Electronic device and method for controlling electronic device

Abstract

Reduce power consumption in sleep state. An electronic device switches between an operating state and a sleep state, and includes a controller that, when the electronic device is in the operating state, executes polling to periodically check the state of a battery, and, when the electronic device is in the sleep state, controls the execution of the polling based on a notification signal output from the battery.

Description

[Technical field]

[0001] The present invention relates to an electronic device and a method for controlling an electronic device. [Background technology]

[0002] One of the standards for computer power management is ACPI (Advanced Configuration and Power Interface) (see, for example, Patent Document 1). ACPI defines the power states (S0 to S5) of devices. General power states defined by ACPI are as follows: In S0, the computer is in operation, and in S1 and S2, the computer is in standby. In S3, the computer is in sleep (standby) state, and in S4, the computer is in hibernation state. In S5, the computer is shut down. Also, a function called modern standby (hereinafter referred to as ModS) or S0i3 may be implemented in the computer as a sleep state.

[0003] A computer includes a battery. The computer needs to monitor the battery status to check the remaining battery power, etc. (see, for example, Patent Document 2). One method for monitoring the battery status is called polling. In this method, an embedded controller or a CPU (Central Processing Unit) periodically communicates with the battery to monitor the battery status. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-047293 A [Patent Document 2] JP 2023-067854 A Summary of the Invention [Problem to be solved by the invention]

[0005] When the computer is in a sleep state, the embedded controller or CPU can stop functioning, but the embedded controller or CPU must wake up periodically to perform polling, which increases power consumption in the sleep state.

[0006] An object of the present invention is to provide an electronic device and a method for controlling an electronic device that can reduce power consumption in a sleep state. [Means for solving the problem]

[0007] One aspect of the present invention is an electronic device that switches between an operating state and a sleep state, A battery and a controller, When the electronic device is in the operating state, The controller: performing periodic polling to determine the status of the battery; the battery outputs a notification signal in a first state to start up the controller every time the remaining charge of the battery decreases by a preset first reference amount at an interval longer than an execution interval of the polling in the operating state, and after outputting the notification signal in the first state, the battery outputs the notification signal in a second state; When the electronic device is in the sleep state, When the notification signal is in the first state, the controller starts up and outputs a status confirmation request to the battery to confirm the status of the battery, and when a status confirmation response output from the battery in response to the status confirmation request indicates that the remaining charge of the battery is greater than a preset second reference amount and that the battery is in a normal state, the controller stops functioning, and when the status confirmation response indicates that the remaining charge of the battery is less than the second reference amount or that the battery is in an abnormal state, the controller starts performing the polling, and when the notification signal is in the second state, the controller does not start up. .

[0010] In one embodiment of the present invention, the remaining charge of the battery The above When the remaining charge of the battery is greater than a second reference amount, the battery outputs the notification signal that the battery is in the second state, and when the remaining charge of the battery becomes equal to or less than the second reference amount, the battery outputs the notification signal that the battery is in the first state.

[0011] In one aspect of the present invention, when the battery is in a normal state, the battery outputs the notification signal in the second state, and when the battery is in an abnormal state, the battery outputs the notification signal in the first state.

[0012] In one aspect of the present invention, the electronic device includes a power supply circuit to which an external power source is connected and which outputs power supplied from the external power source to the battery, and when the external power source is connected to the power supply circuit, the controller executes the polling regardless of the notification signal, and when the electronic device is in the sleep state with the external power source not connected to the power supply circuit, When the notification signal is in the first state, the controller starts up and outputs a status confirmation request to the battery to confirm the status of the battery, and when a status confirmation response output from the battery in response to the status confirmation request indicates that the remaining charge of the battery is greater than a preset second reference amount and that the battery is in a normal state, the controller stops functioning, and when the status confirmation response indicates that the remaining charge of the battery is less than the second reference amount or that the battery is in an abnormal state, the controller starts performing the polling, and when the notification signal is in the second state, the controller does not start up. This is also fine.

