WO2020020356A1

WO2020020356A1 - Smart watch and mode switching method therefor

Info

Publication number: WO2020020356A1
Application number: PCT/CN2019/097942
Authority: WO
Inventors: 胡二勐
Original assignee: 青岛海信移动通信技术股份有限公司
Priority date: 2018-07-26
Filing date: 2019-07-26
Publication date: 2020-01-30

Abstract

Disclosed is a smart watch. A power supply management unit (30) thereof is provided with two control signal input circuits, so that when a high level signal output by a master control unit (10) and/or a slave control unit (20) is received, the power supply management unit (30) can output a high level voltage signal so as to provide a power supply voltage to the slave control unit (20) electrically connected thereto. Therefore, when the power supply management unit (30) is in a power-on state under the control of the master control unit (10) and realizes the supply of power to the slave control unit (20), the power supply management unit (30) can keep providing the power supply voltage to the slave control unit (20) by outputting the high level signal from the slave control unit (20) to the power supply management unit (30), so that the power-on and power-off states of the master control unit (10) do not affect the power-on state of the slave control unit (20) and the power supply management unit (30). Further disclosed is a mode switching method for a smart watch.

Description

Smart watch and its mode switching method

Cross-reference to related applications

This application claims the priority of a Chinese patent application filed on July 26, 2018 with an application number of 201810835553.7, and the priority of a Chinese patent application filed on July 26, 2018 and with an application number of 201810836679.6. The entire text is incorporated herein by reference.

Technical field

The present disclosure relates to the field of smart terminals, and in particular, to a smart watch and a mode switching method thereof.

Background technique

As a wearable mobile device, a smart watch has one or more data processing functions such as reminding, navigation, monitoring, and interaction, in addition to the function of indicating time. Due to the limited design space of smart watches, the battery capacity of smart watches is inevitably limited, which creates a conflict between high-power data processing functions and low-capacity batteries. Therefore, how to maximize the battery life of a smart watch with limited battery capacity has become an urgent problem to be solved.

Smart watches are generally divided into running mode, standby mode, and shutdown mode, and the master processor and slave processor are set to correspondingly execute task instructions in different modes and different power consumption. Among them, the main processor has strong processing performance but high power consumption, and is mainly used to perform high-load tasks (such as displaying maps, calculating real-time parameters, synchronizing data, displaying communication information, etc.), so that smart watches can run smoothly. Various complex applications while the smartwatch is in run mode. The slave processor has weak processing performance, but low power consumption, and is mainly used to perform low-load tasks (such as processing sensor data in the standby state). At this time, the smart watch is in the standby mode. In this way, when processing low-load tasks, the working frequency of the main processor is greatly reduced, thereby reducing the power consumption of the smart watch to a certain extent.

Summary of the Invention

The embodiment of the present application relates to a smart watch and a mode switching method thereof, so as to solve the problem of increasing the energy consumption of the smart watch due to the main processor being continuously powered on.

In a first aspect, the present application relates to a smart watch, including: a master control unit; a slave control unit connected to the master control unit through a first interface; and a power management unit having: an enabling end and the master control unit The control signal output terminal of the unit is connected to the control signal output terminal of the slave control unit; and the voltage output terminal is electrically connected to the power access terminal of the slave control unit. Wherein, the master control unit is configured to control the slave control unit to output high to the enable terminal of the power management unit through the first interface before the power supply circuit of the master control unit is turned off. Level signal; the power management unit is configured to, in response to receiving the high-level signal at the enable terminal of the power management unit, output power from the voltage output terminal of the power management unit Voltage.

In a second aspect, the present application also relates to a mode switching method for a smart watch, including: the main control unit of the smart watch responds to receiving a trigger instruction to switch from a shutdown mode to an operating mode, and manages the power of the smart watch; The enable terminal of the unit outputs a high-level signal, so that the power management unit outputs a power supply voltage to a slave control unit of the smart watch; the master control unit is responsive to receiving a trigger instruction to switch from the operating mode to the watch mode , Controlling the slave control unit to output the high-level signal to the enable terminal of the power management unit through a first interface, and after receiving a first confirmation instruction fed back from the slave control unit, closing all The power supply circuit of the main control unit is described.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the description serve to explain the principles of the application.

In order to explain the technical solutions in the embodiments of the present application more clearly, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, for those skilled in the art, Under the premise, other drawings can also be obtained according to these drawings.

FIG. 1A is a circuit block diagram of a smart watch according to an embodiment of the present application.

FIG. 1B is a circuit block diagram of another smart watch according to an embodiment of the present application.

FIG. 2 is a circuit block diagram of another smart watch according to an embodiment of the present application.

FIG. 3A is a flowchart of a mode switching method for a smart watch according to an embodiment of the present application.

3B is a flowchart of another method for switching modes of a smart watch according to an embodiment of the present application.

FIG. 4A is a flowchart of another mode switching method for a smart watch according to an embodiment of the present application.

4B is a flowchart of another method for switching modes of a smart watch according to an embodiment of the present application.

detailed description

In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described The examples are only part of the examples of this application, but not all examples. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts should fall within the protection scope of this application.

For smart watches that execute different modes by setting the main processor and the slave processor, the main processor still needs to be powered on in standby mode in order to power the slave processor and identify different task types (high-load tasks) Or low-load tasks) to control the slave processor's response to low-load tasks. Among them, the continuous power-on state of the main processor inevitably increases the energy consumption of the smart watch.

