Circuit based on Rensa DPJ chip
By adopting a circuit design based on Renesas DPJ chip in electric vehicle instruments, the problem of redundancy and complexity of traditional electric vehicle instrument circuits and the problem of easily causing defects in manual welding pins is solved, achieving higher stability and production efficiency.
Patent Information
- Application Number
- CN202420304720.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-19
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-02-19
AI Technical Summary
The circuit design of traditional electric vehicle instruments is redundant and complex, and due to manual welding of pins, it is easy to have problems such as false welding, missing welding, and short circuit, resulting in low stability of the instrument circuit, many defective products, easy to damage the components, and low production efficiency.
The circuit design based on Renesas DPJ chip is adopted, including a central controller MCU, an LCD LCD screen with built-in LCD driver chip and other module units. By reducing the number of MCU pins used, the production process is simplified, and the defects of manual soldering of pins are avoided.
It reduces the redundancy and complexity of instrument circuits, improves stability and production efficiency, and reduces component damage and defective products.
Smart Images
Figure CN222774745U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuits of electric vehicle instruments, and more specifically to a circuit based on a Renesas DPJ chip. Background Art
[0002] Most of the central controller MCU chips used in traditional electric vehicle instruments do not have interface pins for connecting to the built-in driver chip of the LCD screen, so most of these instruments use a broken-code LCD screen without a built-in LCD driver chip. When installing the meter, this type of LCD screen requires employees to manually solder its metal pins to the instrument panel by soldering with tin bars. The display function of the instrument also requires the central controller MCU to transmit data signals to the metal pins of the LCD screen connected to it through a pin-by-pin driving method, thereby driving the LCD screen for related display.
[0003] This instrument circuit design occupies a large number of pins of the central controller MCU chip, resulting in problems such as excessive redundancy of the instrument circuit and high circuit complexity. At the same time, due to the manual soldering of pins, this instrument circuit is prone to cold soldering, leaking soldering, or even short circuits, which will cause problems such as low stability of the instrument circuit, a large number of defective products, easy damage to components, and low production efficiency.
[0004] Therefore, a new circuit is urgently needed to solve the above problems. Summary of the invention
[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and to propose a circuit based on the Renesas DPJ chip, which optimizes the redundancy and complexity of the original instrument circuit and simplifies the generation process.
[0006] The purpose of the utility model is implemented through the following technical scheme: a circuit based on Renesas DPJ chip, which includes a central controller MCU, an 8MHz crystal oscillator, a 32.768KHz crystal oscillator, an E2 module unit, a buzzer module unit, a CAN module unit, a light guide module unit, a DC-DC conversion circuit unit, a broken code LCD display interface unit, an LED lamp driver chip and a low-level signal acquisition unit, the central controller MCU is connected to the DC-DC conversion circuit unit through a VCC voltage input pin, the central controller MCU is connected to the CAN module unit through a CAN signal input pin Rx-CAN, the central controller MCU is connected to the buzzer module unit through a sound amplitude output pin SGOF and a sound frequency output pin SGOA,
[0007] The central controller MCU is connected to the 8MHz crystal oscillator through the crystal oscillator signal input pins X1 and X2, the central controller MCU is connected to the 32.768KHz crystal oscillator through the crystal oscillator signal input pins XT1 and XT2, the central controller MCU is connected to the E2 module unit through the data signal input pin E2-SCL and the clock signal input pin E2-SDA, the central controller MCU is connected to the light guide belt module unit through the PWM square wave signal input pin BG-PWM2, the central controller MCU is connected to the broken code LCD screen display interface unit through the data signal output pin SDA and the clock signal output pin SCL, the central controller MCU is connected to the LED lamp driver chip through pins, and the central controller MCU is connected to the low-level signal acquisition unit through input pins.
[0008] In the above technical solution: the 8MHz crystal oscillator includes a capacitor C1 with a capacitance of 20pF, and a capacitor C2 with a capacitance of 20pF is connected in parallel to the capacitor C1.