[0013] One aspect of the present invention is a method for controlling an electronic device that switches between an operating state and a sleep state, the method comprising the steps of: The controller performing periodic polling to check the battery status; a step of outputting a notification signal that the battery is in a first state to start up the controller each time the remaining charge of the battery decreases by a first reference amount at an interval longer than an interval at which the polling is executed in the operating state; and a step of outputting the notification signal that the battery is in a second state after outputting the notification signal that the battery is in the first state. When the electronic device is in the sleep state, a step of starting up the controller and outputting a status confirmation request to the battery to confirm the status of the battery when the notification signal is in the first state; a step of the controller stopping functioning when a status confirmation response output from the battery in response to the status confirmation request indicates that the remaining charge of the battery is greater than a preset second reference amount and that the battery is in a normal state; and a step of the controller starting execution of the polling when the status confirmation response indicates that the remaining charge of the battery is less than the second reference amount or that the battery is in an abnormal state. Equipped with When the notification signal is in the second state, the controller does not wake up. . Effect of the Invention

[0014] According to the present invention, it is possible to reduce power consumption in the sleep state. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a diagram illustrating an example of a hardware configuration of an electronic device according to an embodiment. [Diagram 2] FIG. 2 is a diagram illustrating an example of a functional configuration of an electronic device according to an embodiment. [Diagram 3] 5 is a timing chart showing an example of a waveform of a notification signal in the embodiment. [Figure 4] 5 is a flowchart illustrating an example of the operation of the electronic device according to the embodiment. [Diagram 5] 5 is a flowchart illustrating an example of the operation of the electronic device according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0017] An example of a hardware configuration of an electronic device 10 according to an embodiment will be described with reference to Fig. 1. Fig. 1 is a block diagram showing an example of a hardware configuration of the electronic device 10.

[0018] The electronic device 10 includes a CPU 11, a main memory 12, a video subsystem 13, a display unit 14, a chipset 21, a BIOS memory 22, a storage medium 23, an audio system 24, a WLAN card 25, a USB connector 26, an embedded controller 31, an input unit 32, a power supply circuit 33, and a battery 34.

[0019] The CPU 11 executes various arithmetic processing under program control, and controls the entire electronic device 10. For example, the CPU 11 executes processing based on programs of an OS (Operating System) and a BIOS (Basic Input Output System). The CPU 11 is an example of a processor.

[0020] The main memory 12 is a writable memory used as a read area for the execution program of the CPU 11 or as a work area for writing processing data for the execution program. The main memory 12 is composed of, for example, multiple DRAM (Dynamic Random Access Memory) chips. The execution program includes an OS, various drivers for operating the hardware of peripheral devices, various services / utilities, application programs, etc.

[0021] Video subsystem 13 is a subsystem for implementing functions related to image display, and includes a video controller. The video controller processes drawing commands from CPU 11, writes the processed drawing information to a video memory, and also reads the drawing information from the video memory and outputs it to display unit 14 as drawing data (display data).

[0022] The display unit 14 is, for example, a liquid crystal display or an organic EL display, and displays a display screen based on drawing data (display data) output from the video subsystem 13.

[0023] The chipset 21 includes controllers for a Universal Serial Bus (USB), a serial AT Attachment (Serial ATA), a Serial Peripheral Interface (SPI) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express bus, and a Low Pin Count (LPC) bus, and is connected to a plurality of devices. For example, the plurality of devices include a BIOS memory 22 (described later), a storage medium 23, an audio system 24, a WLAN card 25, a USB connector 26, and an embedded controller 31.

[0024] The BIOS memory 22 is configured with an electrically rewritable non-volatile memory such as an EEPROM (Electrically Erasable Programmable Read Only Memory) or a flash ROM. The BIOS memory 22 stores the BIOS and system firmware for controlling the embedded controller 31, etc. The BIOS memory 22 is an example of a sub-memory.

[0025] The storage medium 23 includes a hard disk drive (HDD), a solid state drive (SSD), etc. For example, the storage medium 23 stores an OS, various drivers, various services / utilities, application programs, and various data.

[0026] The audio system 24 is connected to a microphone and a speaker (not shown) and records, plays, and outputs audio data. The microphone and the speaker are built into the electronic device 10, for example.

[0027] The WLAN (Wireless Local Area Network) card 25 connects to a network via a wireless LAN to perform data communication. For example, when the WLAN card 25 receives data from the network, it generates an event trigger indicating that the data has been received. The USB connector 26 is a connector for connecting peripheral devices that use USB.

[0028] The input unit 32 collectively indicates input devices (input equipment) provided in the electronic device 10. The input unit 32 includes a keyboard, a mouse, etc. The input unit 32 outputs, to the embedded controller 31, input information input by a user operation.