The present application relates to a smart watch and a mode switching method thereof. The core idea thereof is to set two control signal input lines for a power management unit of a smart watch. When the power management unit receives a high-level signal, such as a high-level voltage signal, output from the main control unit of the smart watch and / or a slave control unit of the smart watch, it can output a high-level voltage signal, such as The power supply voltage provides a power supply voltage for the slave control unit electrically connected to the output terminal of the power management unit. In the embodiment of the present application, the voltage output of the power management unit can be controlled separately through two circuits. In this way, after the power management unit is in the power-on state under the control of the main control unit, by controlling the output of the high-level signal from the control unit, the power management unit can also be controlled to provide the power supply voltage to itself and the slave control unit. At this time, the power-on and power-off states of the master control unit will no longer affect the power-on states of the slave control unit and power management unit. Through the above circuit design and function implementation, the slave control unit can be run independently when the master control unit is powered off, so that when the smart watch is in watch mode and other modes with low task load, it can effectively save unnecessary for the smart watch Energy consumption. Further description will be made below with reference to the drawings and specific embodiments.

Please refer to FIG. 1A, which shows a circuit diagram of a smart watch according to an embodiment of the present application. It can be seen from FIG. 1A that the smart watch provided in this embodiment includes a master control unit 10, a slave control unit 20, and a power management unit 30. The master control unit 10 and the slave control unit 20 are electrically connected through a first interface, so that the master control unit 10 can control the slave control unit 20 and the slave control unit 20 can feedback to the master control unit 10. The first interface may be a common processor interface such as a SPI (Serial, Peripheral, Interface), a Universal Asynchronous Receiver Transmitter (UART) interface, or an I2C (Inter Integrated Integrated Circuit) interface. . The slave control unit 20 may be a Sensor HUB (Intelligent Sensor Hub) for connecting and processing data from various sensor devices. In addition, in practical applications, the slave control unit 20 can also be connected to multiple sensors for collecting and processing related sensor data.

The control signal output terminal 12 of the main control unit 10 and the control signal output terminal 21 of the slave control unit 20 are both connected to the enable terminal 35 of the power management unit 30, so that the power management unit 30 receives the main control unit 10 and / Or when a high-level signal is input from the control unit 20, the power supply voltage is output from the voltage output terminal 33 of the power management unit 30. The voltage output terminal 33 of the power management unit 30 is electrically connected to the power access terminal 22 of the control unit 20. The power management unit 30 is configured to provide a power supply voltage to the slave control unit 20 when receiving a high-level signal input from the master control unit 10 and / or the slave control unit 20.

In this embodiment, the power management unit 30 is provided with two enabling control signal input lines, respectively, the main control unit 10 (which may be specifically its control signal output terminal 12) to the enable input terminal 35 of the power management unit 30, And from the control unit 20 (which may be its control signal output terminal 21) to the enable input terminal 35 of the power management unit 30. In this way, when the enable terminal 35 of the power management unit 30 receives the high-level signals input from the master control unit 10 and / or the slave control unit 20, it can output the power supply voltage from the voltage output terminal 33, so as to supply power to the power supply. The voltage output terminal 33 of the management unit 30 is electrically connected to provide a power supply voltage from the control unit 20.

In the embodiment of the present application, the voltage output of the power management unit 30 can be controlled separately through two circuits. Specifically, the power management unit 30 may output a power supply voltage from the voltage output terminal 33 of the power management unit 30 to the voltage input terminal 22 of the control unit 20 in response to receiving a high-level signal from the main control unit 10 at the enable terminal 35. . The power management unit 30 may also output a power voltage from the voltage output terminal 33 of the power management unit 30 to the voltage input terminal 22 of the slave control unit 20 in response to receiving a high-level signal from the slave control unit 20 at the enable terminal 35. In this way, after the power management unit 30 is in a power-on state under the control of the main control unit 10 and power is supplied to the slave control unit 20, the main control unit 10 can control the use of the slave control unit 20 to the power management unit 30 via the first interface. The energy terminal 35 outputs a high-level signal, so that the power management unit 30 keeps supplying the power supply voltage to the slave control unit 20 according to the control of the slave control unit 20, and the power-on and power-off states of the master control unit will no longer supply the slave control unit The power-on state of 20 has an effect. Through the above circuit design and function implementation, the slave control unit 20 can be operated separately when the master control unit 10 is in a power-off state, so that the smart watch can be a smart watch when the smart watch is in a watch mode and other modes with a lower task load. Effectively save unnecessary energy consumption.

Please refer to FIG. 1B, which shows a circuit diagram of a smart watch according to an embodiment of the present application. As can be seen from FIG. 1B, compared with that shown in FIG. 1A, the smart watch in this embodiment includes an enable control unit 60. For a basic introduction of the master control unit 10 and the slave control unit 20, refer to the foregoing description, and details are not described herein again. In addition, the enable control unit 60 in FIG. 1B can be regarded as a front-end function module of the enable terminal 35 of the power management unit 30 in FIG. 1A. In other words, the enable control unit 60 in FIG. 1B and the enable terminal EN of the power management unit 30 jointly implement the functions of the enable terminal 35 of the power management unit 30 in FIG. 1A.