[0009] In the above technical solution: the 32.768KHz crystal oscillator includes a capacitor C3 with a capacitance of 10pF, a capacitor C4 with a capacitance of 10pF is connected in parallel to the capacitor C3, and the 32.768KHz crystal oscillator is a real-time clock crystal oscillator.
[0010] In the above technical solution: the E2 module unit includes a working voltage input pin VCC, a capacitor C5 is connected in series to the working voltage input pin VCC, the capacitor C5 is divided into two paths and connected in series with a current limiting resistor R1 and R2 with the same resistance value of 4.7KΩ, and the resistors R1 and R2 are connected in series with the E2 chip respectively.
[0011] In the above technical solution: the buzzer module unit includes a voltage input pin VBAT, a sound amplitude input pin SGOA, and a sound frequency input pin SGOF. The voltage input pin VBAT is connected in series with a diode M7. The diode M7 is divided into two series resistors R3 and a transistor Q1. The parallel circuit of the resistor R3 and the transistor Q1 is connected in series with a resistor R4. The resistor R4 is divided into two series capacitors C6 and a player peripheral. The sound amplitude input pin SGOA is connected in series with a resistor R6. The resistor R6 is divided into two series resistors R7 and a transistor Q3. The parallel circuit of the resistor R7 and the transistor Q3 is connected in series with a resistor R5. The sound frequency input pin SGOF is connected in series with a resistor R8. The resistor R8 is divided into two series resistors R9 and a transistor Q2. The parallel circuit of the resistor R9 and the transistor Q2 is divided into two series diodes M7 and a player peripheral.
[0012] In the above technical solution: the light guide tape module unit includes a voltage input pin VCC, a resistor R21 is connected in series to the pin VCC, a light emitting diode LED1 is connected in series to the resistor R21, 9 groups of completely identical resistors Rx and diodes LEDx are connected in parallel to the series circuit of the resistor R21 and the diode LED1 to form a parallel whole, the parallel whole is connected in series with a transistor Q12, the transistor Q12 is connected in series with a resistor 32, and the resistor 32 is connected in series with a resistor 31.
[0013] In the above technical solution: the low-level signal acquisition unit includes A4, A5, A6, A7, and A8 low-level acquisition ports, the A4 acquisition port is connected in series with a diode D11, the diode D11 is divided into two paths and is respectively connected in series with a resistor R11 and a resistor R10, the resistor R10 is connected in series with a VCC_1 power supply circuit, the resistor R11 is connected in series with a capacitor C7, the capacitor C7 is connected in series with a resistor R12, and the capacitor C7 and the resistor R12 are connected in parallel with a wire.
[0014] The utility model has the following advantages: 1. The utility model greatly reduces the number of central controller MCU pins by using a central controller MCU and an LCD screen with a built-in liquid crystal driver chip, optimizes the redundancy and relatively complex problems of the original instrument circuit to a great extent, and simplifies the production process.
[0015] 2. The instrument using the circuit of the utility model can be connected to a plug-in LCD screen. Since there is no need to manually solder the pins of the LCD screen, the situation of cold soldering, leaking soldering and short circuit caused by manual soldering can be directly avoided, thereby improving the stability and production efficiency of the instrument circuit and reducing the damage rate and defective products of components. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of the central controller MCU
[0017] Figure 2 This is a structural diagram of an 8MHz crystal oscillator.
[0018] Figure 3 This is a structural diagram of a 32.768KHz crystal oscillator.
[0019] Figure 4 It is a schematic diagram of the structure of the E2 (EEPROM) module unit.
[0020] Figure 5 It is a structural diagram of the buzzer module unit.
[0021] Figure 6 It is a structural diagram of the CAN module unit.
[0022] Figure 7 Schematic diagram of the structure of the light guide strip module unit.
[0023] Figure 8 It is a structural schematic diagram of a DC-DC conversion circuit unit.
[0024] Fig. 9 It is a structural diagram of the broken code LCD screen display interface unit.
[0025] Fig.10 This is a schematic diagram of the structure of the LED lamp driver chip.
[0026] Fig.11 It is a structural diagram of the low-level signal acquisition unit.
