Low power device for a mouse

Abstract

The utility model discloses a low power consumption device for mouse provides accurate matching working voltage through multichannel voltage conversion submodule in power management module, and combines the independent time-sharing control of each submodule power supply in sensor module, user input module to the multiple MOSFET switch pipe of power path control submodule realizes, and the static power consumption is reduced greatly, adopts the nRF54L15 main control chip of ultralow power consumption and CH32V305 auxiliary MCU chip architecture, and the cooperation processing is carried out through UART interface, and the task of high real -time requirement is handled by CH32V305 auxiliary MCU chip, so that nRF54L15 main control chip can long -term be in deep sleep mode, and only when the motion interruption of being PAW3950 optical sensor or user operation wakes up quick response, the wireless communication module of nRF54L15 main control chip internal integration supports bluetooth 5.4 and 2.4GHz dual mode wireless communication adopts low duty cycle working mode, and wireless transmission power consumption is further reduced.

Description

Technical Field

[0001] This utility model relates to the field of electrical structure technology, and in particular to a low-power device for a mouse. Background Technology

[0002] Current mice generally come in wireless and wired versions. However, during mouse use, they need to remain in standby mode for extended periods to meet the user's immediate clicking needs. This characteristic results in relatively high power consumption, especially for wireless mice, which rely entirely on batteries for power. When mouse power consumption is high, problems arise such as short battery life and unresponsive clicking due to low battery. Summary of the Invention

[0003] In view of this, the purpose of this utility model is to provide a low-power device for a mouse.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0005] A low-power device for a mouse includes a power management module, a main control module, a sensor module, a user input module, and a wireless communication module. The power management module includes a lithium battery charging management submodule, a multi-channel voltage conversion submodule, and a power path control submodule. The power path control submodule includes multiple MOSFET switches, each independently controlling the power supply to the sensor module and the user input module. The main control module includes an nRF54L15 main control chip, a CH32V305 auxiliary MCU chip, and a UART interface. The nRF54L15 main control chip and the CH32V305 auxiliary MCU chip are connected. The auxiliary MCU chip is connected via a UART interface. The nRF54L15 main control chip includes multiple configurable GPIO pins for detecting user input events and controlling the power enable signals of each module. The sensor module includes a PAW3950 optical sensor, which is connected to the main control module via an SPI interface. The user input module includes a mechanical button submodule, a roller encoder submodule, and an RGB indicator submodule. The wireless communication module is configured to be integrated into the nRF54L15 main control chip and supports Bluetooth 5.4 and 2.4GHz dual-mode wireless communication.

[0006] In some embodiments, a 32kHz low-speed crystal oscillator circuit is also included. The 32.768kHz low-speed crystal oscillator circuit is connected to the P1.00 / XL1 and P1.01 / XL2 pins of the nRF54L15 main control chip and is used to maintain the real-time clock function in the deep sleep state of the main control module.

[0007] In some embodiments, the multi-channel voltage conversion submodule includes a first voltage conversion unit and a second voltage conversion unit. The first voltage conversion unit is configured as an RS3236-ADJ8YF5 low-dropout linear regulator, used to convert the lithium battery voltage into a first operating voltage of 3.24V, which is used to power the nRF54L15 main control chip. The second voltage conversion unit is configured as an ETA3426 synchronous buck converter, used to convert the USB input voltage or lithium battery voltage into a second operating voltage of 3.3V, which is used to power the CH32V305 auxiliary MCU chip and the user input module. Both the first and second voltage conversion units are enabled by the V3.3_EN signal on the GPIO pin of the nRF54L15 main control chip.

[0008] In some embodiments, multiple MOSFET switches are configured to include AO3400 and AO3401A MOSFETs; the multiple MOSFET switches are controlled by the GPIO pins of the nRF54L15 main control chip to independently switch the power supply paths of USB power and lithium battery power; one MOSFET switch Q5 is used to control the charging enable of the lithium battery charging management submodule, and the other two MOSFET switches Q6 and Q7 are used to control the input power selection of each voltage conversion unit.

[0009] In some embodiments, the lithium battery charging management submodule includes a TP4056E lithium battery charging management chip, a temperature detection circuit, and a charging status indication circuit. The PROG pin of the TP4056E lithium battery charging management chip is grounded through a 6.2kΩ precision resistor and configured with a charging current of 177mA. The temperature detection circuit includes a thermistor NTC_BAT, which is connected to the TEMP pin of the TP4056E chip for monitoring the lithium battery temperature. The charging status indication circuit outputs a charging status signal to the nRF54L15 main control chip through the CHRG and DONE pins of the TP4056E lithium battery charging management chip.