The control signal output terminal 12 of the master control unit 10 and the control signal output terminal 21 of the slave control unit 20 are both connected to the input terminal 61 of the enable control unit 60. In this way, when the enable control unit 60 receives the high-level signals input from the master control unit 10 and / or the slave control unit 20 at the input terminal 61, it outputs an enable from the output terminal 62 of the enable control unit 60 A signal, such as a high-level signal, is sent to the enable terminal EN of the power management unit 30. The voltage output terminal 33 of the power management unit 30 is electrically connected to the power access terminal 22 of the control unit 20. The output terminal 62 of the enable control unit 60 is connected to the enable terminal EN of the power management unit 30, so that the power management unit 30 can output power from the voltage output terminal 33 of the power management unit 30 when the enable control unit 60 is enabled. The voltage is applied to the power supply terminal 22 of the slave control unit 20 to supply power to the slave control unit 20.

In this embodiment, the enable control unit 60 is provided with two enable control signal input lines, which are respectively the main control unit 10 (which may be specifically its control signal output terminal 12) to the input terminal 61 of the enable control unit 60, And from the control unit 20 (which may be specifically its control signal output terminal 21) to the input terminal 61 of the enable control unit 60. In this way, when the enable control unit 60 receives a high-level signal input from the master control unit 10 and / or the slave control unit 20 at its input terminal 61, it can output an enable signal to the enable terminal EN of the power management unit 30. An enable signal to enable the voltage output terminal 33 of the power management unit 30 to output a power voltage to the power access terminal 22 of the control unit 20.

In this embodiment, as shown by a dashed line in FIG. 1B, any one of the power supply circuit of the main control unit 10 and the power management unit 30 can supply power to the enable control unit 60.

In some embodiments, the voltage output of the power management unit 30 can be controlled separately through two circuits. Specifically, the enable control unit 60 may output a high voltage from the output terminal 62 of the enable control unit 60 to the enable terminal EN of the power management unit 30 in response to receiving a high-level signal from the main control unit 10 at the input terminal 61. The signal is leveled to enable the power management unit 30 to output a power voltage from the voltage output terminal 33 of the power management unit 30 to the power access terminal 22 of the control unit 20. In addition, the enable control unit 60 may also output a high voltage from the output terminal 62 of the enable control unit 60 to the enable terminal EN of the power management unit 30 in response to receiving a high-level signal from the slave control unit 20 at the input terminal 61. The signal is leveled to enable the power management unit 30 to output a power voltage from the voltage output terminal 33 of the power management unit 30 to the power access terminal 22 of the control unit 20. In this way, after the power management unit 30 is in the power-on state under the control of the main control unit 10 and realizes power supply to the slave control unit 20, the main control unit 10 can control the slave control unit 20 to enable the control unit 60 through the first interface. The input terminal 61 outputs a high-level signal, so that the output terminal 62 of the enable control unit 60 keeps outputting a high-level signal to the enable terminal EN of the power management unit 30, so that the power management unit 30 keeps supplying the slave control unit 20 The power supply voltage and the power-on and power-off states of the master control unit will no longer affect the power-on state of the slave control unit 20 thereafter. In addition, even if the main control unit 10 does not work, the enable control unit 60 can continue to work under the power supply of the power management unit 30. Through the above circuit design and function implementation, the slave control unit 20 can be operated separately when the master control unit 10 is in a power-off state, so that when the smart watch is in a mode with a lower task load, it can effectively save unnecessary for the smart watch Energy consumption.

Please refer to FIG. 2, which shows a circuit diagram of another smart watch according to an embodiment of the present application. With reference to FIG. 1A and FIG. 1B, it can be seen from FIG. 2 that the enable control unit 60 in FIG. 1B may include a logic OR gate circuit 31. Alternatively, in other words, the power management unit 30 in FIG. 1A may include a logical OR gate circuit 31 as a pre-function module of the enable terminal 35. The first input terminal A of the logical OR gate circuit 31 is electrically connected to the control signal output terminal 12 of the main control unit 10, and the second input terminal B of the logical OR gate circuit 31 is electrically connected to the control signal output terminal 21 of the slave control unit 20. connection. An output terminal Y of the logical OR circuit 31 is electrically connected to an enable terminal EN of the power management unit 30. When the control signal output terminal 12 of the main control unit 10 and / or the control signal output terminal 21 of the control unit 20 outputs a high-level signal, the logical OR gate circuit 31 outputs an enable signal from the output terminal Y. In this embodiment, the master control unit 10 and the slave control unit 20 jointly control the logical OR gate circuit 31 to implement dual control of the enable control unit 60 (which may be specifically the logical OR gate circuit 31).

Under normal circumstances, the power supply voltage of the master control unit 10 and the slave control unit 20 is about 1.8V, and the high-level signal output by the logic OR circuit 31 is about 1.4V, which is used to control the power management unit (hereinafter also referred to as The power management circuit, illustrated in FIG. 2 is a DC-DC circuit) 30 is turned on or off. Among them, as shown in FIG. 2, the power of the DC-DC 30 is input from a pin that serves as the power supply access terminal VIN, and can be directly powered by a battery voltage, for example. In addition, the DC-DC 30 outputs the voltage through the output terminal VOUT after converting the battery voltage to a low voltage of 1.8 V to supply power to the slave control unit 20 and / or the logic OR gate circuit 31. The power access terminal 36 of the logical OR circuit 31 is electrically connected to the power output terminal 11 of the main control unit 10 and the output terminal VOUT of the power management unit 30, respectively. The output terminal VOUT of the power management unit 30 is connected to all The electrical connection from the power access terminal 22 of the control unit 20 is described. In this way, both the master control unit 10 and the power management unit 30 can supply power to the logic OR gate circuit 31, so that the turning on of the logic OR gate circuit 31 and the subsequent power supply by the power management unit 30 to the slave control unit 20 may not be completely controlled by the master control The unit 10 does not need to be modified to the power management unit 30, so that the two enable signals from the master control unit 10 and the slave control unit 20 can effectively implement the power supply enable control of the power management circuit 30 together.