[0027] Fig.12 This is a schematic diagram of the structure of the circuit based on the Renesas DPJ chip.
[0028] In the figure: central controller MCU1, 8MHz crystal oscillator 2, 32.768KHz crystal oscillator 3, E2 module unit 4, buzzer module unit 5, CAN module unit 6, light guide module unit 7, DC-DC conversion circuit unit 8, broken code LCD screen display interface unit 9, LED lamp driver chip 10, low level signal acquisition unit 11. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the utility model are described clearly and completely below. The embodiments of the utility model and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] Reference Figure 1 As shown: a circuit based on Renesas DPJ chip, it includes a central controller MCU1, an 8MHz crystal oscillator 2, a 32.768KHz crystal oscillator 3, an E2 module unit 4, a buzzer module unit 5, a CAN module unit 6, a light guide module unit 7, a DC-DC conversion circuit unit 8, a broken code LCD display interface unit 9, an LED lamp driver chip 10 and a low-level signal acquisition unit 11, the central controller MCU1 is connected to the DC-DC conversion circuit unit 8 through a VCC voltage input pin, the central controller MCU1 is connected to the CAN module unit 6 through a CAN signal input pin Rx-CAN, and the central controller MCU1 is connected to the buzzer module unit 5 through a sound amplitude output pin SGOF and a sound frequency output pin SGOA.
[0031] The central controller MCU1 is connected to the 8MHz crystal oscillator 2 through the crystal oscillator signal input pins X1 and X2, the central controller MCU1 is connected to the 32.768KHz crystal oscillator 3 through the crystal oscillator signal input pins XT1 and XT2, the central controller MCU1 is connected to the E2 module unit 4 through the data signal input pin E2-SCL and the clock signal input pin E2-SDA, the central controller MCU1 is connected to the light guide module unit 7 through the PWM square wave signal input pin BG-PWM2, the central controller MCU1 is connected to the broken code LCD screen display interface unit 9 through the data signal output pin SDA and the clock signal output pin SCL, the central controller MCU1 is connected to the LED lamp driver chip 10 through pins, and the central controller MCU1 is connected to the low-level signal acquisition unit 11 through the output pin. Fig.12 shown.
[0032] The 8MHz crystal oscillator includes a capacitor C1 with a capacitance of 20pF, and a capacitor C2 with a capacitance of 20pF is connected in parallel to the capacitor C1. The 32.768KHz crystal oscillator includes a capacitor C3 with a capacitance of 10pF, and a capacitor C4 with a capacitance of 10pF is connected in parallel to the capacitor C3. The 32.768KHz crystal oscillator is a real-time clock crystal oscillator.
[0033] The E2 module unit 4 includes a working voltage input pin VCC, a capacitor C5 is connected in series to the working voltage input pin VCC, and the capacitor C5 is divided into two paths and connected in series with current limiting resistors R1 and R2 with the same resistance value of 4.7KΩ, respectively. The resistors R1 and R2 are connected in series with the E2 chip respectively.
[0034] The buzzer module unit 5 includes a voltage input pin VBAT, a sound amplitude input pin SGOA, and a sound frequency input pin SGOF. The voltage input pin VBAT is connected in series with a diode M7, and the diode M7 is divided into two series resistors R3 and a transistor Q1. The parallel circuit of the resistor R3 and the transistor Q1 is connected in series with a resistor R4, and the resistor R4 is divided into two series capacitors C6 and a player peripheral. The sound amplitude input pin SGOA is connected in series with a resistor R6, and the resistor R6 is divided into two series resistors R7 and a transistor Q3. The parallel circuit of the resistor R7 and the transistor Q3 is connected in series with a resistor R5. The sound frequency input pin SGOF is connected in series with a resistor R8, and the resistor R8 is divided into two series resistors R9 and a transistor Q2. The parallel circuit of the resistor R9 and the transistor Q2 is divided into two series diodes M7 and a player peripheral.
