A cloud payment speaker with dynamically displayed QR codes.

Abstract

This application relates to the field of payment speakers, and specifically to a cloud payment speaker with a dynamically displayed QR code. It includes a main body, a CAT1 module mounted on the main body, and a digital display module and an LCD display module connected to the CAT1 module. The digital display module is located on the front of the main body and is used to display the transaction amount. The LCD display module is located on the rear of the main body and is used to display a dynamic QR code. The CAT1 module uses an AIR724UG chip. The digital display module includes a display connection circuit and a level conversion circuit for matching the level of the CAT1 module. This application provides a cloud payment speaker with a dynamically displayed QR code, which can improve user experience and security.

Description

Technical Field

[0001] This application relates to the field of payment speaker, and in particular to a cloud payment speaker with dynamically displayed QR codes. Background Technology

[0002] The cloud-based payment speaker is a smart device that combines IoT, cloud computing, and mobile payment technologies. Designed specifically for merchants, it provides real-time voice announcements. After each successful payment, the speaker automatically announces the amount, payment method, and transaction status, ensuring merchants are promptly informed of transaction details. It supports multiple volume levels to adapt to noisy environments (such as night markets and farmers' markets). Currently, most payment speakers only provide auditory transaction information after payment, lacking visual information, and most devices use static QR codes for scanning payments, resulting in poor security. Summary of the Invention

[0003] In view of this, this application provides a cloud payment speaker with dynamically displayed QR codes, which can improve the user experience and security.

[0004] To achieve the above objectives, this application employs the following technical solution:

[0005] A cloud payment speaker with dynamic QR code display, characterized in that: it includes a main body, a CAT1 module disposed on the main body, and a digital display module and an LCD display module connected to the CAT1 module; the digital display module is disposed on the front side of the main body for displaying the transaction amount; the LCD display module is disposed on the rear side of the main body for displaying the dynamic QR code; the CAT1 module uses an AIR724UG chip;

[0006] The digital display module includes a display connection circuit and a level conversion circuit for matching the CAT1 module level; the display connection circuit includes resistor R53, resistor R52, transistor Q12, MOSFET Q11, resistor 51, digital connector J1, and resistor R50.

[0007] The LCD_P3 terminal of the CAT1 module is connected to resistor R53. The other end of resistor R53 is connected to resistor R52 and the base of transistor Q12. The other end of resistor R52 is grounded. The emitter of transistor Q12 is grounded. The collector of transistor Q12 is connected to one end of resistor R50 and the gate of MOSFET Q11. The other end of resistor R50 is connected to the 5V output terminal and the drain of MOSFET Q11. One end of resistor 51 is grounded. The other end of resistor 51 is connected to the gate of MOSFET Q11. The source of MOSFET Q11 is connected to pin 4 of digital connector J1.

[0008] The level conversion circuit includes a first conversion circuit and a second conversion circuit; the first conversion circuit includes a resistor R54, a MOSFET Q13, a resistor R57, and a resistor R58: the 12C2_SCL terminal of the CAT1 module is connected to one end of the resistor R54 and the drain of the MOSFET Q13, the other end of the resistor R54 is connected to the resistor R57, and the connection point of the two is connected to the V_GLOABLE_1V8 terminal of the CAT1 module; the other end of the resistor R57 is connected to the gate of the MOSFET Q13; the source of the MOSFET Q13 is connected to one end of the resistor R58 and the 12C_SCL terminal, the other end of the resistor R58 is connected to the 5V output terminal, and the 12C_SCL terminal is connected to pin 2 of the digital connector J1;

[0009] The second conversion circuit includes resistor R59, MOSFET Q14, resistor R61, and resistor R60. The 12C2_SDA terminal of the CAT1 module is connected to one end of resistor R59 and the drain of MOSFET Q14. The other end of resistor R59 is connected to resistor R60, and the connection point of the two is connected to the V_GLOABLE_1V8 terminal of the CAT1 module. The other end of resistor R60 is connected to the gate of MOSFET Q14. The source of MOSFET Q14 is connected to one end of resistor R61 and the 12C_SDA terminal. The other end of resistor R58 is connected to the 5V output terminal. The 12C_SDA terminal is connected to pin 3 of digital connector J1.

[0010] The aforementioned cloud payment speaker with dynamically displayed QR codes, through a digital display module on the front of the main body, can display the transaction amount for merchants to view, providing a good user experience. An LCD display module on the rear of the main body can display dynamic QR codes, increasing security.