Further, the smart watch further includes a display unit 40 electrically connected to the master control unit 10 through a second interface; the display unit 40 is electrically connected to the slave control unit 20 through a third interface. The second interface and the third interface can respectively realize data transmission to the display unit 40 by the master control unit 10 and the slave control unit 20 and other display control. In this embodiment, the second interface may be MIPI (Mobile Industry Processor Interface) or SPI, and the third interface may be SPI or MIPI. In other embodiments of the present application, the display unit 40 may also be provided with a two-way SPI, which is electrically connected to the master control unit 10 and the slave control unit 20 respectively, or a SPI is provided to connect the master control unit 10 and the slave control unit through a switch. Switching between 20, the above two methods can achieve data transmission and / or display control of the display unit 40 by the master control unit 10 and the slave control unit 20. In this embodiment, the display unit 40 may include a display screen and a processor. One end of the processor is connected to the display screen, and the other end is electrically connected to the master control unit 10 and / or the slave control unit 20.

The slave control unit 20 and the display unit 40 are connected through the third interface, so that when the master control unit 10 is powered off and the slave control unit 20 works independently, the user can still interact with the smart watch through the display unit 40.

In this application, the logic OR gate circuit 31 is provided with two power supply circuits, which are from the power output terminal 11 of the power supply circuit of the main control unit 10 to the power access terminal 36 of the logic OR gate 31 and the output terminal of the power management unit 30. VOUT is connected to the power supply terminal 36 of the logic OR gate 31. When the logic OR gate 31 is powered by the power supply circuit of the main control unit 10, or the logic OR gate 31 is powered by the power management circuit 30, the current of the corresponding power supply circuit may flow to another power supply circuit, which is easy to A power supply of a power supply circuit has an adverse effect, and ultimately affects the normal power supply of the logic OR gate circuit 31.

Therefore, in order to effectively isolate the two power supply circuits of the logic OR gate circuit 31 and prevent serial electrical interference between the two, a first diode 37 and a second diode 34 are provided in this embodiment. The first diode 37 is disposed between the power output terminal 11 of the power supply circuit of the main control unit 10 and the power access terminal 36 of the logic OR circuit 31. Specifically, the anode of the first diode 37 is electrically connected to the power output terminal 11 of the main control unit 10 (as shown by the dashed line in FIG. 2), and the anode of the first diode 37 is connected to the The power supply access terminal 36 of the logical OR circuit 31 is electrically connected. The second diode 34 is disposed between the output terminal VOUT of the power management circuit 30 and the power access terminal 36 of the logic OR circuit 31. Specifically, the anode of the second diode 34 is electrically connected to the output terminal VOUT of the power management circuit 30 (as shown by the dashed line in FIG. 2), and the anode of the second diode 34 is connected to the logic. The power access terminal 36 of the OR circuit 31 is electrically connected. This embodiment uses a characteristic that a diode allows current to flow in only one direction, and can effectively prevent crosstalk between two power supply circuits of the logic OR gate circuit 31.

Further, the smart watch according to this embodiment further includes a startup circuit 50. One end of the startup circuit 50 is grounded, and the other non-grounded end is connected to the main control unit 10 through a first key pin 51, and is connected to the main control unit 10. A second key pin 52 is connected to the slave control unit 20. In addition, the startup circuit 50 further includes a startup button 53. The startup button 53 is used to control the grounding state of the startup circuit 50. When the start button 53 is pressed, the start circuit 50 is in a grounded state. At this time, the first key pin 51 and the second key pin 52 are in a low state. The first key pin 51 or the second key pin 52 changes from a high state to a low state, and can be used as a trigger signal for a key event, which can trigger a signal interruption of the master control unit 10 or the slave control unit 20 , Thereby informing the master control unit 10 or the slave control unit 20 to perform related control operations.

Of course, in this embodiment, the first key pin 51 provided in the master control unit 10 and the second key pin 52 provided in the slave control unit 20 are provided with corresponding pull-up resistors. The first key pin 51 and the second key pin 52 are kept in a high-level state without a key event. Those skilled in the art should understand that the setting method and specific function of the pull-up resistor can refer to any technology well known in the art, and will not be described in detail here.

Since the master control unit 10 and the slave control unit 20 jointly respond to the start button 53 in this embodiment, when the smart watch is in the off state, after long pressing the start button 53, the main control unit 10 is powered on first, and after the main control unit 10 is powered on The control power management unit 30 supplies power to the slave control unit 20 so that the slave control unit 20 is in a power-on state. In this way, when the main control unit 10 is powered on, the slave control unit 20 may not be powered on. Therefore, the status of the GPIO (General Purpose Input / Output) of the slave control unit 20 connected to the start button 53 is uncertain. , And may in turn easily affect the normal operation of the main control unit 10.

For this reason, in this embodiment, a switching circuit 54 is further provided between the non-ground terminal of the starting circuit 50 and the second key pin 52. The switching circuit 54 may include, for example, NMOS (N-channel metal oxide semiconductor icon) )tube. As shown in FIG. 2, the gate of the NMOS tube 54 is electrically connected to the non-ground terminal of the startup circuit 50, the drain of the NMOS tube 54 is electrically connected to the second key pin 52, and the NMOS The source of the tube 54 is grounded. In this embodiment, the switch circuit 54 provided between the start button 53 and the second key pin 52 can enable the smart watch to enter the startup state, especially when the main control unit 10 is powered on and the slave control unit 20 has not been powered on yet. When power is on, the current between the first key pin 51 in the master control unit 10 and the second key pin 52 in the slave control unit 20 is effectively isolated, thereby ensuring the input and output stability of the startup circuit 50.

