obtains the key data.

  Based on the key data obtained from the sub-microcomputer 121, the CPU 111 performs processing for each key data in the following steps.

  For example, if the key data is a power key (Y in S704), a system termination process is performed and in S709, after the power supply of the main unit 101 can be shut off, a power shutdown request is issued to the sub-microcomputer 121 (S710). .

  When the sub-microcomputer 121 receives this power-off request, the sub-microcomputer 121 controls the power supply unit 103 to stop the power supply to the sub-microcomputer 121 of the main body 101 in the power-off process of S510 in FIG. The power supply to the microcomputer 121 is stopped, and both the power flag and the control flag are returned to 0 in the process of S511.

  Thereafter, since the two flags are in the initial state, when a key input occurs, the sub-microcomputer 121 controls the operation of the auxiliary unit 102 itself.

  Next, when the tray key is pressed in a standby state where power is supplied only to the sub-microcomputer 121, the sub-microcomputer 121 recognizes the tray key in the processing of S209 in FIG. 2, and performs the processing when the tray key is pressed in FIG. Execute.

  In this case, when the sub-microcomputer 121 determines that the power of the main body 101 is not turned on in the process of S401, the sub-microcomputer 121 executes the same process as the power-on process of S402 to S406, and then issues a tray open command in the process of S408. Issued to ROM-DRIVE 104 to open the tray.

  When power is supplied from the power supply unit 103 by the process of S402, the CPU 111 of the main body unit 101 starts the following startup process.

  In this case, as shown in FIG. 6, the CPU 111 first initializes the device (S601), and then checks the activation flag.

  As a result of this check, if the activation flag is 1, for example, it is not the first activation, so the CPU 111 issues a communication request to the sub-microcomputer 121 and acquires information on the power-on factor from the sub-microcomputer 121 (S603).

  Subsequently, the CPU 111 determines a power-on factor from the acquired power-on factor information (S604, S606).

  Here, if the power-on factor is, for example, the power key is turned on (Y in S604) or the tray key is turned on (Y in S606), a simple initial diagnosis process is executed in order to shorten the startup time (S607).

  If the tray key is pressed before the control flag is set (S610), the key processing is performed on the sub-microcomputer 121 side, and the tray key processing is performed in the processing of S210 shown in FIG. Therefore, the tray key can be received even when the main body 101 is in the startup process.

  On the other hand, when the tray key is pressed with the control flag already set (Y in S610), the main body 101 side, that is, the CPU 111 performs the processing of the tray key, and the processing of S706 to S708 shown in FIG. Move on.

  As described above, according to the DVD-ROM reproducing apparatus of this embodiment, in the standby state in which only the sub-microcomputer 121 is energized, each function of the auxiliary unit 102 designated by the input operation from the panel key 123 or the like is performed. Therefore, the power supply of the main body 101 can be completely shut off, and the power consumption of the entire system can be suppressed without performing complicated management with basic software and various devices.

  In addition, if any user operation is performed in a standby state in which only the sub-microcomputer 121 is energized, the sub-microcomputer 121 operates the auxiliary unit 102 according to the operation and simultaneously controls the power supply unit 103 to control the main body. Since the power is supplied to the unit 101, that is, the CPU 111, if the key operated by the user is a tray key, for example, the tray is unloaded, the CPU 111 starts the initialization process, and after the initial diagnosis until the normal startup The user can perform an operation such as setting a ROM disk in the pulled-out tray without waiting for the CPU 111 to start up, and the waiting time on the user side can be eliminated.

  Further, since the initial diagnosis device 116 diagnoses whether the main body 101 operates normally and the initial diagnosis content can be changed based on the power-on factor, that is, the initial diagnosis content at the time of starting the main body 101 is activated. By performing initial diagnosis only when necessary, it is possible to provide a personal computer application device that can reduce the startup time.

  In addition, this invention is not limited to the content of said embodiment. As another embodiment, music playback of an audio CD that can be executed simply by sending a command to the drive can be controlled and operated only by the sub-microcomputer 121 of the auxiliary unit 102 without starting the main unit 101.

  DESCRIPTION OF SYMBOLS 101 ... Main-body part, 102 ... Auxiliary part, 103 ... Power supply part, 111 ... CPU, 114 ... Starting factor determination apparatus, 116 ... Initial diagnosis apparatus, 121 ... Sub microcomputer (sub microcomputer), 123 ... Panel key, 125 ... Panel LED.

Claims (2)

A main control unit that is activated by power supply and operates the system;
A music playback unit for playing music by inputting a playback command;
A sub-control unit for detecting an input to the music playback unit;
A power supply unit that supplies power to the sub control unit when energized, and supplies power to the main control unit according to an instruction from the sub control unit;
The sub-control unit
When the power supply from the power supply unit is activated and an input for music playback is detected, the power supply state of the main control unit is determined, and the power supply to the main control unit is stopped In this case, the electronic device transmits the reproduction command to the music reproduction unit. In response to an instruction from the main control unit that starts up by supplying power and operates the system, a music playback unit that plays music by inputting a playback command, a sub-control unit that detects input to the music playback unit, and the sub-control unit In a system activation method of an electronic device comprising a power supply unit that supplies power to the main control unit,
The power supply unit supplies power to the sub-control unit when energized,
When the sub-control unit activated by power supply detects an input for music playback, the power-supply state of the main control unit is determined and power supply to the main control unit is stopped A system activation method for an electronic device, wherein the playback command is sent to the music playback unit so as to perform music playback.

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