[0010] In some embodiments, the user input module further includes a mechanical key input circuit, a roller encoder circuit, and an RGB indicator light driving circuit. The mechanical key input circuit includes multiple mechanical key switches, and the key signals of the mechanical key switches are connected to the GPIO pins of the nRF54L15 main control chip through pull-up resistors. The roller encoder circuit is configured as a quadrature encoder and is used to output two signals with a 90-degree phase difference to the GPIO pins of the nRF54L15 main control chip. The RGB indicator light driving circuit includes a Q1 switch, a Q2 switch, and a Q3 switch. The Q1 switch is used to control the conduction of the R-LED channel, the Q2 switch is used to control the conduction of the G-LED channel, and the Q3 switch is used to control the conduction of the B-LED channel. The gates of the Q1, Q2, and Q3 switches are controlled by the GPIO pins of the nRF54L15 main control chip.

[0011] In some embodiments, the P1.04 / AIN0 to P1.07 / AIN3 pins of the nRF54L15 main control chip are configured as ADC input channels for acquiring lithium battery voltage signals and sensor module operating status signals; the P0.00 to P0.04 general-purpose I / O pins of the nRF54L15 main control chip are respectively connected to the left, right, middle, forward, and back buttons of the mouse for detecting user input events.

[0012] In some embodiments, the MOTION pin of the PAW3950 optical sensor is connected to the P1.08 pin of the nRF54L15 main control chip, and is used to generate a hardware interrupt signal to wake up the main control module when mouse movement is detected; the PAW3950 optical sensor communicates with the nRF54L15 main control chip through the SPI bus, which includes four signal lines: NCS, SCLK, MOSI, and MISO, which are respectively connected to the corresponding GPIO pins of the nRF54L15 main control chip.

[0013] In some embodiments, a TYPE-C interface circuit is also included. The TYPE-C interface circuit includes a CC1 pin configuration circuit and a CC2 pin configuration circuit. The CC1 pin configuration circuit is connected to the USB_DN data line through a 2.2Ω resistor, and the CC2 pin configuration circuit is connected to the USB_DP data line through a 2.2Ω resistor. The VBUS pin of the TYPE-C interface generates a VBUS_5V voltage after passing through a TPAZ5125-01H overvoltage protection chip, which is used to provide input power.

[0014] In some embodiments, the wireless communication module further includes an RF matching network circuit, which is connected between the RF output pin of the nRF54L15 main control chip and the antenna; the RF matching network circuit includes a 2.7nH inductor L2, a 3.5nH inductor L3, a 3.5nH inductor L4, a 1.5pF capacitor C6, a 2.0pF capacitor C9, and a 3.9pF capacitor C13, for achieving 50Ω impedance matching.

[0015] By adopting the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0016] Unlike existing technologies, the above solution provides precisely matched operating voltages to different modules through a multi-channel voltage conversion submodule in the power management module. Combined with multiple MOSFET switches in the power path control submodule, it achieves independent time-sharing control of power supply to each submodule in the sensor module and user input module, significantly reducing static power consumption. It employs an ultra-low-power nRF54L15 main control chip and a CH32V305 auxiliary MCU chip architecture, using a UART interface for collaborative processing. The CH32V305 auxiliary MCU chip handles tasks with high real-time requirements, allowing the nRF54L15 main control chip to remain in deep sleep mode for extended periods, responding quickly only when interrupted by the PAW3950 optical sensor's motion or awakened by user operation. The wireless communication module integrated within the nRF54L15 main control chip, supporting Bluetooth 5.4 and 2.4GHz dual-mode wireless communication, operates with a low duty cycle, further reducing wireless transmission power consumption. This solution, through a multi-layered, refined power management mechanism, enables the mouse to maintain instant responsiveness while significantly reducing overall power consumption, effectively solving the problems of short battery life and unresponsive operation caused by low battery in wireless mice. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the nRF54L15 main control chip and wireless communication module for a low-power mouse device.

[0019] Figure 2 This is a schematic diagram of the CH32V305 auxiliary MCU chip for low-power devices used in mice.

[0020] Figure 3This is a schematic diagram of a sensor module for a low-power mouse.