[0029] The power supply circuit 33 includes, for example, a DC / DC converter, a charge / discharge unit, an AC / DC adapter, etc. For example, the power supply circuit 33 converts a DC voltage supplied from an external power source such as an AC adapter (not shown) or a battery 34 into a plurality of voltages required to operate the electronic device 10. The power supply circuit 33 also supplies power to each unit of the electronic device 10 based on the control from the embedded controller 31.

[0030] The battery 34 is, for example, a secondary battery such as a lithium ion battery. When power is supplied from an external power source to the electronic device 10, the battery 34 is charged via the power supply circuit 33. When power is not supplied from an external power source to the electronic device 10, the battery 34 outputs the accumulated power via the power supply circuit 33 as operating power for the electronic device 10.

[0031] The embedded controller 31 is a one-chip microcomputer that monitors and controls various devices (peripheral devices, sensors, etc.) regardless of the system state of the electronic device 10. The embedded controller 31 includes a CPU, ROM, RAM, A / D input terminals for multiple channels, a D / A output terminal, a timer, and digital input / output terminals (not shown). An input unit 32, a power supply circuit 33, etc. are connected to the digital input / output terminals of the embedded controller 31, and the embedded controller 31 controls the operations of these. The embedded controller 31 also controls changes in the clock frequency of the CPU 11 via the chipset 21.

[0032] The electronic device 10 may be a clamshell type personal computer, a tablet terminal, or a portable device such as a smartphone, in which a display device is integrally attached to a housing. Alternatively, the electronic device 10 may be a desktop type personal computer, in which the device body and the display device are separate. The electronic device according to the present embodiment is applicable to all devices equipped with a CPU.

[0033] An example of the functional configuration of the electronic device 10 will be described with reference to Fig. 2. Fig. 2 is a block diagram showing an example of the functional configuration of the electronic device 10 related to control of the power supply state.

[0034] The electronic device 10 includes a control unit 100, a storage unit 110, a power supply circuit 33, and a battery 34. The functions of the control unit 100 are realized by a CPU 11, an embedded controller 31, or a combination of the CPU 11 and the embedded controller 31.

[0035] The storage unit 110 stores programs executed by the control unit 100, data used by the control unit 100, and data generated by the control unit 100. The functions of the storage unit 110 are realized by the main memory 12, the storage medium 23, or a combination of the main memory 12 and the storage medium 23.

[0036] When the external power source 40 is connected to the power source circuit 33, the power source circuit 33 outputs the power supplied from the external power source 40 to the battery 34. When the external power source 40 is not connected to the power source circuit 33, the power source circuit 33 outputs the power supplied from the battery 34 to each unit in the electronic device 10.

[0037] The control unit 100 controls the power state of the electronic device 10 according to the remaining capacity of the battery 34. The power state of the electronic device 10 is set to one of S0 (operating state), ModS (sleep state), S4 (hibernation state), and S5 (shutdown state). ModS may be S0i3. When the electronic device 10 is in S0, the control unit 100 executes polling to periodically check the state of the battery 34. When the electronic device 10 is in ModS, the control unit 100 controls the execution of polling based on a notification signal output from the battery 34. The switching between S0 and ModS is executed according to, for example, a user's instruction.

[0038] The battery 34 includes a battery control unit 34a, a rechargeable battery 34b, and a memory 34c. The rechargeable battery 34b is a secondary battery. The battery control unit 34a monitors the state of the rechargeable battery 34b according to firmware recorded in the memory 34c. The memory 34c includes a ROM in which the firmware is recorded, and a RAM for storing the remaining capacity of the rechargeable battery 34b, etc.

[0039] The battery control unit 34a outputs a notification signal having a voltage level according to the state of the rechargeable battery 34b. The notification signal has a high level (H) or a low level (L). The notification signal is input to the control unit 100 via the power supply circuit 33.

[0040] FIG. 3 shows an example of the waveform of the notification signal. Under normal conditions, the notification signal is at a high level. Every time the remaining charge of the rechargeable battery 34b decreases by a first reference amount, the notification signal becomes a low level. For example, the first reference amount is 1% of the full charge capacity. The first reference amount is recorded in the ROM of the memory 34c. At time T1 when the remaining charge of the rechargeable battery 34b decreases by the first reference amount, the notification signal becomes a low level. The notification signal is maintained at a low level for a predetermined period (for example, 250 ms) from time T1, and then returns to a high level.