[0011] In some embodiments, the liquid crystal display module includes resistor R18, transistor Q4, resistor R19, resistor R17, resistor R24, resistor R2, liquid crystal connector J13, resistor R31, transistor Q6, resistor R30, resistor R20, resistor R25, and resistor R23.

[0012] The LCD_P1 terminal of the CAT1 module is connected to one end of resistor R18. The other end of resistor R18 is connected to the base of transistor Q4 and one end of resistor R19. The other end of resistor R19 is grounded. The emitter of transistor Q4 is grounded. The collector of transistor Q4 is connected to one end of resistor R17 and the gate of MOSFET Q3. One end of resistor R24 ​​is grounded. The other end of resistor R24 ​​is connected to the gate of MOSFET Q3. The other end of resistor R17 is connected to the 5V output terminal and the drain of MOSFET Q3. The source of MOSFET Q3 is connected to one end of resistor R2. The other end of resistor R2 is connected to pins 2 and 3 of LCD connector J13.

[0013] The LCD_P2 terminal of the CAT1 module is connected to one end of resistor R31. The other end of resistor R31 is connected to the base of transistor Q6 and one end of resistor R30. The other end of resistor R30 is grounded. The emitter of transistor Q6 is grounded. The collector of transistor Q6 is connected to one end of resistor R20 and the gate of MOSFET Q5. One end of resistor R25 is grounded. The other end of resistor R25 is connected to the gate of MOSFET Q5. The other end of resistor R20 is connected to the 5V output terminal and the drain of MOSFET Q5. The source of MOSFET Q5 is connected to one end of resistor R23. The other end of resistor R23 is connected to pins 2 and 3 of LCD connector J13.

[0014] In some embodiments, the CAT1 module is further provided with a filtering circuit and an anti-matching circuit; the filtering circuit includes capacitors C13, C10 and C8; capacitors C13, C10 and C8 are connected in parallel, and one end of capacitor C10 is grounded, and the other end is connected to pins 59 and 60 of the CAT1 module, which is used to prevent insufficient power supply due to voltage drop and to filter out high-frequency interference signals;

[0015] The anti-matching circuit includes capacitor C18, capacitor C38, and resistor R40: pin 46 of the CAT1 module and one end of capacitor C18 are connected to one end of resistor R40, the other end of resistor R40 is connected to one end of capacitor C38, the other end of capacitor C38 is grounded, and the other end of capacitor C18 is also grounded, which is used to improve the network transmission capability of the CAT1 module.

[0016] In some embodiments, the cloud payment speaker includes an amplifier module; the amplifier module includes capacitor C6, capacitor C21, resistor R22, integrated circuit U4, capacitor C40, capacitor C2, resistor R12, capacitor C41, capacitor C20, resistor R21, capacitor C7, capacitor C17, capacitor C22, connector J5, button X18, and button X17;

[0017] The SPKP[3] terminal of the CAT1 module is connected to one end of capacitor C6 and one end of capacitor C21 respectively. The other end of capacitor C6 is connected to one end of resistor R22. Resistor R22 is connected to pin 3 of integrated circuit U4. Integrated circuit U4 uses TC8871 chip. One end of capacitor C40 is grounded. The other end of capacitor C40 is also connected to pin 3 of integrated circuit U4.

[0018] The SPKN[3] terminal of the CAT1 module is connected to one end of capacitor C2 and the other end of capacitor C21 respectively. The other end of capacitor C2 is connected to resistor R12. The other end of resistor R12 is connected to pin 4 of integrated circuit U4. One end of capacitor C41 is grounded, and the other end of capacitor C41 is also connected to pin 4 of integrated circuit U4. One end of capacitor C20 is grounded, and the other end of capacitor C20 is connected to pin 2 of integrated circuit U4.

[0019] The AUDIO_CS terminal of the CAT1 module is connected to one end of resistor R21, and the other end of resistor R21 is connected to pin 1 of integrated circuit U4; one end of capacitor C7 is grounded, and the other end of capacitor C7 is also connected to pin 1 of integrated circuit U4.

[0020] Capacitors C17 and C22 are connected in parallel, with one end of the parallel circuit grounded and the other end connected to pin 6 of integrated circuit U4 and the VBAT terminal of CAT1 module.