[0021] Figure 4 This is a schematic diagram of the lithium battery charging management submodule for a low-power mouse device.

[0022] Figure 5 This is a schematic diagram of the first voltage conversion unit of a low-power device for a mouse.

[0023] Figure 6 This is a schematic diagram of the second voltage conversion unit of a low-power device for a mouse.

[0024] Figure 7 This is a schematic diagram of the power path control submodule for a low-power device used in a mouse.

[0025] Figure 8 This is a schematic diagram of the TYPE-C interface circuit for a low-power mouse.

[0026] Figure 9 This is a schematic diagram of the user input module for a low-power mouse device. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are only for illustrating the present invention and do not limit the scope of the present invention. Similarly, the following embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0028] Please see Figures 1 to 9This embodiment provides a low-power device for a mouse, including a power management module, a main control module, a sensor module, a user input module, and a wireless communication module. The power management module includes a lithium battery charging management submodule, a multi-channel voltage conversion submodule, and a power path control submodule. The power path control submodule includes multiple MOSFET switches, each independently controlling the power supply to the sensor module and the user input module. The main control module includes an nRF54L15 main control chip, a CH32V305 auxiliary MCU chip, and a UART interface. The nRF54L15 main control chip and the CH32V305 auxiliary MCU chip are connected. The 2V305 auxiliary MCU chip is connected via a UART interface. The nRF54L15 main control chip includes multiple configurable GPIO pins for detecting user input events and controlling the power enable signals of each module. The sensor module includes a PAW3950 optical sensor, which is connected to the main control module via an SPI interface. The user input module includes a mechanical button submodule, a roller encoder submodule, and an RGB indicator light submodule. The wireless communication module is configured to be integrated into the nRF54L15 main control chip and supports Bluetooth 5.4 and 2.4GHz dual-mode wireless communication.

[0029] In this embodiment, the power management module is the foundation of energy consumption control. The lithium battery charging management submodule inside the power management module is used to manage the charging and discharging of the battery safely and efficiently. The multi-channel voltage conversion submodule provides stable and efficient power output for subsequent circuits with different operating voltages. The power path control submodule contains multiple MOSFET switches. The MOSFET switches act as electronic valves for the power supply circuits of each functional module. Their on / off state can be independently controlled by the main control chip, thereby completely cutting off the static power consumption of idle units.

[0030] The main control module adopts a dual-chip collaborative architecture. The nRF54L15 main control chip serves as the core, responsible for handling high-performance tasks, wireless communication, and overall power scheduling. Abundant configurable GPIO pins are used to detect user input events such as key presses in real time and issue a series of power enable signals. The CH32V305 auxiliary MCU chip is connected to the main chip through the UART interface and can share some tasks to allow the main chip to enter a deeper sleep state.

[0031] The core of the sensor module is the PAW3950 optical sensor, which exchanges motion data with the main controller via a high-speed SPI interface. The low-power characteristics and motion interruption wake-up function of the PAW3950 optical sensor further save power. The user input module includes a mechanical button submodule for triggering interaction, a roller encoder submodule for detecting scrolling operations, and an RGB indicator submodule for providing status feedback. In addition, the wireless communication module is directly integrated into the nRF54L15 main control chip, which supports Bluetooth 5.4 and 2.4GHz dual-mode wireless communication, reducing the number of external components and lowering communication-related power consumption.

[0032] During operation, the nRF54L15 main control chip monitors user operations and sensor data via GPIO pins. If no operation is detected, it controls multiple MOSFET switches to cut off power to non-essential units such as the sensor module and RGB indicator sub-module. Simultaneously, it can also work with the CH32V305 auxiliary MCU chip to enter a low-power sleep state, maintaining only basic monitoring functions until interrupted by user button presses, scroll wheel actions, or optical sensor movement, thus reawakening the device. This results in extremely low power consumption when idle, while allowing for rapid wake-up and full functionality when needed. The optimized chip and module combination maximizes battery life on a single charge while ensuring performance, enhancing product usability and user experience.