In addition, in this embodiment, the startup circuit 50 generally maintains an electrical connection state with only one of the first key pin 51 and the second key pin 52, so that the master control unit 10 or the slave control unit 20 can independently respond to a key Event trigger signal, so as not to cause confusion in response to key event trigger signal.

The power supply circuit of the main control unit 10 may be a circuit that supplies power to the main control unit 10 outside the main control unit 10, or may be a power supply circuit located inside the main control unit 10. The embodiment of the present application uses the The power supply circuit is described inside the main control unit 10. When the main control unit 10 is controlled to be powered on, for example, after the start button 53 is pressed, the power supply circuit (not shown in the figure) starts to work, and supplies power to the main control unit 10 and also supplies power to the logic OR circuit 31.

Based on the smart watch of the above embodiment, other embodiments of the present application further include a method for switching modes of a smart watch. This embodiment controls the energy consumption of the smart watch by dividing the watch mode and the power-off state of the main control unit in the low energy consumption mode. Specifically, this embodiment divides the smart watch into a shutdown mode, an operation mode, and a watch mode according to different application scenarios of the smart watch. In the running mode, the smart watch can run various data receiving, processing, and display functions, including the main control unit responsible for processing energy-intensive tasks such as displaying maps and calculating real-time parameters, and the slave control unit for processing low-energy tasks such as sensor data. Task. When in the watch mode, the smart watch is responsible for processing the sensor data through the slave control unit and controlling the display unit to display the time and / or date. It can be seen that in the watch mode, the main control unit is in a power-off state, thereby saving part of the energy consumption generated by the main control unit of the smart watch in the watch mode.

Please refer to FIG. 3A, which is a flowchart of a method for switching modes of a smart watch according to an embodiment of the present application. With reference to FIG. 1A, it can be seen from FIG. 3A that the method includes the following steps:

Step AS100: The master control unit 10 outputs a high-level signal to the enable terminal 35 of the power management unit 30 in response to receiving a trigger instruction for switching from the shutdown mode to the operation mode, so that the power management unit 30 sends a slave control unit 20 Output power supply voltage.

In this embodiment, the trigger instruction for switching from the shutdown mode to the operation mode may specifically be a trigger signal for a key event generated by a user long-pressing the start button. Under normal circumstances, in order to avoid misoperation, the long pressing of the start button is generally not less than 3 seconds. When the smart watch is in the shutdown mode, the master control unit 10 and the slave control unit 20 are both powered off. In order to provide an effective power supply voltage for the slave control unit 20, after the user long presses the start button, the master control unit 10 The power supply circuit (not shown in FIG. 1A) first enters the power-on state. When the enable terminal 35 of the power management unit 30 receives a high-level signal output from the main control unit 10, it can output a voltage to the slave The control unit 20 supplies power so that the slave control unit 20 is in a power-on state.

Step AS200: The main control unit 10 controls the output of the high-level signal from the control unit 20 to the enable terminal 35 of the power management unit 30 through the first interface in response to receiving the trigger instruction for switching from the operation mode to the watch mode, and receives the After the first confirmation command fed back from the control unit 20, the power supply circuit of the main control unit 10 is turned off.

In addition, the smart watch's display screen can set mode options, which can include running mode, watch mode, and shutdown mode. In the running mode, call up the mode options and select the watch mode among them to issue the switch from the running mode to Watch mode trigger command. Of course, in other embodiments, the trigger command for switching from the operating mode to the watch mode can also be implemented by setting a start button. It should be noted that the pressing time of the start button in this scenario should be the same as the time when the smart watch is turned on (that is, the smart watch is turned off by the mode). Enter the operation mode).

In this embodiment, when the smart watch enters the watch mode, in order to avoid power consumption as much as possible, the master control unit 10 needs to be powered off without affecting the normal operation of the slave control unit 20. The power management unit 30 has two enabling control signal input circuits. When any one of the two enabling control signal input circuits inputs a high-level signal, the power management unit 30 can output voltage to supply power to the slave control unit 20. Because the power management unit 30 and the slave control unit 20 are both powered on in the running mode, and the master control unit 10 is powered off in the watch mode, that is, the enable control signal output by the master control unit 10 is low signal. In order to ensure the normal power supply of the slave control unit 20, before the master control unit 10 is powered off, the enable control signal input terminal (also referred to as the enable terminal or enable input above) of the slave control unit 20 to the power management unit 30 is required. Terminal) to output a high-level signal, so as to maintain the output of a high-level signal to the enable terminal 35 of the power management unit 30, so that the power management unit 30 continues to supply voltage to the slave control unit 20 and itself. At this time, the power-on and power-off states of the master control unit 10 will no longer affect the power-on state of the slave control unit 20, so after the master control unit 10 receives the first confirmation instruction sent from the control unit 20, it can control Its power supply circuit enters a closed state and stops supplying power to the main control unit 10. In this embodiment, the first confirmation instruction is used to indicate the completion status of the slave control unit 20 sending a high-level signal to the enable terminal 35 of the power management unit 30, so as to prevent the master control unit 10 from suddenly powering off and affecting the normality of the slave control unit 20 run.

