CN219457152U - Vehicle-mounted MP3 player integrated circuit - Google Patents

Abstract

The utility model relates to the technical field of electronic circuits, and particularly discloses a vehicle-mounted MP3 player integrated circuit which comprises a singlechip main control circuit, a USB reading circuit, a key control circuit, a power management circuit, a Bluetooth interconnection circuit, an OLED display circuit, a tone quality improving circuit and a player circuit, wherein the USB reading circuit, the key control circuit, the power management circuit, the Bluetooth interconnection circuit, the OLED display circuit, the tone quality improving circuit and the player circuit are electrically connected with the singlechip main control circuit. According to the utility model, the USB reading circuit is arranged to access and read music data in the memory, the USB interface function is provided, the music playing is controlled through the key control circuit, and the audio signal is subjected to power amplification processing through the voice quality improving circuit, so that the interference of external signals is avoided, the voice quality is improved, the voice quality effect is good, and the user experience effect is good.

Description

Vehicle-mounted MP3 player integrated circuit

Technical Field

The utility model relates to the technical field of electronic circuits, in particular to an integrated circuit of a vehicle-mounted MP3 player.

Background

The vehicle-mounted MP3 player product is a modern trend product, is pursued and loved by a plurality of sound fever friends, gradually replaces the traditional MP3 by the remote control vehicle-mounted MP3 player and the electric vehicle MP3 player, and the vehicle is taken as a main transportation tool in the life, and is internally provided with the MP3 player. People like to enjoy wonderful music when driving, but when listening to a CD, the selection of songs is very inconvenient, the traditional vehicle-mounted audio system provided with the MP3 player can only play MP3 files stored on the disc, but cannot play music stored in a memory such as a flash memory, the function is single, the whole circuit structure is complex, the transmission mode of frequency modulation signals is used, the interference of surrounding frequency band signals is very easy, the output audio signals cannot be effectively processed, the sound quality is reduced in the transmission process, the sound quality effect is poor, and the user experience effect is poor.

Disclosure of Invention

The utility model aims to solve the technical problems, and aims to overcome the defects in the prior art, the integrated circuit of the vehicle-mounted MP3 player is provided, the USB reading circuit is arranged to access and read music data in the memory, the USB interface function is provided, the key control circuit is used for controlling music playing, and the tone quality improving circuit is arranged to perform power amplification processing on the audio signal, so that the interference of external signals is avoided, the tone quality is improved, the tone quality effect is good, and the user experience effect is good.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides a vehicle-mounted MP3 player integrated circuit, includes singlechip main control circuit, USB reading circuit, button control circuit, power management circuit, bluetooth interconnection circuit, OLED display circuit, tone quality promotion circuit and player circuit all with singlechip main control circuit electric connection.

Preferably, the singlechip main control circuit comprises a singlechip chip U2, a crystal oscillator X1, a serial program recording port P1, a capacitor C8, a capacitor C9 and a capacitor C10, wherein the crystal oscillator X1, the serial program recording port P1, the capacitor C8, the capacitor C9 and the capacitor C10 are all connected with the singlechip chip U2.

Preferably, the USB reading circuit includes a USB chip U3, a USB interface U6, a crystal oscillator Y1, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, and a diode D2, where the single chip microcomputer chip U2, the USB interface U6, the crystal oscillator Y1, the capacitor C4, the capacitor C5, the capacitor C6, the capacitor C7, and the diode D2 are all connected to the USB chip U3.

Preferably, the key control circuit includes a key S1, a key S2, a key S3, a key S4, a key S5, a resistor R2, a resistor R3, a resistor R4, a resistor R5, and a resistor R6, where the key S1, the key S2, the key S3, the key S4, the key S5, the resistor R2, the resistor R3, the resistor R4, the resistor R5, and the resistor R6 are all connected to the single chip microcomputer chip U2.

Preferably, the power management circuit includes a power management chip U1, a power input interface J1, a resistor R1, a capacitor C2, a capacitor C3, a voltage regulator tube D1, and a fuse F1, where the fuse F1 and the voltage regulator tube D1 are respectively connected with the resistor R1 and the power input interface J1, and the resistor R1, the capacitor C2, the capacitor C3, and the single chip microcomputer chip U2 are connected with the power management chip U1.