[0033] In this embodiment, the power path control submodule of the power management module uses multiple MOSFET switches to independently control the power supply of each functional module. The main control module adopts a dual-MCU architecture with an nRF54L15 main control chip and a CH32V305 auxiliary MCU chip working together through a UART interface. The sensor module uses a high-performance PAW3950 optical sensor and connects to the main control through an SPI interface. The user input module includes a mechanical button submodule, a roller encoder submodule, and an RGB indicator light submodule. The wireless communication module is integrated inside the nRF54L15 main control chip and supports Bluetooth 5.4 and 2.4GHz dual-mode wireless communication. This achieves reasonable allocation of hardware resources and fine-grained power consumption management, providing basic hardware support for the low-power operation of the device.

[0034] In some embodiments, a 32kHz low-speed crystal oscillator circuit is also included. This 32.768kHz low-speed crystal oscillator circuit is connected to the P1.00 / XL1 and P1.01 / XL2 pins of the nRF54L15 main control chip to maintain the real-time clock function during the main control module's deep sleep state. This embodiment, by adding a 32kHz low-speed crystal oscillator circuit and connecting it to the P1.00 / XL1 and P1.01 / XL2 pins of the nRF54L15 main control chip, provides a precise clock source required to maintain the real-time clock function during deep sleep. This allows the main control module to maintain its time base and timed wake-up function even in extremely low-power sleep mode, avoiding the additional power consumption associated with using a high-frequency crystal oscillator and significantly reducing the overall power consumption level of the system in standby mode.

[0035] Please see Figure 5 and Figure 6 In some embodiments, the multi-channel voltage conversion submodule includes a first voltage conversion unit and a second voltage conversion unit. The first voltage conversion unit is configured as an RS3236-ADJ8YF5 low-dropout linear regulator, used to convert the lithium battery voltage into a first operating voltage of 3.24V, which powers the nRF54L15 main control chip. The second voltage conversion unit is configured as an ETA3426 synchronous buck converter, used to convert the USB input voltage or lithium battery voltage into a second operating voltage of 3.3V, which powers the CH32V305 auxiliary MCU chip and the user input module. Both the first and second voltage conversion units are enabled by the V3.3_EN signal on the GPIO pin of the nRF54L15 main control chip.

[0036] In this embodiment, the first voltage conversion unit is configured as an RS3236-ADJ8YF5 low-dropout linear regulator, which converts the fluctuating lithium battery voltage into a stable and accurate first operating voltage of 3.24V. This voltage is specifically used to power the core circuit of the nRF54L15 main control chip, which is sensitive to power supply noise. The low-dropout characteristic ensures that it can still work efficiently when the battery voltage drops.

[0037] The second voltage conversion unit is configured as an ETA3426 synchronous buck converter, which converts the USB input voltage or lithium battery voltage to a second operating voltage of 3.3V to power the relatively power-hungry CH32V305 auxiliary MCU chip and the circuitry in the user input module. The synchronous buck architecture provides higher conversion efficiency. Crucially, these two voltage conversion units do not operate continuously; their operation is uniformly controlled by the GPIO pins of the nRF54L15 main control chip via the V3.3_EN signal. This allows the main chip to dynamically turn the power rails of the entire system on or off according to task requirements, thereby eliminating the static power consumption of the converters during standby and achieving energy management.

[0038] In this embodiment, the nRF54L15 main control chip controls the enabling of the two voltage conversion units via the V3.3_EN signal according to the operating status. Both units are enabled when full functionality is required, while the second voltage conversion unit, which powers the auxiliary MCU and user input, is disabled when only core wireless functions are needed, thus cutting off power consumption in this part of the circuit. This avoids energy waste caused by a single power path and ensures that each voltage conversion unit only operates when its load requires it. Preferably, the RS3236-ADJ8YF5 and ETA3426 chip combination provides low static power consumption and high conversion efficiency, respectively, which together significantly reduce the overall power consumption of the system in different operating modes and extend battery life.

[0039] In this embodiment, an RS3236-ADJ8YF5 low-dropout linear regulator is used as the first voltage conversion unit to provide a precise first operating voltage for the nRF54L15 main control chip. An ETA3426 synchronous buck converter is used as the second voltage conversion unit to provide a second operating voltage for the CH32V305 auxiliary MCU chip and the user input module. Both voltage conversion units are enabled by the V3.3_EN signal controlled by the GPIO pin of the nRF54L15 main control chip, realizing independent management and on-demand activation of the power supply voltage for different functional modules, effectively avoiding unnecessary power loss.