[0021] Pin 2 of connector J5 is connected to pin 5 of integrated circuit U4. Pin 5 of integrated circuit U4 is also connected to button X18. Pin 1 of connector J5 is connected to pin 8 of integrated circuit U4. Pin 8 of integrated circuit U4 is also connected to button X17.

[0022] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0023] This application discloses a cloud payment speaker with a dynamically displayed QR code. A digital display module on the front of the speaker shows the transaction amount for merchants to view, providing a good user experience. An LCD display module on the rear of the speaker displays the dynamic QR code, enhancing security. Attached Figure Description

[0024] Figure 1 This is a circuit diagram of the CAT1 module in an embodiment of this application;

[0025] Figure 2 This is a circuit diagram of the digital tube module in an embodiment of this application;

[0026] Figure 3 This is a circuit diagram of the liquid crystal display module in an embodiment of this application;

[0027] Figure 4 This is a circuit diagram of the power amplifier module in an embodiment of this application. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the application will be described in further detail below with reference to the accompanying drawings. The terminology used in the embodiments section of this application is only for explaining specific embodiments and is not intended to limit the application.

[0029] See Figures 1 to 4 This application provides a cloud payment speaker with a dynamically displayed QR code, including a main body, a CAT1 module disposed on the main body, and a digital display module and an LCD display module connected to the CAT1 module; the digital display module is disposed on the front side of the main body and is used to display the transaction amount; the LCD display module is disposed on the rear side of the main body and is used to display the dynamic QR code; the CAT1 module uses an AIR724UG chip; the digital tube module uses IIC for communication and sends commands through the SCL and SDA of the CAT1 module.

[0030] The digital display module includes a display connection circuit and a level conversion circuit for matching the CAT1 module level; the display connection circuit includes resistor R53, resistor R52, transistor Q12, MOSFET Q11, resistor 51, digital connector J1, and resistor R50.

[0031] The LCD_P3 terminal (pin 29) of the CAT1 module is connected to resistor R53. The other end of resistor R53 is connected to resistor R52 and the base of transistor Q12. The other end of resistor R52 is grounded. The emitter of transistor Q12 is grounded. The collector of transistor Q12 is connected to one end of resistor R50 and the gate of MOSFET Q11. The other end of resistor R50 is connected to the 5V output terminal and the drain of MOSFET Q11. One end of resistor R51 is grounded. The other end of resistor R51 is connected to the gate of MOSFET Q11. The source of MOSFET Q11 is connected to pin 4 of digital connector J1.

[0032] Resistors R53 and R52, transistor Q12, MOSFET Q11, and resistor R51 form an electronic switch to control the 5V power supply of the digital display. R53, R52, and Q2 form a digital signal switch, using the 1.8V output voltage from the CAT1 module pins to control the switching on and off of MOSFET Q11. This achieves the power switch function. J1 is a connector for the display device. J1 has 4 pins with a pin spacing of 1.0mm.

[0033] The level conversion circuit includes a first conversion circuit and a second conversion circuit; the first conversion circuit includes a resistor R54, a MOSFET Q13, a resistor R57, and a resistor R58: the 12C2_SCL terminal (pin 32) of the CAT1 module is connected to one end of the resistor R54 and the drain of the MOSFET Q13, the other end of the resistor R54 is connected to the resistor R57, and the connection point of the two is connected to the V_GLOABLE_1V8 terminal (pin 65) of the CAT1 module, the other end of the resistor R57 is connected to the gate of the MOSFET Q13, the source of the MOSFET Q13 is connected to one end of the resistor R58 and the 12C_SCL terminal, the other end of the resistor R58 is connected to the 5V output terminal, and the 12C_SCL terminal is connected to pin 2 of the digital connector J1;

[0034] The second conversion circuit includes resistor R59, MOSFET Q14, resistor R61, and resistor R60. The 12C2_SDA terminal (pin 31) of the CAT1 module is connected to one end of resistor R59 and the drain of MOSFET Q14. The other end of resistor R59 is connected to resistor R60, and the connection between the two is connected to the V_GLOABLE_1V8 terminal (pin 65) of the CAT1 module. The other end of resistor R60 is connected to the gate of MOSFET Q14. The source of MOSFET Q14 is connected to one end of resistor R61 and the 12C_SDA terminal. The other end of resistor R58 is connected to the 5V output terminal. The 12C_SDA terminal is connected to pin 3 of the digital connector J1.