Preferably, the bluetooth interconnection circuit includes a bluetooth module U5, and a first pin, a fourth pin, a fifth pin and a sixth pin of the bluetooth module U5 are respectively connected with a forty-five pin, a twenty-second pin, a twenty-first pin and a forty-six pin of the single chip microcomputer chip U2.

Preferably, the OLED display circuit includes an OLED display screen U4, and a third pin and a fourth pin of the OLED display screen U4 are respectively connected with a forty-second pin and a forty-third pin of the single chip microcomputer chip U2.

Preferably, the sound quality improving circuit includes a power amplifier chip U8, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, and a buzzer LS1, where the resistor R14, the resistor R15, the capacitor C13, the capacitor C14, and the buzzer LS1 are all connected to the power amplifier chip U8, the resistor R12 and the resistor R13 are all connected to the capacitor C13, and the capacitor C11 and the capacitor C12 are respectively connected to the resistor R12 and the resistor R13.

Preferably, the player circuit includes an MP3 player chip U7 and a resistor R10, and the resistor R10, a capacitor C11, a capacitor C12, and a single chip microcomputer chip U2 are all connected to the MP3 player chip U7.

By adopting the technical scheme, the vehicle-mounted MP3 player integrated circuit provided by the utility model has the following beneficial effects: the USB reading circuit, the key control circuit, the power management circuit, the Bluetooth interconnection circuit, the OLED display circuit, the tone quality improving circuit and the player circuit in the vehicle-mounted MP3 player integrated circuit are electrically connected with the singlechip main control circuit, the USB reading circuit is arranged to access and read music data in the memory, the USB interface function is provided, the music data in the flash memory is conveniently accessed, the key control circuit is used for controlling music playing, and the singlechip main control circuit is used for outputting control signals to control the working states of the circuits; and circuit structure is comparatively simple, carries out the power amplifier processing to audio signal through setting up tone quality promotion circuit, avoids receiving the interference of external signal such as surrounding frequency channel signal, and audio signal obtains effectual processing to promote sound quality greatly, tone quality is effectual, and the function is diversified, and user experience is effectual.

Drawings

Fig. 1 is a schematic circuit diagram of the present utility model.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

As shown in fig. 1, in the circuit schematic diagram of the present utility model, the vehicle-mounted MP3 player integrated circuit includes a single chip microcomputer main control circuit, a USB read circuit, a key control circuit, a power management circuit, a bluetooth interconnection circuit, an OLED display circuit, a tone quality enhancing circuit, and a player circuit, where the USB read circuit, the key control circuit, the power management circuit, the bluetooth interconnection circuit, the OLED display circuit, the tone quality enhancing circuit, and the player circuit are electrically connected to the single chip microcomputer main control circuit. It can be understood that the singlechip main control circuit, the USB reading circuit, the key control circuit, the power management circuit, the Bluetooth interconnection circuit, the OLED display circuit, the tone quality improving circuit and the player circuit can be integrated on a PCB circuit board, and in practical application, the singlechip main control circuit, the USB reading circuit, the key control circuit, the power management circuit, the Bluetooth interconnection circuit, the OLED display circuit, the tone quality improving circuit and the player circuit can be installed in a vehicle-mounted MP3 player for use, and can work after being connected to an external power supply through a power line.

Specifically, the singlechip master control circuit comprises a singlechip chip U2, a crystal oscillator X1, a serial program recording port P1, a capacitor C8, a capacitor C9 and a capacitor C10, wherein the crystal oscillator X1, the serial program recording port P1, the capacitor C8, the capacitor C9 and the capacitor C10 are all connected with the singlechip chip U2. It can be understood that the SCM chip U2 adopts an STM32F103C8T6 chip, is a 32-bit microcontroller based on an ARM Cortex-M kernel STM32 series, has an operating frequency of 72mhz, and provides each working pin to connect each circuit, so that signals are accessed, processed and output, and the working state of each circuit is controlled. The above only list main circuit components and connection relations thereof, and the other circuit components and specific connection relations thereof are shown in the drawings, so that the utility model is not repeated, and the following is the same.