[0040] Please see Figure 7 In some embodiments, multiple MOSFET switches are configured to include AO3400 and AO3401A MOSFETs; the multiple MOSFET switches are controlled by the GPIO pins of the nRF54L15 main control chip to independently switch the power supply paths of USB power and lithium battery power; one MOSFET switch Q5 is used to control the charging enable of the lithium battery charging management submodule, and the other two MOSFET switches Q6 and Q7 are used to control the input power selection of each voltage conversion unit.

[0041] In this embodiment, the multiple MOSFET switches are preferably configured to include AO3400 and AO3401A MOSFETs, utilizing their low on-resistance and high switching speed to minimize power loss. The operation of these multiple MOSFET switches is not autonomous; rather, they are directly controlled by level signals emitted from the GPIO pins of the nRF54L15 main control chip. Their core function is to independently switch the power supply paths of the USB power and lithium battery power inputs, achieving seamless switching and isolation between the power supplies.

[0042] Specifically, one of the MOSFET switches, Q5, is used to control the charging enable of the lithium battery charging management submodule, and its on / off state determines whether charging current is allowed to flow into the battery; while the other two MOSFET switches, Q6 and Q7, are used to coordinate the selection of the input power supply for each voltage conversion unit, ensuring that when the USB power supply is plugged in, the USB power supply is used first and the battery is charged at the same time. When the USB power supply is unplugged, it automatically switches to lithium battery power supply. The whole process is smooth and shock-free.

[0043] This embodiment constructs a highly efficient and flexible intelligent power selection circuit using discrete MOSFETs. The nRF54L15 main control chip monitors the USB insertion status in real time and controls the on / off combinations of Q5, Q6, and Q7 via GPIO to intelligently select the power source and manage the charging process. For example, when USB insertion is detected, Q7 is turned on and Q6 is turned off, directing USB power to the system, while Q5 is turned on to enable charging. When USB is unplugged, Q6 is turned on and Q7 is turned off, switching the power path to the battery, and Q5 is turned off to stop charging. This embodiment achieves automatic and seamless power switching through hardware path management, ensuring a seamless user experience. It also completely eliminates the constant voltage drop losses associated with traditional diode solutions. The extremely low on-resistance of the preferred AO3400 and AO3401A MOSFETs further reduces energy waste in the switching path, significantly improving overall power utilization efficiency and extending battery life.

[0044] In this embodiment, AO3400 and AO3401A MOSFETs are used and directly controlled by the GPIO pins of the nRF54L15 main control chip. MOSFET switch Q5 is specifically used to control the charging enable of the lithium battery charging management submodule, while MOSFET switches Q6 and Q7 are responsible for controlling the switching of the input power of each voltage conversion unit between USB and lithium battery. This design realizes intelligent selection and complete shutdown of the power supply path, fundamentally eliminating the static current consumption in the power circuit.

[0045] Please see Figure 4In some embodiments, the lithium battery charging management submodule includes a TP4056E lithium battery charging management chip, a temperature detection circuit, and a charging status indication circuit. The PROG pin of the TP4056E lithium battery charging management chip is grounded through a 6.2kΩ precision resistor and configured with a charging current of 177mA. The temperature detection circuit includes a thermistor NTC_BAT, which is connected to the TEMP pin of the TP4056E chip for monitoring the lithium battery temperature. The charging status indication circuit outputs a charging status signal to the nRF54L15 main control chip through the CHRG and DONE pins of the TP4056E lithium battery charging management chip.

[0046] The lithium battery charging management submodule achieves safe and intelligent charging control through the integration of a dedicated chip and peripheral circuitry. The TP4056E lithium battery charging management chip is a complete linear charging management integrated circuit. Its PROG pin is grounded through a 6.2kΩ precision resistor. The precise value of this resistor is used to set the current during the constant current charging phase. In this embodiment, it is configured as a 177mA charging current, which achieves a good balance between charging speed and battery heat generation. To ensure the safety of the charging process, the lithium battery charging management submodule also includes a temperature detection circuit. The core component is a thermistor NTC_BAT. The thermistor NTC_BAT is mounted close to the battery and feeds back its resistance changes to the TEMP pin of the TP4056E chip, enabling the chip to monitor the lithium battery temperature in real time and automatically pause charging when the temperature is abnormal. In addition, the charging status indicator circuit directly utilizes the output characteristics of the CHRG and DONE pins of the TP4056E lithium battery charging management chip. These two pins will output different combinations of level signals to represent states such as charging in progress and charging complete. The charging status signal is transmitted to the nRF54L15 main control chip to provide the main control system with real-time information on the charging process, so as to provide human-machine interaction prompts or system power consumption management.