[0035] The CAT1 module output pin is 1.8V, while the display module drive voltage is 5V. The voltage is matched by a conversion circuit. When I2CI2_SCL or I2CI2_SDA outputs a high level (1.8V), I2C_SCL and I2C_SDA will be converted to 5V.

[0036] This cloud payment speaker with dynamically displayed QR codes features a digital display module on the front of the main unit to show transaction amounts for merchants to view, providing a good user experience. An LCD display module on the rear of the main unit can display dynamic QR codes, enhancing security.

[0037] The liquid crystal display module includes resistor R18, transistor Q4, resistor R19, resistor R17, resistor R24, resistor R2, liquid crystal connector J13, resistor R31, transistor Q6, resistor R30, resistor R20, resistor R25 and resistor R23.

[0038] The LCD_P1 terminal (pin 25) of the CAT1 module is connected to one end of resistor R18. The other end of resistor R18 is connected to the base of transistor Q4 and one end of resistor R19. The other end of resistor R19 is grounded. The emitter of transistor Q4 is grounded. The collector of transistor Q4 is connected to one end of resistor R17 and the gate of MOSFET Q3. One end of resistor R24 ​​is grounded. The other end of resistor R24 ​​is connected to the gate of MOSFET Q3. The other end of resistor R17 is connected to the 5V output terminal and the drain of MOSFET Q3. The source of MOSFET Q3 is connected to one end of resistor R2. The other end of resistor R2 is connected to pins 2 and 3 of LCD connector J13.

[0039] The LCD_P2 terminal (pin 26) of the CAT1 module is connected to one end of resistor R31. The other end of resistor R31 is connected to the base of transistor Q6 and one end of resistor R30. The other end of resistor R30 is grounded. The emitter of transistor Q6 is grounded. The collector of transistor Q6 is connected to one end of resistor R20 and the gate of MOSFET Q5. One end of resistor R25 is grounded. The other end of resistor R25 is connected to the gate of MOSFET Q5. The other end of resistor R20 is connected to the 5V output terminal and the drain of MOSFET Q5. The source of MOSFET Q5 is connected to one end of resistor R23. The other end of resistor R23 is connected to pins 2 and 3 of LCD connector J13.

[0040] Resistors R18, Q4, R19, R17, R24, and R31, along with transistor Q6, R30, R20, and R25, form a 5V power switch circuit to turn the LCD power on and off. CAT1 is 1.8V, requiring a transistor to drive the MOSFET. Resistors R23 and R2 are current-limiting resistors to control the LCD brightness. These two circuits enable LCD dimming, with the following combinations: first group on, second group off; first group off, second group on; first group on, second group on. Connector J13 is the LCD FPC connector and connects to the LCD display device. J13 has 12 pins with a pin pitch of 0.5mm.

[0041] The CAT1 module is also equipped with a filtering circuit and an anti-matching circuit. The filtering circuit includes capacitors C13, C10 and C8. Capacitors C13, C10 and C8 are connected in parallel, and one end of capacitor C10 is grounded, while the other end is connected to pins 59 and 60 of the CAT1 module. This is used to prevent voltage drops from causing insufficient power supply and to filter out high-frequency interference signals.

[0042] The anti-matching circuit includes capacitors C18 and C38, and resistor R40: pin 46 of the CAT1 module and one end of capacitor C18 are connected to one end of resistor R40, the other end of resistor R40 is connected to one end of capacitor C38, the other end of capacitor C38 is grounded, and the other end of capacitor C18 is also grounded, which is used to improve the network transmission capability of the CAT1 module. This CAT1 module can communicate externally via 4G communication.

[0043] The matching circuit is a Π-shaped circuit, and the radio frequency transmission performance can be adjusted by adjusting the parameters.

[0044] The cloud payment speaker includes an amplifier module; the amplifier module includes capacitor C6, capacitor C21, resistor R22, integrated circuit U4, capacitor C40, capacitor C2, resistor R12, capacitor C41, capacitor C20, resistor R21, capacitor C7, capacitor C17, capacitor C22, connector J5, button X18, and button X17.

[0045] The SPKP[3] terminal of the CAT1 module is connected to one end of capacitor C6 and one end of capacitor C21 respectively. The other end of capacitor C6 is connected to one end of resistor R22. Resistor R22 is connected to pin 3 of integrated circuit U4. Integrated circuit U4 uses TC8871 chip. One end of capacitor C40 is grounded. The other end of capacitor C40 is also connected to pin 3 of integrated circuit U4.