Please refer to FIG. 3B, which is a flowchart of a method for switching modes of a smart watch according to an embodiment of the present application. With reference to FIG. 1B, it can be seen from FIG. 3B that the method includes the following steps:

Step BS100: The main control unit 10 supplies power to the enable control unit 60 in response to receiving a trigger instruction to switch from the shutdown mode to the operation mode, and outputs a high-level signal to the input terminal 61 of the enable control unit 60 so that The power supply management unit 30 outputs a power supply voltage to the slave control unit 20.

In this embodiment, the specific description of the trigger instruction for switching from the shutdown mode to the operation mode can refer to the foregoing description, and will not be repeated here. When the smart watch is in the shutdown mode, the master control unit 10 and the slave control unit 20 are both powered off. In order to provide an effective power supply voltage for the slave control unit 20, after the user long presses the start button, the master control unit 10 The power supply circuit (not shown in FIG. 1B) first enters a power-on state and provides power to the enable control unit 60 to enable the enable control unit 60 to be in a power-on state. In this way, in response to receiving the high-level signal output from the main control unit 10 at the input terminal 61, the enable control unit 60 may output an enable signal to the enable terminal 35 of the power management unit 30, so that the power management unit 30 outputs a voltage to The slave control unit 20 makes the slave control unit 20 be in a power-on state.

Step BS200: The main control unit 10 controls the output of a high-level signal from the control unit 20 to the input terminal 61 of the enable control unit 60 through the first interface in response to receiving a trigger instruction for switching from the operation mode to the watch mode, and receives the After the first confirmation command fed back from the control unit 20, the power supply circuit of the main control unit 10 is turned off.

For the specific operation of the mode switching of the smart watch, please refer to the foregoing, which will not be repeated here.

In this embodiment, when the smart watch enters the watch mode, in order to avoid power consumption as much as possible, the master control unit 10 needs to be powered off without affecting the normal operation of the slave control unit 20. The enable control unit 60 has two control signal input circuits and two power supply access circuits. When the power supply voltage signal is input to any of the two power supply access circuits, the enable control unit 60 can be in a power-on state. Similarly, when any one of the two control signal input circuits inputs a high-level signal, the enable control unit 60 can output an enable signal for enabling the power management unit 30. Since the power management unit 30 and the slave control unit 20 need to be powered on in both the operation mode and the watch mode, and the master control unit 10 is in the power off state in the watch mode, that is, the output of the master control unit 10 in the watch mode The control signal is a low-level signal. Therefore, when switching from the running mode to the watch mode, in order to ensure the normal power supply of the slave control unit 20, before the master control unit 10 is powered off, the slave control unit 20 needs to output high power to the input 61 of the enable control unit 60. The signal is leveled to maintain the output of the enable signal from the output terminal 62 of the enable control unit 60 to the power management unit 30, so that the power management unit 30 continues to supply voltage to the slave control unit 20 and itself. At this time, the power-on and power-off states of the main control unit 10 will no longer affect the power-on states of the enabled control unit 60 and the slave control unit 20, so when the main control unit 10 receives the first acknowledgement sent from the control unit After the instruction, the power supply circuit can be controlled to enter the off state, and the power supply to the main control unit 10 can be stopped. In this embodiment, the first confirmation instruction is used to instruct the slave control unit 20 to send a high-level signal to the input terminal 61 of the enable control unit 60 to prevent the master control unit from suddenly powering off and affecting the normal operation of the slave control unit.

In step BS300, the power management unit 30 supplies power to the enable control unit 60.

After the main control unit 10 is powered off, the power management unit 30 continues to supply power to the enable control unit 60 to prevent the enable control unit 60 from turning off and not working.

Please refer to FIG. 4A, which is a flowchart of another mode switching method for a smart watch according to an embodiment of the present application. With reference to FIG. 2 and FIG. 3A, it can be seen from FIG. 4A that after step AS100, the method further includes the following steps:

Step AS110: the main control unit 10 controls the display unit 40 through a second interface;

Step AS120: The master control unit 10 sends a prohibition instruction to the slave control unit 20 through the first interface. The prohibition instruction is used to prohibit the slave control unit 20 from responding to a trigger signal input from the startup circuit 50 and to disable a third interface between the slave control unit 20 and the display unit 40.

When the smart watch is in the running mode, the master control unit 10 and the slave control unit 20 are in the running state at the same time. In order to avoid confusion of the command response, the display unit 40 can be controlled only by the master control unit 10 by disabling the third interface. To display a task interface related to the main control unit 10. In addition, the response of the slave control unit 20 to the trigger signal can also be restricted by disabling the second key pin 52. In other words, at this time, only the main control unit 10 can respond to the trigger signal through the first key pin 51. When the smart watch is in the running mode, long press the start button to control the main control unit 10 to be turned on and off.

In addition, in other embodiments of the present application, in response to receiving a trigger instruction to switch from the operating mode to the watch mode, the master control unit 10 needs to hand over the control authority of the display unit 40 and the corresponding authority of the startup circuit 50 to the slave control unit 20. Specifically, the master control unit 10 may send an enable instruction to the slave control unit 20 through the first interface, and the enable instruction is used to allow the slave control unit 20 to respond to a trigger signal input by the startup circuit 50 and enable the slave A third interface between the control unit 20 and the display unit 40. After that, in response to receiving the first confirmation instruction fed back from the control unit 20, the main control unit 10 turns off the power supply circuit of the main control unit 10. In the watch mode, a short press (for example, about 1 second) of the start button is used to trigger the on and off of the control of the display unit 40 from the control unit 20. When the display unit 40 is turned on, only the current time data such as time and date are displayed, while satisfying the basic needs of the user, saving energy consumption of the smart watch as much as possible.