[0047] This embodiment uses the TP4056E lithium battery charging management chip and sets the optimized charging current by connecting an external precision resistor to its PROG pin. The thermistor NTC_BAT of the temperature detection circuit is connected to the TEMP pin to realize real-time monitoring of the lithium battery temperature. The charging status is fed back to the nRF54L15 main control chip through the CHRG and DONE pins of the charging status indicator circuit. The complete charging management system optimizes charging efficiency and reduces energy loss during the charging process while ensuring charging safety.

[0048] Please see Figure 9In some embodiments, the user input module further includes a mechanical button input circuit, a roller encoder circuit, and an RGB indicator light driving circuit. The mechanical button input circuit includes multiple mechanical button switches, and the button signals of the mechanical button switches are connected to the GPIO pins of the nRF54L15 main control chip through pull-up resistors. The roller encoder circuit is configured as a quadrature encoder, and the roller encoder circuit is used to output two signals with a 90-degree phase difference to the GPIO pins of the nRF54L15 main control chip. The RGB indicator light driving circuit includes a Q1 switch, a Q2 switch, and a Q3 switch. The Q1 switch is used to control the conduction of the R-LED channel, the Q2 switch is used to control the conduction of the G-LED channel, and the Q3 switch is used to control the conduction of the B-LED channel. The gates of the Q1, Q2, and Q3 switches are controlled by the GPIO pins of the nRF54L15 main control chip.

[0049] In this embodiment, the mechanical button input circuit connects the button signal to the GPIO pin of the nRF54L15 main control chip through a pull-up resistor. The roller encoder circuit uses a quadrature encoder to output two phase difference signals to the main control chip. The RGB indicator light driving circuit uses Q1, Q2, and Q3 switches to control the R / G / B LED channels respectively, and their gates are controlled by the GPIO of the main control chip. This allows all user input and indication functions to be completely powered off when not needed, greatly reducing the power consumption of the user interaction process.

[0050] In some embodiments, the P1.04 / AIN0 to P1.07 / AIN3 pins of the nRF54L15 main control chip are configured as ADC input channels for acquiring lithium battery voltage signals and sensor module operating status signals; the P0.00 to P0.04 general-purpose I / O pins of the nRF54L15 main control chip are respectively connected to the left, right, middle, forward, and back buttons of the mouse for detecting user input events.

[0051] In this embodiment, the P1.04 / AIN0 to P1.07 / AIN3 pins of the nRF54L15 main control chip are configured as ADC input channels for acquiring lithium battery voltage signals and sensor module operating status signals. The P0.00 to P0.04 general-purpose I / O pins are connected to the left, right, middle, forward, and back buttons of the mouse, respectively. This utilizes the chip's built-in analog and digital functions, reducing the number of external circuit components and lowering system complexity and power consumption.

[0052] Please see Figure 3In some embodiments, the MOTION pin of the PAW3950 optical sensor is connected to the P1.08 pin of the nRF54L15 main control chip to generate a hardware interrupt signal to wake up the main control module when mouse movement is detected; the PAW3950 optical sensor communicates with the nRF54L15 main control chip via an SPI bus, which includes four signal lines: NCS, SCLK, MOSI, and MISO, which are respectively connected to the corresponding GPIO pins of the nRF54L15 main control chip.

[0053] In this embodiment, the MOTION pin of the PAW3950 optical sensor is directly connected to the P1.08 pin of the nRF54L15 main control chip. The hardware interrupt signal is used to realize fast wake-up during motion detection. At the same time, data transmission is carried out through an independent SPI bus containing four signal lines: NCS, SCLK, MOSI, and MISO. The logic of interrupt wake-up plus dedicated communication channel greatly shortens the response time and activity time of the main control chip and reduces the power consumption of the motion detection function.

[0054] Please see Figure 8 In some embodiments, a TYPE-C interface circuit is also included. The TYPE-C interface circuit includes a CC1 pin configuration circuit and a CC2 pin configuration circuit. The CC1 pin configuration circuit is connected to the USB_DN data line through a 2.2Ω resistor, and the CC2 pin configuration circuit is connected to the USB_DP data line through a 2.2Ω resistor. The VBUS pin of the TYPE-C interface generates a VBUS_5V voltage after passing through a TPAZ5125-01H overvoltage protection chip, which is used to provide input power.