Specifically, the USB reading circuit includes a USB chip U3, a USB interface U6, a crystal oscillator Y1, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, and a diode D2, where the single chip microcomputer chip U2, the USB interface U6, the crystal oscillator Y1, the capacitor C4, the capacitor C5, the capacitor C6, the capacitor C7, and the diode D2 are all connected to the USB chip U3. It can be understood that the USB interface U6 is a universal USB interface, and is used for accessing a USB disk or other flash memories storing music data; the USB chip U3 adopts a CH340G chip, provides serial, parallel or IrDA interfaces through a USB bus, can provide a general MODEM signal, allows UART to be added to a computer, or converts the existing UART equipment into a USB interface.

Specifically, the key control circuit includes a key S1, a key S2, a key S3, a key S4, a key S5, a resistor R2, a resistor R3, a resistor R4, a resistor R5, and a resistor R6, where the key S1, the key S2, the key S3, the key S4, the key S5, the resistor R2, the resistor R3, the resistor R4, the resistor R5, and the resistor R6 are all connected to the single chip microcomputer U2, the above keys correspond to different key input signals, and the single chip microcomputer U2 can react to different key input signals. It can be understood that the number of the keys may be a plurality of keys, and is mainly set according to the functional requirement of the vehicle-mounted MP3 player, which is not limited by the present utility model.

Specifically, the power management circuit includes a power management chip U1, a power input interface J1, a resistor R1, a capacitor C2, a capacitor C3, a voltage regulator tube D1, and a fuse F1, where the fuse F1 and the voltage regulator tube D1 are respectively connected to the resistor R1 and the power input interface J1, and the resistor R1, the capacitor C2, the capacitor C3, and the single chip microcomputer chip U2 are connected to the power management chip U1. It will be appreciated that the power management chip U1 may be AMS1117-3.3V, and mainly outputs 3.3V power to supply power to each chip in the circuit, so as to maintain stable operation, and the power input interface J1 is connected to an external power supply.

Specifically, the bluetooth interconnection circuit includes a bluetooth module U5, where a first pin, a fourth pin, a fifth pin and a sixth pin of the bluetooth module U5 are respectively connected with a forty-five pin, a twenty-second pin, a twenty-first pin and a forty-six pin of the single chip microcomputer chip U2. It can be appreciated that the bluetooth module U5 is an HC-05 bluetooth module, and mainly performs bluetooth connection communication with a user mobile terminal such as a mobile phone or the like.

Specifically, the OLED display circuit includes an OLED display screen U4, where a third pin and a fourth pin of the OLED display screen U4 are respectively connected with a forty-second pin and a forty-third pin of the single chip microcomputer chip U2. It will be appreciated that the OLED display U4 may be a general OLED display or the like for displaying music information or operating status information of the vehicle-mounted MP3 player or the like.

Specifically, the sound quality improving circuit includes a power amplifier chip U8, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, and a buzzer LS1, wherein the resistor R14, the resistor R15, the capacitor C13, the capacitor C14, and the buzzer LS1 are all connected to the power amplifier chip U8, the resistor R12 and the resistor R13 are all connected to the capacitor C13, and the capacitor C11 and the capacitor C12 are respectively connected to the resistor R12 and the resistor R13. It can be understood that the power amplification chip U8 adopts 80028 power amplification chip for single-channel power amplification, the voltage value set by the sampling circuit is 1.15 v-1.65 v, the characteristics of low harmonic distortion and small noise crosstalk are achieved, and finally the audio signal is played through the buzzer LS 1.

Specifically, the player circuit includes an MP3 player chip U7 and a resistor R10, where the resistor R10, a capacitor C11, a capacitor C12, and a single chip microcomputer chip U2 are all connected to the MP3 player chip U7. It will be appreciated that the MP3 player chip U7 employs a JQ6500-MP3 chip, supporting all bit rate 11172-3 and ISO13813-3layer3 audio decoding, sample rate support (KHZ): 8/11.025; the method perfectly integrates the hard decoding of MP3 and WMV, simultaneously supports the driving of TF card, supports the direct updating of spiflash content of a computer, supports FAT16 and FAT32 file systems, and the like.