[0046] The SPKN[3] terminal of the CAT1 module is connected to one end of capacitor C2 and the other end of capacitor C21 respectively. The other end of capacitor C2 is connected to resistor R12. The other end of resistor R12 is connected to pin 4 of integrated circuit U4. One end of capacitor C41 is grounded, and the other end of capacitor C41 is also connected to pin 4 of integrated circuit U4. One end of capacitor C20 is grounded, and the other end of capacitor C20 is connected to pin 2 of integrated circuit U4.

[0047] The AUDIO_CS terminal (pin 37) of the CAT1 module is connected to one end of resistor R21, and the other end of resistor R21 is connected to pin 1 of integrated circuit U4; one end of capacitor C7 is grounded, and the other end of capacitor C7 is also connected to pin 1 of integrated circuit U4.

[0048] Capacitors C17 and C22 are connected in parallel, with one end of the parallel circuit grounded and the other end connected to pin 6 of integrated circuit U4 and the VBAT terminal (pins 59 and 60) of CAT1 module.

[0049] Pin 2 of connector J5 is connected to pin 5 of integrated circuit U4. Pin 5 of integrated circuit U4 is also connected to button X18. Pin 1 of connector J5 is connected to pin 8 of integrated circuit U4. Pin 8 of integrated circuit U4 is also connected to button X17.

[0050] The amplifier module has a built-in differential audio output, which amplifies the audio signal through the audio amplifier and controls the amplifier's operation via the GPIO of the CAT1 module. Connector J5 is used to connect the speaker; it has two pins with a pin-to-pin indirection of 1.25mm.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A cloud payment sound box with dynamic display of two-dimensional code, characterized in that: The device includes a main body, a CAT1 module mounted on the main body, and a digital display module and an LCD display module connected to the CAT1 module. The digital display module is located on the front of the main body and is used to display the transaction amount. The LCD display module is located on the rear of the main body and is used to display a dynamic QR code. The CAT1 module uses an AIR724UG chip. The digital display module includes a display connection circuit and a level conversion circuit for matching the CAT1 module level; the display connection circuit includes resistor R53, resistor R52, transistor Q12, MOSFET Q11, resistor 51, digital connector J1, and resistor R50. The LCD_P3 terminal of the CAT1 module is connected to resistor R53. The other end of resistor R53 is connected to resistor R52 and the base of transistor Q12. The other end of resistor R52 is grounded. The emitter of transistor Q12 is grounded. The collector of transistor Q12 is connected to one end of resistor R50 and the gate of MOSFET Q11. The other end of resistor R50 is connected to the 5V output terminal and the drain of MOSFET Q11. One end of resistor 51 is grounded. The other end of resistor 51 is connected to the gate of MOSFET Q11. The source of MOSFET Q11 is connected to pin 4 of digital connector J1. The level conversion circuit includes a first conversion circuit and a second conversion circuit; the first conversion circuit includes a resistor R54, a MOSFET Q13, a resistor R57, and a resistor R58: the 12C2_SCL terminal of the CAT1 module is connected to one end of the resistor R54 and the drain of the MOSFET Q13, the other end of the resistor R54 is connected to the resistor R57, and the connection point of the two is connected to the V_GLOABLE_1V8 terminal of the CAT1 module; the other end of the resistor R57 is connected to the gate of the MOSFET Q13; the source of the MOSFET Q13 is connected to one end of the resistor R58 and the 12C_SCL terminal, the other end of the resistor R58 is connected to the 5V output terminal, and the 12C_SCL terminal is connected to pin 2 of the digital connector J1; The second conversion circuit includes resistor R59, MOSFET Q14, resistor R61, and resistor R60. The 12C2_SDA terminal of the CAT1 module is connected to one end of resistor R59 and the drain of MOSFET Q14. The other end of resistor R59 is connected to resistor R60, and the connection point of the two is connected to the V_GLOABLE_1V8 terminal of the CAT1 module. The other end of resistor R60 is connected to the gate of MOSFET Q14. The source of MOSFET Q14 is connected to one end of resistor R61 and the 12C_SDA terminal. The other end of resistor R58 is connected to the 5V output terminal. The 12C_SDA terminal is connected to pin 3 of digital connector J1.