[0035] The light guide tape module unit includes a voltage input pin VCC, a resistor R21 is connected in series to the pin VCC, a light emitting diode LED1 is connected in series to the resistor R21, 9 groups of completely identical resistors Rx and diodes LEDx are connected in parallel to the series circuit of the resistor R21 and the diode LED1 to form a parallel whole, the parallel whole is connected in series with a transistor Q12, a resistor 32 is connected in series to the transistor Q12, and the resistor 32 is connected in series with a resistor 31.
[0036] The low-level signal acquisition unit 11 includes low-level acquisition ports A4, A5, A6, A7, and A8. The A4 acquisition port is connected in series with a diode D11. The diode D11 is divided into two paths and is respectively connected in series with a resistor R11 and a resistor R10. The resistor R10 is connected in series with a VCC_1 power supply circuit. The resistor R11 is connected in series with a capacitor C7. The capacitor C7 is connected in series with a resistor R12. The capacitor C7 and the resistor R12 are connected in parallel with a wire.
[0037] Embodiment: The central controller MCU1 receives the working voltage allocated by the DC-DC conversion circuit unit through the VCC voltage input pin to ensure its normal operation; receives the timing beat signal generated by the 8MHz crystal oscillator 2 through the crystal oscillator signal input pins X1 and X2 to ensure that the central controller MCU1 executes program instructions normally; receives the clock signal generated by the 32.768KHz crystal oscillator 3 through the crystal oscillator signal input pins XT1 and XT2 to realize the real-time clock display function.
[0038] The central controller MCU1 realizes data communication with the E2 module unit 4 through the data signal input pin E2-SCL and the clock signal input pin E2-SDA.
[0039] The central controller MCU1 transmits the configuration information of the buzzer to the buzzer module unit 5 through the sound amplitude output pin SGOF and the sound frequency output pin SGOA to control its chirping.
[0040] The central controller MCU1 receives the CAN signal transmitted by the CAN communication module unit 6 through the CAN signal input pin Rx-CAN, and transmits the CAN signal sent out by the instrument to the CAN communication module unit 6 through the CAN signal output pin Tx-CAN, thereby realizing communication with external devices.
[0041] The central controller MCU1 receives the PWM square wave signal generated by the light guide belt module unit 7 through the PWM square wave signal input pin BG-PWM2, which is used to control the display brightness of the LCD liquid crystal screen.
[0042] The central controller MCU1 transmits the lighting signal to the indicator light driver chip ME2656-A through the data signal output pin LED_SDI_A and the clock signal output pin LED_CLK_A, and transmits the control instruction to the driver chip ME2656-A through the pins LED_LE_A and LED_OE_A to control its working state; transmits the lighting signal to the indicator light driver chip ME2656-C through the data signal output pin LED_SDI_C and the clock signal output pin LED_CLK_C, and transmits the control instruction to the driver chip ME2656-C through the pins LED_LE_C and LED_OE_C to control its working state; (the indicator light driver chips ME2656-A, ME2656-B, ME2656-C, and ME2656-D are all LED lamp driver chips 10).
[0043] The central controller MCU1 transmits data information to the broken code LCD display interface unit 9 through the data signal output pin SDA and the clock signal output pin SCL, which is used to control the content display of the broken code LCD. Figure 1 shown.
[0044] The 8MHz crystal oscillator 2 includes a capacitor C1 with a capacitance of 20pF, and a capacitor C2 with a capacitance of 20pF is connected in parallel to the capacitor C1. When the 8MHz crystal oscillator 2 generates a timing beat signal, the parallel capacitors C1 and C2 filter the signal and then transmit it to the central controller MCU (DPJ chip) through the crystal oscillator signal output pins x1 and x2 to ensure that it can execute related instructions normally. Figure 2 shown.
[0045] The 32.768KHz crystal oscillator 3 includes a capacitor C3 with a capacitance of 10pF, and a capacitor C4 with a capacitance of 10pF is connected in parallel to the capacitor C3. The crystal oscillator, as a real-time clock crystal oscillator, generates an oscillation signal every 1 second. The parallel capacitors C3 and C4 filter the signal and transmit it to the central controller MCU (DPJ chip) through the crystal oscillator signal output pins XT1 and XT2 to ensure that it can accurately time, thereby realizing the real-time clock function. Figure 3 shown.