[0041] The notification signal goes to low level at time T2 when the remaining charge of the rechargeable battery 34b has decreased by a first reference amount from the remaining charge at time T1. The notification signal is maintained at low level for a predetermined period (e.g., 250 ms) from time T2 and then returns to high level.

[0042] At timing T3, the remaining charge of the rechargeable battery 34b becomes equal to or less than a second reference amount set in advance. For example, the second reference amount is 5% or 2% of the full charge capacity. The second reference amount is recorded in the ROM of the memory 34c. At timing T3, the notification signal goes to low level, and thereafter, the notification signal is maintained at low level. When an abnormality such as a temperature abnormality occurs, the notification signal also goes to low level.

[0043] In this embodiment, the battery 34 outputs a notification signal having a low level. This allows the battery 34 to wake up the control unit 100 in a sleep state. When the notification signal having a low level is output, the control unit 100 checks the state of the battery 34. When the remaining charge of the battery 34 is low or some abnormality occurs in the battery 34, the control unit 100 executes polling to avoid an abnormal shutdown. This allows the power consumption in the sleep state to be reduced compared to when polling is executed all the time.

[0044] In the above example, the first reference amount for the decrease in the remaining charge of the rechargeable battery 34b is 1% of the full charge capacity. The first reference amount is set so that the time required for the remaining charge of the rechargeable battery 34b to decrease by the first reference amount is longer than the polling interval (polling interval).

[0045] A personal computer has various operation modes, and the interval suitable for checking the status of the battery 34 varies depending on the operation mode. The capacity of the ROM of the battery 34 is limited, and it is difficult to record various conditions for checking the status of the battery 34 in the ROM of the battery 34.

[0046] In this embodiment, when the electronic device 10 is in a sleep state, the control unit 100 controls the execution of polling based on a notification signal output from the battery 34. In particular, when the external power source 40 is not connected to the power supply circuit 33 and the electronic device 10 is in a sleep state, the control unit 100 controls the execution of polling based on the notification signal. This makes it possible to reduce power consumption in the sleep state. When the external power source 40 is connected to the power supply circuit 33 or when the electronic device 10 is in a power supply state other than the sleep state, the control unit 100 executes normal polling.

[0047] The operation of the electronic device 10 will be described with reference to Figures 4 and 5. Figure 4 shows an example of a process executed by the control unit 100.

[0048] (Step S100) The control unit 100 monitors the state of the power supply circuit 33 and determines whether or not the external power supply 40 is connected to the power supply circuit 33 .

[0049] (Step S101) If the external power source 40 is not connected to the power circuit 33 , the control unit 100 checks the power state of the electronic device 10 .

[0050] (Step S102) When the electronic device 10 is in ModS, the control unit 100 stops functioning. While a high-level notification signal is being output from the battery 34, the control unit 100 maintains the stopped state. When a low-level notification signal is output from the battery 34, the control unit 100 starts up.

[0051] (Step S103) The control unit 100 outputs a status confirmation request to the battery 34 to confirm the status of the battery 34. The control unit 100 receives a status confirmation response output from the battery 34, and determines the status of the battery 34 based on the status confirmation response. The status confirmation response includes information indicating the status of the battery 34. For example, the status confirmation response includes information indicating the remaining charge of the battery 34 and information indicating whether or not an abnormality has occurred in the battery 34.

[0052] If the remaining charge of the battery 34 is greater than a preset second reference amount and the battery 34 is in a normal state, the control unit 100 stops functioning. After that, the electronic device 10 transitions to the state in step S102.

[0053] (Step S104) If the remaining charge of the battery 34 is less than the second reference amount or if the battery 34 is in an abnormal state, the control unit 100 sets the polling interval to 5 seconds and starts polling. After that, the same process as normal polling is executed.

[0054] (Step S105) If the external power supply 40 is connected to the power supply circuit 33, the control unit 100 sets the polling interval to 2 seconds and starts polling. After that, the same process as normal polling is executed.

[0055] (Step S106) When the electronic device 10 is in S0, the control unit 100 outputs a status confirmation request to the battery 34 to confirm the status of the battery 34. The control unit 100 receives a status confirmation response output from the battery 34, and determines the status of the battery 34 based on the status confirmation response.