It can be understood that the utility model has reasonable design and unique structure, and provides USB interface function by arranging USB reading circuit to access and read the music data in the memory, and is convenient to access the music data in the flash memory, the music playing is controlled by the key control circuit, and the SCM main control circuit outputs control signals to control the working states of the circuits; and circuit structure is comparatively simple, carries out the power amplifier processing to audio signal through setting up tone quality promotion circuit, avoids receiving the interference of external signal such as surrounding frequency channel signal, and audio signal obtains effectual processing to promote sound quality greatly, tone quality is effectual, and the function is diversified, and user experience is effectual.

The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and yet fall within the scope of the utility model.

Claims (7)

1. An integrated circuit of a vehicle-mounted MP3 player, which is characterized in that: the Bluetooth voice quality control device comprises a singlechip main control circuit, a USB reading circuit, a key control circuit, a power management circuit, a Bluetooth interconnection circuit, an OLED display circuit, a voice quality improving circuit and a player circuit, wherein the USB reading circuit, the key control circuit, the power management circuit, the Bluetooth interconnection circuit, the OLED display circuit, the voice quality improving circuit and the player circuit are electrically connected with the singlechip main control circuit; the singlechip main control circuit comprises a singlechip chip U2, a crystal oscillator X1, a serial program recording port P1, a capacitor C8, a capacitor C9 and a capacitor C10, wherein the crystal oscillator X1, the serial program recording port P1, the capacitor C8, the capacitor C9 and the capacitor C10 are all connected with the singlechip chip U2; the Bluetooth interconnection circuit comprises a Bluetooth module U5, wherein a first pin, a fourth pin, a fifth pin and a sixth pin of the Bluetooth module U5 are respectively connected with a forty-five pin, a twenty-second pin, a twenty-first pin and a forty-six pin of the singlechip chip U2.

2. The vehicle-mounted MP3 player integrated circuit of claim 1, wherein: the USB reading circuit comprises a USB chip U3, a USB interface U6, a crystal oscillator Y1, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7 and a diode D2, wherein the single chip microcomputer chip U2, the USB interface U6, the crystal oscillator Y1, the capacitor C4, the capacitor C5, the capacitor C6, the capacitor C7 and the diode D2 are all connected with the USB chip U3.

3. The vehicle-mounted MP3 player integrated circuit of claim 1, wherein: the key control circuit comprises a key S1, a key S2, a key S3, a key S4, a key S5, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6, wherein the key S1, the key S2, the key S3, the key S4, the key S5, the resistor R2, the resistor R3, the resistor R4, the resistor R5 and the resistor R6 are all connected with the singlechip chip U2.

4. The vehicle-mounted MP3 player integrated circuit of claim 1, wherein: the power management circuit comprises a power management chip U1, a power input interface J1, a resistor R1, a capacitor C2, a capacitor C3, a voltage stabilizing tube D1 and a fuse F1, wherein the fuse F1 and the voltage stabilizing tube D1 are respectively connected with the resistor R1 and the power input interface J1, and the resistor R1, the capacitor C2, the capacitor C3 and the singlechip chip U2 are respectively connected with the power management chip U1.

5. The vehicle-mounted MP3 player integrated circuit of claim 1, wherein: the OLED display circuit comprises an OLED display screen U4, and a third pin and a fourth pin of the OLED display screen U4 are respectively connected with a forty-second pin and a forty-third pin of the singlechip chip U2.

6. The vehicle-mounted MP3 player integrated circuit of claim 1, wherein: the tone quality improving circuit comprises a power amplifier chip U8, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14 and a buzzer LS1, wherein the resistor R14, the resistor R15, the capacitor C13, the capacitor C14 and the buzzer LS1 are all connected with the power amplifier chip U8, the resistor R12 and the resistor R13 are all connected with the capacitor C13, and the capacitor C11 and the capacitor C12 are respectively connected with the resistor R12 and the resistor R13.

7. The vehicle-mounted MP3 player integrated circuit of claim 6, wherein: the player circuit comprises an MP3 player chip U7 and a resistor R10, wherein the resistor R10, a capacitor C11, a capacitor C12 and a singlechip chip U2 are all connected with the MP3 player chip U7.