[0046] The E2 module unit 4 includes a working voltage input pin VCC, a capacitor C5 is connected in series to the working voltage input pin VCC, and the capacitor C5 is divided into two paths and connected in series to current limiting resistors R1 and R2 with the same resistance value of 4.7KΩ, respectively. The resistors R1 and R2 are connected in series to the E2 chip respectively. The timing signal output by the E2 chip through the clock signal output pin E2-SCL is passed to the central controller MCU1 after current limiting by resistor R1 and filtering by capacitor C5, thereby realizing the synchronous communication function with the central controller MCU1; the data signal output by the E2 chip through the data signal output pin E2-SDA is passed to the central controller MCU (DPJ chip) after current limiting by resistor R2 and filtering by capacitor C5, thereby realizing data communication with the central controller MCU1. Figure 4 shown.
[0047] The buzzer module unit 5 includes a voltage input pin VBAT, a sound amplitude input pin SGOA, and a sound frequency input pin SGOF. The voltage input pin VBAT is connected in series with a diode M7. The diode M7 is divided into two paths in series with a resistor R3 and a transistor Q1. The parallel circuit of the resistor R3 and the transistor Q1 is connected in series with a resistor R4. The resistor R4 is divided into two paths in series with a capacitor C6 and a player peripheral.
[0048] The sound amplitude input pin SGOA is connected in series with resistor R6, and the resistor R6 is divided into two paths of series connection with resistor R7 and transistor Q3, and the parallel circuit of the resistor R7 and transistor Q3 is connected in series with resistor R5; the sound frequency input pin SGOF is connected in series with resistor R8, and the resistor R8 is divided into two paths of series connection with resistor R9 and transistor Q2, and the parallel circuit of the resistor R9 and transistor Q2 is divided into two paths of series connection with diode M7 and player peripherals.
[0049] The buzzer module unit 5 receives the working voltage allocated by the instrument through the VBAT pin to make it work normally, and then receives the sound amplitude signal transmitted by the central controller MCU1 through the pin SGOA and the sound frequency signal transmitted by the central controller MCU1 through the pin SGOF. After the received amplitude and frequency signals are processed by the internal circuit, the sound signal is finally output through the external device such as the speaker. Figure 5 shown.
[0050] The CAN communication module unit 6 is connected to the external CAN communication device through the CAN-H bus and the CAN-L bus; it is connected to the central controller MCU1 through the RX-CAN pin and the TX-CAN pin. The CAN communication module unit communicates signals with the external CAN communication device through the CAN-H bus and the CAN-L bus, and transmits the external CAN signal to the central controller MCU1 through the RX-CAN pin; it receives the CAN signal transmitted by the central controller MCU1 through the TX-CAN pin, and transmits the signal to the external device through the CAN-H bus and the CAN-L bus. Figure 6 shown.
[0051] The light guide tape module unit 7 includes a voltage input pin VCC, a resistor R21 is connected in series to the pin VCC, the resistor R21 is connected in series to the light emitting diode LED1, 9 groups of completely identical resistors Rx (x: from 22 to 30) and diodes LEDx (x: from 2 to 10) are connected in parallel to the series circuit of the resistor R21 and the diode LED1 to form a parallel whole, the 10 groups of parallel wholes are connected in series to a transistor Q12, the transistor Q12 is connected in series to a resistor 32, and the resistor 32 is connected in series to a resistor 31.
[0052] When the voltage input pin VCC receives the working voltage assigned by the instrument, it lights up the light-emitting diode LED1 after being limited by the resistor R21. The same is true for the other 9 groups. The current output by the 10 parallel circuits is processed by the transistor Q12 and limited by the resistors R32 and R31. Then, it is transmitted to the central controller MCU1 from the pin BG-PWM2 as a PWM square wave signal to control the brightness of the LCD screen. Figure 7 shown.