[0056] If the remaining charge of the battery 34 is less than the second reference amount or if the battery 34 is in an abnormal state, the control unit 100 sets the polling interval to 5 seconds in step S104 and starts polling. After that, the same process as normal polling is executed.

[0057] (Step S107) If the remaining charge of the battery 34 is greater than the second reference amount and the battery 34 is in a normal state, the control unit 100 sets the polling interval to 30 seconds and starts polling. After that, the same process as normal polling is executed.

[0058] FIG. 5 shows an example of a process executed by the battery control unit 34a of the battery 34.

[0059] (Step S200) The battery control unit 34a checks the remaining charge of the rechargeable battery 34b. When the first remaining charge check is performed, the battery control unit 34a records the remaining charge of the rechargeable battery 34b in the memory 34c.

[0060] (Step S201) The memory 34c holds the remaining amount confirmed in the first remaining amount confirmation or the remaining amount confirmed when the notification signal having a low level was last output from the battery 34. The battery control unit 34a determines whether the remaining amount confirmed in step S200 has decreased by a first reference amount from the remaining amount recorded in the memory 34c. For example, the first reference amount is 1% of the full charge capacity of the rechargeable battery 34b.

[0061] (Step S202) When the remaining charge of the rechargeable battery 34b has decreased by the first reference amount, the battery control unit 34a outputs a notification signal having a low level, and records the remaining charge confirmed in step S200 in the memory 34c.

[0062] (Step S203) After outputting the notification signal having a low level, the battery control unit 34a determines whether or not it has received a state check request output from the control unit 100. If the state check request has not been received, the battery control unit 34a checks the remaining charge of the rechargeable battery 34b in step S200.

[0063] (Step S204) If a status confirmation request has been received, the battery control unit 34a confirms the status of the rechargeable battery 34b and outputs a status confirmation response including status information indicating the status. After that, in step S200, the battery control unit 34a confirms the remaining amount of the rechargeable battery 34b.

[0064] (Step S205) When the remaining charge of the rechargeable battery 34b has decreased by the first reference amount, the battery control unit 34a checks the state of the rechargeable battery 34b. When the remaining charge of the rechargeable battery 34b is equal to or less than the second reference amount or the rechargeable battery 34b is in an abnormal state, the battery control unit 34a outputs a notification signal having a low level in step S202. The battery control unit 34a also records the remaining charge checked in step S200 in the memory 34c. When the remaining charge of the rechargeable battery 34b is greater than the second reference amount and the rechargeable battery 34b is in a normal state, the battery control unit 34a checks the remaining charge of the rechargeable battery 34b in step S200.

[0065] As described above, the electronic device 10 switches between an operating state (S0) and a sleep state (ModS). When the electronic device 10 is in the operating state, the control unit 100 (controller) executes polling to periodically check the state of the battery 34. When the electronic device 10 is in the sleep state, the control unit 100 controls the execution of polling based on a notification signal output from the battery 34. This allows the electronic device 10 to reduce power consumption in the sleep state.

[0066] The notification signal is either a low level (first state) or a high level (second state). When the notification signal is at a low level, the control unit 100 performs polling. When the notification signal is at a high level, the control unit 100 does not perform polling.

[0067] Each time the remaining charge of battery 34 decreases by a preset first reference amount, battery 34 outputs a notification signal having a low level. After outputting the notification signal having a low level, battery 34 outputs a notification signal having a high level. After battery 34 confirms that the remaining charge of battery 34 has decreased by the first reference amount, battery 34 outputs a notification signal having a high level until battery 34 next confirms this.

[0068] While polling is stopped, the OS cannot obtain information about the remaining charge of the battery 34. Because the battery 34 outputs a notification signal having a low level every time the remaining charge of the battery 34 decreases by the first reference amount, the OS can output a status confirmation request to the battery 34 and obtain information about the remaining charge of the battery 34.

[0069] When the remaining charge of the battery 34 is greater than a preset second reference amount, the battery 34 outputs a notification signal at a high level. When the remaining charge of the battery 34 falls below the second reference amount, the battery 34 outputs a notification signal at a low level. The electronic device 10 can avoid the occurrence of an abnormal shutdown when the remaining charge of the battery 34 is low.

[0070] When the battery 34 is in a normal state, the battery 34 outputs a notification signal at a high level. When the battery 34 is in an abnormal state, the battery 34 continues to output a notification signal at a low level. The electronic device 10 can avoid the occurrence of an abnormal shutdown when an abnormality occurs in the battery 34.