[0055] This embodiment achieves correct interface identification by including CC1 pin configuration circuits and CC2 pin configuration circuits and connecting the USB_DN and USB_DP data lines via resistors. The VBUS pin of the TYPE-C interface generates VBUS_5V voltage after passing through the TPAZ5125-01H overvoltage protection chip to provide reliable input power to the system. While ensuring the stability and safety of the USB connection, it provides an efficient power input path.

[0056] Please see Figure 1 In some embodiments, the wireless communication module further includes an RF matching network circuit connected between the RF output pin of the nRF54L15 main control chip and the antenna; the RF matching network circuit includes a 2.7nH inductor L2, a 3.5nH inductor L3, a 3.5nH inductor L4, a 1.5pF capacitor C6, a 2.0pF capacitor C9, and a 3.9pF capacitor C13, for achieving 50Ω impedance matching.

[0057] In this embodiment, the radio frequency matching network circuit is connected between the RF output pin of the nRF54L15 main control chip and the antenna. It includes components such as inductor L2, inductor L3, inductor L4, capacitor C6, capacitor C9 and capacitor C13. Through precise impedance matching, the transmission efficiency of radio frequency signals is optimized, which significantly improves the energy efficiency ratio of wireless communication and reduces the transmit power requirement of the wireless communication module while ensuring communication quality.

[0058] Unlike existing technologies, the above solution provides precisely matched operating voltages to different modules through a multi-channel voltage conversion submodule in the power management module. Combined with multiple MOSFET switches in the power path control submodule, it achieves independent time-sharing control of power supply to each submodule in the sensor module and user input module, significantly reducing static power consumption. It employs an ultra-low-power nRF54L15 main control chip and a CH32V305 auxiliary MCU chip architecture, using a UART interface for collaborative processing. The CH32V305 auxiliary MCU chip handles tasks with high real-time requirements, allowing the nRF54L15 main control chip to remain in deep sleep mode for extended periods, responding quickly only when interrupted by the PAW3950 optical sensor's motion or awakened by user operation. The wireless communication module integrated within the nRF54L15 main control chip, supporting Bluetooth 5.4 and 2.4GHz dual-mode wireless communication, operates with a low duty cycle, further reducing wireless transmission power consumption. This solution, through a multi-layered, refined power management mechanism, enables the mouse to maintain instant responsiveness while significantly reducing overall power consumption, effectively solving the problems of short battery life and unresponsive operation caused by low battery in wireless mice.

[0059] The above description is only a part of the embodiments of this utility model, and does not limit the scope of protection of this utility model. Any equivalent device or equivalent process transformation made based on the content of this utility model specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this utility model.

Claims

1. A low-power device for a mouse, characterized in that, It includes a power management module, a main control module, a sensor module, a user input module, and a wireless communication module; The power management module includes a lithium battery charging management submodule, a multi-channel voltage conversion submodule, and a power path control submodule. The power path control submodule includes multiple MOSFET switches, which independently control the power supply on / off of each submodule in the sensor module and user input module. The main control module includes an nRF54L15 main control chip, a CH32V305 auxiliary MCU chip, and a UART interface. The nRF54L15 main control chip and the CH32V305 auxiliary MCU chip are connected through the UART interface. The nRF54L15 main control chip includes multiple configurable GPIO pins for detecting user input events and controlling the power enable signals of each module. The sensor module includes a PAW3950 optical sensor, which is connected to the main control module via an SPI interface. The user input module includes a mechanical button submodule, a roller encoder submodule, and an RGB indicator light submodule; The wireless communication module is configured to be integrated into the nRF54L15 main control chip, and the wireless communication module supports Bluetooth 5.4 and 2.4GHz dual-mode wireless communication.

2. The low-power device for a mouse according to claim 1, characterized in that, Also includes: A 32kHz low-speed crystal oscillator circuit is connected to the P1.00 / XL1 and P1.01 / XL2 pins of the nRF54L15 main control chip to maintain the real-time clock function during the deep sleep state of the main control module.