When the smart watch is powered off in the running mode, the slave control unit 20 can be turned off first, and then the main control unit 10 can be turned off. The specific methods include:

Step AS300: The main control unit 10 controls the slave control unit 20 to output a low-level signal to the enable terminal 35 of the power management unit 30 through the first interface in response to receiving a trigger instruction for switching from the operating mode to the shutdown mode. .

Step AS400: The master control unit 10 outputs a low-level signal to the enable terminal 35 of the power management unit 30 in response to receiving the second confirmation instruction fed back by the slave control unit, and turns off the power supply circuit of the master control unit 10 .

When both inputs of the enable terminal 35 of the power management unit 30 are low-level signals, the power management unit 30 cannot provide a power supply voltage to the slave control unit 20, and the slave control unit 20 is naturally turned off. When the power supply circuit of the main control unit 10 is turned off, the main control unit 10 is turned off, and the power management unit 30 is turned off by itself. Of course, before the power supply circuit of the main control unit 10 is turned off, the power output terminal of the main control unit 10 may be controlled to output a low-level signal so as to turn off the main control unit 10 after the power management unit 30 is turned off.

The smart watch involved in this application may also enter the shutdown mode in the watch mode. Specifically, a low-level signal may be output from the control unit 20 to the enable control signal input terminal of the power management unit 30 through a start button.

Please refer to FIG. 4B, which shows a flowchart of another method for switching modes of a smart watch according to an embodiment of the present application. With reference to FIG. 1B and FIG. 2, it can be seen from FIG. 4B that after step BS100, the method further includes the following steps:

Step BS110: the main control unit 10 controls the display unit 40 through the second interface;

Step BS120: The master control unit 10 sends a prohibition instruction to the slave control unit 20 through the first interface. The prohibition instruction is used to prohibit the slave control unit 20 from responding to a trigger signal input from the startup circuit 50 and to disable a third interface between the slave control unit 20 and the display unit 40.

When the smart watch is in the running mode, the master control unit 10 and the slave control unit 20 are in the running state at the same time. In order to avoid confusion of the command response, the third interface may be disabled. For related operations, please refer to the foregoing, and will not be described here.

In addition, in other embodiments of the present application, in response to receiving a trigger instruction to switch from the operating mode to the watch mode, the master control unit 10 needs to hand over the control authority of the display unit 40 and the corresponding authority of the startup circuit 50 to the slave control unit 20. For related operations, please refer to the foregoing, and will not be repeated here.

Step BS400: The master control unit 10 controls the slave control unit 20 to output a low-level signal to the input terminal of the enable control unit 60 through the first interface in response to receiving a trigger instruction for switching from the operation mode to the shutdown mode.

Step BS500: The master control unit outputs a low-level signal to the input terminal of the enable control unit 60 in response to receiving the second confirmation instruction fed back by the slave control unit 20.

Step BS600: Turn off the power supply circuit of the main control unit 10.

When both inputs of the input terminal 61 of the enable control unit 60 are low-level signals, the enable control unit 60 will not be able to enable the power management unit 30, and thus cannot provide the power supply voltage for the slave control unit 20, and the slave control unit 20 closed naturally. When the power supply circuit of the main control unit 10 is turned off, the main control unit 10 is turned off, and the enable control unit 60 is turned off by itself. Of course, before the power supply circuit of the main control unit 10 is turned off, the control signal output terminal of the main control unit 10 may be controlled to output a low-level signal, so that the enable control unit is turned off before the main control unit is turned off.

The smart watch involved in this application may also enter the shutdown mode in the watch mode. Specifically, a low-level signal may be output from the control unit 20 to the control signal input terminal 61 of the enable control unit 60 through a start button.

Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the device or system embodiment, since it is basically similar to the method embodiment, it is described relatively simply. For the relevant part, refer to the description of the method embodiment. The embodiments of the device and system described above are merely schematic, in which the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, may be located in one place, or Distributed across multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the objective of the solution of this embodiment. Those of ordinary skill in the art can understand and implement without creative efforts.

The above are only specific implementations of the present application. It should be noted that, for those of ordinary skill in the art, without departing from the principles of the present application, several improvements and retouches can be made. The scope of protection of this application.

Claims

A smart watch includes:

Main control unit

A slave control unit connected to the master control unit via a first interface; and

Power management unit with:

The enabling terminal is connected to both the control signal output terminal of the master control unit and the control signal output terminal of the slave control unit; and

The voltage output terminal is electrically connected with the power access terminal of the slave control unit,

Wherein, the master control unit is configured to control the slave control unit to output high to the enable terminal of the power management unit through the first interface before the power supply circuit of the master control unit is turned off. Level signal

The power management unit is configured to output a power voltage from the voltage output terminal of the power management unit in response to receiving the high-level signal at the enable terminal of the power management unit.
The smart watch according to claim 1, further comprising an enable control unit having:

The enable signal output terminal is connected to the enable terminal of the power management unit;

A first control signal input terminal connected to a control signal output terminal of the main control unit; and

A second control signal input terminal connected to a control signal output terminal of the slave control unit,

Wherein, the enable control unit is configured to, in response to receiving the high-level signal at the first control signal input terminal and / or the second control signal input terminal, from the enable control unit The enable signal output terminal outputs an enable signal;

The master control unit is configured to control the slave control unit to the second control signal input terminal of the enable control unit through the first interface before a power supply circuit of the master control unit is turned off. Outputting the high-level signal;