2. The cloud payment sound box with dynamic display two-dimensional code according to claim 1, characterized in that: The liquid crystal display module includes resistor R18, transistor Q4, resistor R19, resistor R17, resistor R24, resistor R2, liquid crystal connector J13, resistor R31, transistor Q6, resistor R30, resistor R20, resistor R25 and resistor R23. The LCD_P1 terminal of the CAT1 module is connected to one end of resistor R18. The other end of resistor R18 is connected to the base of transistor Q4 and one end of resistor R19. The other end of resistor R19 is grounded. The emitter of transistor Q4 is grounded. The collector of transistor Q4 is connected to one end of resistor R17 and the gate of MOSFET Q3. One end of resistor R24 ​​is grounded. The other end of resistor R24 ​​is connected to the gate of MOSFET Q3. The other end of resistor R17 is connected to the 5V output terminal and the drain of MOSFET Q3. The source of MOSFET Q3 is connected to one end of resistor R2. The other end of resistor R2 is connected to pins 2 and 3 of LCD connector J13. The LCD_P2 terminal of the CAT1 module is connected to one end of resistor R31. The other end of resistor R31 is connected to the base of transistor Q6 and one end of resistor R30. The other end of resistor R30 is grounded. The emitter of transistor Q6 is grounded. The collector of transistor Q6 is connected to one end of resistor R20 and the gate of MOSFET Q5. One end of resistor R25 is grounded. The other end of resistor R25 is connected to the gate of MOSFET Q5. The other end of resistor R20 is connected to the 5V output terminal and the drain of MOSFET Q5. The source of MOSFET Q5 is connected to one end of resistor R23. The other end of resistor R23 is connected to pins 2 and 3 of LCD connector J13.

3. The cloud payment sound box with dynamic display two-dimensional code according to claim 1, characterized in that: The CAT1 module is also equipped with a filtering circuit and an anti-matching circuit. The filtering circuit includes capacitors C13, C10 and C8. Capacitors C13, C10 and C8 are connected in parallel, and one end of capacitor C10 is grounded, while the other end is connected to pins 59 and 60 of the CAT1 module. This is used to prevent voltage drops from causing insufficient power supply and to filter out high-frequency interference signals. The anti-matching circuit includes capacitor C18, capacitor C38, and resistor R40: pin 46 of the CAT1 module and one end of capacitor C18 are connected to one end of resistor R40, the other end of resistor R40 is connected to one end of capacitor C38, the other end of capacitor C38 is grounded, and the other end of capacitor C18 is also grounded, which is used to improve the network transmission capability of the CAT1 module.

4. The cloud payment speaker with dynamic display two-dimensional code according to claim 3, characterized in that: The cloud payment speaker includes an amplifier module; the amplifier module includes capacitor C6, capacitor C21, resistor R22, integrated circuit U4, capacitor C40, capacitor C2, resistor R12, capacitor C41, capacitor C20, resistor R21, capacitor C7, capacitor C17, capacitor C22, connector J5, button X18, and button X17. The SPKP[3] terminal of the CAT1 module is connected to one end of capacitor C6 and one end of capacitor C21 respectively. The other end of capacitor C6 is connected to one end of resistor R22. Resistor R22 is connected to pin 3 of integrated circuit U4. Integrated circuit U4 uses TC8871 chip. One end of capacitor C40 is grounded. The other end of capacitor C40 is also connected to pin 3 of integrated circuit U4. The SPKN[3] terminal of the CAT1 module is connected to one end of capacitor C2 and the other end of capacitor C21 respectively. The other end of capacitor C2 is connected to resistor R12. The other end of resistor R12 is connected to pin 4 of integrated circuit U4. One end of capacitor C41 is grounded, and the other end of capacitor C41 is also connected to pin 4 of integrated circuit U4. One end of capacitor C20 is grounded, and the other end of capacitor C20 is connected to pin 2 of integrated circuit U4. The AUDIO_CS terminal of the CAT1 module is connected to one end of resistor R21, and the other end of resistor R21 is connected to pin 1 of integrated circuit U4; one end of capacitor C7 is grounded, and the other end of capacitor C7 is also connected to pin 1 of integrated circuit U4. Capacitors C17 and C22 are connected in parallel, with one end of the parallel circuit grounded and the other end connected to pin 6 of integrated circuit U4 and the VBAT terminal of CAT1 module. Pin 2 of connector J5 is connected to pin 5 of integrated circuit U4. Pin 5 of integrated circuit U4 is also connected to button X18. Pin 1 of connector J5 is connected to pin 8 of integrated circuit U4. Pin 8 of integrated circuit U4 is also connected to button X17.

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