3. The low-power device for a mouse according to claim 1, characterized in that, The multi-channel voltage conversion submodule includes: The first voltage conversion unit is configured as an RS3236-ADJ8YF5 low dropout linear regulator. The first voltage conversion unit is used to convert the lithium battery voltage into a first operating voltage of 3.24V. The first operating voltage is used to power the nRF54L15 main control chip. The second voltage conversion unit is configured as an ETA3426 synchronous buck converter. The second voltage conversion unit is used to convert the USB input voltage or lithium battery voltage into a second operating voltage of 3.3V. The second operating voltage is used to power the CH32V305 auxiliary MCU chip and the user input module. The first voltage conversion unit and the second voltage conversion unit are both enabled by the GPIO pin of the nRF54L15 main control chip via the V3.3_EN signal.

4. The low-power device for a mouse according to claim 1, characterized in that, Multiple MOSFET switches are configured to include AO3400 and AO3401A MOSFETs; Multiple MOSFET switches are controlled by the GPIO pins of the nRF54L15 main control chip to independently switch the power supply path between USB power and lithium battery power. One of the MOSFET switches, Q5, is used to control the charging enable of the lithium battery charging management submodule, while the other two MOSFET switches, Q6 and Q7, are used to control the input power selection of each voltage conversion unit.

5. The low-power device for a mouse according to claim 1, characterized in that, The lithium battery charging management submodule includes: The TP4056E lithium battery charging management chip has its PROG pin grounded via a 6.2kΩ precision resistor, and is configured with a charging current of 177mA. The temperature detection circuit includes a thermistor NTC_BAT, which is connected to the TEMP pin of the TP4056E chip for monitoring the lithium battery temperature. The charging status indication circuit outputs charging status signals to the nRF54L15 main control chip through the CHRG and DONE pins of the TP4056E lithium battery charging management chip.

6. The low-power device for a mouse according to claim 1, characterized in that, The user input module further includes: The mechanical button input circuit includes multiple mechanical button switches, and the button signals of the mechanical button switches are connected to the GPIO pins of the nRF54L15 main control chip through pull-up resistors. The roller encoder circuit is configured as a quadrature encoder. The roller encoder circuit is used to output two signals with a 90-degree phase difference to the GPIO pin of the nRF54L15 main control chip. The RGB indicator light driver circuit includes a Q1 switch, a Q2 switch, and a Q3 switch. The Q1 switch is used to control the conduction of the R-LED channel, the Q2 switch is used to control the conduction of the G-LED channel, and the Q3 switch is used to control the conduction of the B-LED channel. The gates of the Q1, Q2, and Q3 switches are controlled by the GPIO pins of the nRF54L15 main control chip.

7. The low-power device for a mouse according to claim 1, characterized in that, The P1.04 / AIN0 to P1.07 / AIN3 pins of the nRF54L15 main control chip are configured as ADC input channels for acquiring lithium battery voltage signals and sensor module operating status signals. The P0.00 to P0.04 general-purpose I / O pins of the nRF54L15 main control chip are respectively connected to the button signals of the left, right, middle, forward, and back buttons of the mouse, and are used to detect user input events.

8. The low-power device for a mouse according to claim 1, characterized in that, The MOTION pin of the PAW3950 optical sensor is connected to the P1.08 pin of the nRF54L15 main control chip, and is used to generate a hardware interrupt signal to wake up the main control module when mouse movement is detected. The PAW3950 optical sensor communicates with the nRF54L15 main control chip via an SPI bus. The SPI bus includes four signal lines: NCS, SCLK, MOSI, and MISO, which are respectively connected to the corresponding GPIO pins of the nRF54L15 main control chip.

9. The low-power device for a mouse according to claim 1, characterized in that, It also includes a TYPE-C interface circuit, which includes a CC1 pin configuration circuit and a CC2 pin configuration circuit. The CC1 pin configuration circuit is connected to the USB_DN data line through a 2.2Ω resistor, and the CC2 pin configuration circuit is connected to the USB_DP data line through a 2.2Ω resistor. The VBUS pin of the TYPE-C interface generates a VBUS_5V voltage after passing through the TPAZ5125-01H overvoltage protection chip, which is used to provide input power.

10. The low-power device for a mouse according to claim 1, characterized in that, The wireless communication module also includes an RF matching network circuit, which is connected between the RF output pin of the nRF54L15 main control chip and the antenna. The radio frequency matching network circuit includes a 2.7nH inductor L2, a 3.5nH inductor L3, a 3.5nH inductor L4, a 1.5pF capacitor C6, a 2.0pF capacitor C9, and a 3.9pF capacitor C13, used to achieve 50Ω impedance matching.

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