The power management unit is configured to output a power voltage from the voltage output terminal of the power management unit in response to receiving the enable signal at the enable terminal of the power management unit.
The smart watch according to claim 2, wherein the power supply circuit of the main control unit and the power management unit are capable of supplying power to the enable control unit.
The smart watch according to claim 3, wherein the enabling control unit further comprises:

A first power supply access terminal connected to a power output terminal of a power supply circuit of the main control unit; and

The second power supply access terminal is connected to the voltage output terminal of the power management unit.
The smart watch according to claim 4, wherein the enabling control unit further comprises:

A first diode whose positive electrode is electrically connected to a power output terminal of a power supply circuit of the main control unit, and the negative electrode is electrically connected to the first power supply access terminal;

The second diode has a positive electrode electrically connected to the voltage output terminal of the power management unit, and a negative electrode electrically connected to the second power supply access terminal.
The smart watch according to claim 2, wherein the enabling control unit comprises a logic OR gate circuit, wherein,

A first input terminal of the logic OR gate circuit is the first control signal input terminal of the enable control unit,

A second input terminal of the logic OR gate circuit is the second control signal input terminal of the enable control unit,

An output terminal of the logical OR gate circuit is the enable signal output terminal of the enable control unit.
The smart watch according to claim 6, characterized in that a power access terminal of the logical OR circuit, a power output terminal of a power supply circuit of the main control unit, and the voltage output terminal of the power management unit Both are connected.
The smart watch according to claim 7, wherein the enabling control unit further comprises:

A first diode whose positive electrode is electrically connected to a power output terminal of a power supply circuit of the main control unit, and the negative electrode is electrically connected to a power access terminal of the logic OR gate circuit;

The second diode has a positive electrode electrically connected to the voltage output terminal of the power management unit, and a negative electrode electrically connected to a power input terminal of the logic OR gate circuit.
The smart watch according to any one of claims 1 to 8, further comprising a display unit, wherein:

The display unit is electrically connected to the main control unit through a second interface;

The display unit is electrically connected to the slave control unit through a third interface.
The smart watch according to any one of claims 1 to 9, further comprising a startup circuit having:

Ground terminal,

A non-ground terminal, which is connected to the master control unit through a first key pin and to the slave control unit through a second key pin, and

A start button, the start button is used to control the ground state of the start circuit.
The smart watch according to claim 10, wherein a switch circuit is provided between the non-ground terminal of the startup circuit and the second key pin.
The smart watch according to claim 11, wherein the switch circuit is an NMOS tube,

The gate of the NMOS tube is electrically connected to the non-ground terminal of the startup circuit,

The drain of the NMOS tube is electrically connected to the second key pin,

The source of the NMOS tube is grounded.
A smart watch mode switching method includes:

The main control unit of the smart watch is in response to receiving a trigger instruction to switch from the shutdown mode to the running mode, and outputs a high-level signal to the enable end of the power management unit of the smart watch, so that the power management unit sends a high-level signal to Outputting a power supply voltage from a control unit of the smart watch;

In response to receiving a trigger instruction for switching from the operating mode to the watch mode, the master control unit controls the slave control unit to output the high-level signal to the enable terminal of the power management unit through a first interface, After receiving the first confirmation instruction fed back from the slave control unit, the power supply circuit of the master control unit is turned off.
The method according to claim 13, further comprising, in response to receiving a trigger instruction for switching from the operation mode to the shutdown mode,

The master control unit controls the slave control unit to output a low-level signal to the enable terminal of the power management unit through the first interface;

After receiving the second confirmation instruction fed back by the slave control unit, the master control unit outputs the low-level signal to the enable terminal of the power management unit;

The main control unit turns off the power supply circuit of the main control unit.
The method according to claim 14, wherein the smart watch further comprises an enabling control unit,

The main control unit outputting the high-level signal to an enable terminal of the power management unit includes:

The power supply circuit of the main control unit supplies power to the enable control unit, and outputs the high-level signal to a first control signal input terminal of the enable control unit, so that the enable control unit is enabled The power management unit outputs a power voltage;

The outputting the high-level signal from the control unit to an enable end of the power management unit includes:

The slave control unit outputs the high-level signal to a second control signal input terminal of the enable control unit, so that the enable control unit keeps enabling the power management unit to output a power supply voltage.
The method according to claim 15, wherein:

The outputting the low-level signal from the control unit to the enable terminal of the power management unit includes:

The slave control unit outputs the low-level signal to the second control signal input terminal of the enable control unit;

The main control unit outputting the low-level signal to the enable terminal of the power management unit includes:

The main control unit outputs the low-level signal to the first control signal input terminal of the enable control unit.
The method according to any one of claims 13 to 16, wherein after the main control unit receives a trigger instruction to switch from a shutdown mode to an operating mode, the method further comprises:

The main control unit controls a display unit of the smart watch through a second interface;

The master control unit sends a prohibition instruction to the slave control unit through the first interface to prohibit the slave control unit from responding to a trigger signal input from a startup circuit of the smart watch, and to disable the slave control unit and all The third interface between the display units is described.
The method according to claim 17, wherein after the main control unit receives a trigger instruction for switching from the operating mode to the watch mode, and before closing the power supply circuit of the main control unit, the method further comprises:

The master control unit sends an enable instruction to the slave control unit through the first interface to allow the slave control unit to respond to a trigger signal input by the startup circuit, and enable the slave control unit and the display unit. Between said third interface.