[0053] The DC-DC conversion circuit unit 8 receives the 12V+ constant power supply from the outside through the pin circuit BAT, receives the ignition signal of the car through the pin circuit IGN, and is grounded through the EX-GND pin circuit. After the 12V+ constant power supply and the ignition signal are processed by the step-down chip MP1584EN and the internal conversion circuit inside the DC-DC conversion circuit unit 8, a voltage such as 5V+ or 3.3V+ suitable for the normal operation of various components on the instrument can be obtained, and the voltage is transmitted to various components on the instrument through the pin VCC. Figure 8 shown.
[0054] The VCC_1 pin on the LCD display interface unit 9 receives the working voltage assigned by the instrument to drive the LCD to work normally; the data signal transmitted by the central controller MCU1 is received through the data signal input pin LCD-SDA, and the clock signal transmitted by the central controller MCU1 is received through the clock signal input pin LCD-SCL, and then the received data signal and clock signal are used to drive the LCD to display relevant content. Fig. 9 shown.
[0055] The driver chip ME2656-A of the indicator light group A receives the lighting signal transmitted by the central controller MCU1 through the pin LED_SDI_A, receives the clock signal transmitted by the central controller MCU1 through the pin LED_CLK_A, and receives the control instruction transmitted by the central controller MCU1 through the pins LED_LE_A and LED_OE. The driver chip ME2656-A transmits the redundant lighting signal received from the central controller MCU1 to the driver chip ME2656-B through the data output pin LED_SDO_A. The driver chip ME2656-A of indicator light group A is connected to the receiving pin group LAOUTx (x: 0 to 15) of indicator light group A in a one-to-one correspondence, and lights up the corresponding indicator lights according to the lighting signal transmitted by the central controller MCU1; the driver chip ME2656-B of indicator light group B is connected to the receiving pin group LBOUTx (x: 0 to 15) of indicator light group B in a one-to-one correspondence, and lights up the corresponding indicator lights according to the lighting signal transmitted by the driver chip ME2656-A. The connection logic relationship and lighting logic relationship of the central controller MCU1, the driver chip ME2656-C, the indicator light group C, the driver chip ME2656-D, and the indicator light group D are the same as above. Fig.10 shown.
[0056] The low-level signal acquisition unit includes low-level acquisition ports A4, A5, A6, A7, and A8. The A4 acquisition port is connected in series with a diode D11. The diode D11 is divided into two paths and is respectively connected in series with a resistor R11 and a resistor R10. The resistor R10 is connected in series with a VCC_1 power supply circuit, and the resistor R11 is connected in series with a capacitor C7. The capacitor C7 is connected in series with a resistor R12. The capacitor C7 and the resistor R12 are connected in parallel with a wire.
[0057] When the A4 port collects a low level, it is unidirectionally conducted by the diode D11, and then limited by the resistor R11, filtered by the capacitor C7, and limited by the R12. The low level signal is transmitted to the central controller MCU1 through the output pin, and then processed by the central controller MCU1 as a lighting signal and transmitted to the corresponding light group driver chip ME2656-x (x is: A, B, C, D), and then the driver chip ME2656-x (x is: A, B, C, D) drives the corresponding indicator light to light up. The A5, A6, A7, A8 low level collection port circuit is the same as above. Fig.11 shown.
[0058] The parts not described in detail above are all prior art.
Claims
1. A circuit based on a Renesas DPJ chip, comprising a central controller MCU (1), an 8 MHz crystal oscillator (2), a 32.768 kHz crystal oscillator (3), an E2 module unit (4), a buzzer module unit (5), a CAN module unit (6), a light guide module unit (7), a DC-DC conversion circuit unit (8), a broken code LCD display interface unit (9), an LED lamp driver chip (10) and a low-level signal acquisition unit (11), wherein the central controller MCU (1) is connected to the DC-DC conversion circuit unit (8) via a VCC voltage input pin, the central controller MCU (1) is connected to the CAN module unit (6) via a CAN signal input pin Rx-CAN, and the central controller MCU (1) is connected to the buzzer module unit (5) via a sound amplitude output pin SGOF and a sound frequency output pin SGOA, characterized in that: The central controller MCU (1) is connected to an 8MHz crystal oscillator (2) via crystal oscillator signal input pins X1 and X2, the central controller MCU (1) is connected to a 32.768KHz crystal oscillator (3) via crystal oscillator signal input pins XT1 and XT2, the central controller MCU (1) is connected to an E2 module unit (4) via a data signal input pin E2-SCL and a clock signal input pin E2-SDA, the central controller MCU (1) is connected to a light guide band module unit (7) via a PWM square wave signal input pin BG-PWM2, the central controller MCU (1) is connected to a broken code LCD display interface unit (9) via a data signal output pin SDA and a clock signal output pin SCL, the central controller MCU (1) is connected to an LED lamp driver chip (10) via pins, and the central controller MCU (1) is connected to a low level signal acquisition unit (11) via input pins.