[0071] The external power source 40 is connected to the power supply circuit 33, and the power supply circuit 33 outputs power supplied from the external power source 40 to the battery 34. When the external power source 40 is connected to the power supply circuit 33, the control unit 100 executes polling regardless of the notification signal. When the electronic device 10 is in a sleep state with the external power source 40 not connected to the power supply circuit 33, the control unit 100 controls the execution of polling based on the notification signal. The electronic device 10 can reduce power consumption in the sleep state.

[0072] Although an embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to the above embodiment, and design modifications and the like that do not deviate from the gist of the present invention are also included. [Explanation of symbols]

[0073] 10 electronic device, 11 CPU, 12 main memory, 13 video subsystem, 14 display unit, 21 chipset, 22 BIOS memory, 23 storage medium, 24 audio system, 25 WLAN card, 26 USB connector, 31 embedded controller, 32 input unit, 33 power supply circuit, 34 battery, 34a battery control unit, 34b rechargeable battery, 34c memory, 100 control unit, 110 storage unit

Claims

1. An electronic device that switches between an operating state and a sleep state, A battery; A controller; Equipped with When the electronic device is in the operational state, the controller periodically polls the battery to determine its status; the battery outputs a notification signal in a first state to start the controller every time the remaining charge of the battery decreases by a preset first reference amount at an interval longer than an interval at which the polling is performed in the operating state; after outputting the notification signal in the first state, the battery outputs the notification signal in a second state; When the electronic device is in the sleep state, When the notification signal is in the first state, the controller is started up and outputs a status confirmation request to the battery to confirm the status of the battery; When a state confirmation response output from the battery in response to the state confirmation request indicates that the remaining charge of the battery is greater than a second preset reference amount and that the battery is in a normal state, the controller stops functioning; If the status confirmation response indicates that the remaining charge of the battery is less than the second reference amount or that the battery is in an abnormal state, the controller starts performing the polling; When the notification signal is in the second state, the controller does not wake up. electronic equipment.

2. When the remaining charge of the battery is greater than the second reference amount, the battery outputs the notification signal indicating that the battery is in the second state; When the remaining charge of the battery becomes equal to or less than the second reference amount, the battery outputs the notification signal indicating that the battery is in the first state.

2. The electronic device according to claim 1.

3. When the battery is in a normal state, the battery outputs the notification signal that the battery is in the second state; When the battery is in an abnormal state, the battery outputs the notification signal in the first state.

2. The electronic device according to claim 1.

4. a power supply circuit connected to an external power supply and configured to output power supplied from the external power supply to the battery; When the external power source is connected to the power circuit, the controller performs the polling regardless of the notification signal; When the external power source is not connected to the power supply circuit and the electronic device is in the sleep state, When the notification signal is in the first state, the controller is started up and outputs a status confirmation request to the battery to confirm the status of the battery; When a state confirmation response output from the battery in response to the state confirmation request indicates that the remaining charge of the battery is greater than a second preset reference amount and that the battery is in a normal state, the controller stops functioning; If the status confirmation response indicates that the remaining charge of the battery is less than the second reference amount or that the battery is in an abnormal state, the controller starts performing the polling; When the notification signal is in the second state, the controller does not wake up.

2. The electronic device according to claim 1.

5. A method for controlling an electronic device that switches between an operating state and a sleep state, comprising: When the electronic device is in the operational state, a controller periodically polls the battery to check its status; outputting a notification signal in a first state to start up the controller each time the remaining charge of the battery decreases by a first reference amount at an interval longer than an interval at which the polling is performed in the operating state; outputting the notification signal that the battery is in the first state and thereafter outputting the notification signal that the battery is in a second state; When the electronic device is in the sleep state, When the notification signal is in the first state, the controller is started up and outputs a state confirmation request to the battery to confirm the state of the battery; when a state confirmation response output from the battery in response to the state confirmation request indicates that the remaining charge of the battery is greater than a second preset reference amount and that the battery is in a normal state, the controller stops functioning; if the status confirmation response indicates that the remaining charge of the battery is less than the second reference amount or that the battery is in an abnormal state, the controller starts performing the polling; Equipped with When the notification signal is in the second state, the controller does not wake up. A method for controlling electronic devices.

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