2. The circuit based on the Renesas DPJ chip according to claim 1, characterized in that: The 8MHz crystal oscillator comprises a capacitor C1 with a capacitance of 20pF, and a capacitor C2 with a capacitance of 20pF is connected in parallel to the capacitor C1.
3. The circuit based on the Renesas DPJ chip according to claim 1, characterized in that: The 32.768KHz crystal oscillator comprises a capacitor C3 with a capacitance of 10pF, a capacitor C4 with a capacitance of 10pF is connected in parallel to the capacitor C3, and the 32.768KHz crystal oscillator is a real-time clock crystal oscillator.
4. The circuit based on the Renesas DPJ chip according to claim 1, characterized in that: The E2 module unit (4) comprises a working voltage input pin VCC, a capacitor C5 is connected in series to the working voltage input pin VCC, the capacitor C5 is divided into two paths and connected in series with current limiting resistors R1 and R2 with the same resistance value of 4.7KΩ, respectively, and the resistors R1 and R2 are connected in series with the E2 chip respectively.
5. The circuit based on the Renesas DPJ chip according to claim 1, characterized in that: The buzzer module unit (5) comprises a voltage input pin VBAT, a sound amplitude input pin SGOA, and a sound frequency input pin SGOF. The voltage input pin VBAT is connected in series with a diode M7. The diode M7 is divided into two paths of series connection with a resistor R3 and a transistor Q1. The parallel circuit of the resistor R3 and the transistor Q1 is connected in series with a resistor R4. The resistor R4 is divided into two paths of series connection with a capacitor C6 and a player peripheral. The sound amplitude input pin SGOA is connected in series with a resistor R6. The resistor R6 is divided into two paths of series connection with a resistor R7 and a transistor Q3. The parallel circuit of the resistor R7 and the transistor Q3 is connected in series with a resistor R5. The sound frequency input pin SGOF is connected in series with a resistor R8. The resistor R8 is divided into two paths of series connection with a resistor R9 and a transistor Q2. The parallel circuit of the resistor R9 and the transistor Q2 is divided into two paths of series connection with a diode M7 and a player peripheral.
6. The circuit based on the Renesas DPJ chip according to claim 1, characterized in that: The light guide tape module unit (7) comprises a voltage input pin VCC, a resistor R21 is connected in series to the pin VCC, a light emitting diode LED1 is connected in series to the resistor R21, 9 groups of identical resistors Rx and diodes LEDx are connected in parallel to the series circuit of the resistor R21 and the diode LED1 to form a parallel whole, the parallel whole is connected in series to a transistor Q12, a resistor 32 is connected in series to the transistor Q12, and the resistor 32 is connected in series to a resistor 31.
7. The circuit based on the Renesas DPJ chip according to claim 1, characterized in that: The low-level signal acquisition unit (11) comprises low-level acquisition ports A4, A5, A6, A7 and A8, the A4 acquisition port is connected in series with a diode D11, the diode D11 is divided into two paths and connected in series with a resistor R11 and a resistor R10 respectively, the resistor R10 is connected in series with a VCC_1 power supply circuit, the resistor R11 is connected in series with a capacitor C7, the capacitor C7 is connected in series with a resistor R12, and the capacitor C7 and the resistor R12 are connected in parallel with a wire.