Voice interaction circuit based on double Bluetooth

Abstract

The utility model provides a voice interaction circuit based on double Bluetooth, which comprises an instrument panel, a PCB (printed circuit board) fixing and mounting seat for fixedly mounting a PCB is arranged in the instrument panel, the PCB is fixedly mounted on the PCB fixing and mounting seat, and a power module, a control module, a Bluetooth module, a Bluetooth WIFI (wireless fidelity) module and a voice module are arranged on the PCB; the power supply module is respectively connected with the control module, the Bluetooth module and the Bluetooth WIFI module and supplies power to the control module, the Bluetooth module and the Bluetooth WIFI module; a Bluetooth data end of the control module is respectively connected with the Bluetooth module and the Bluetooth WIFI module, a WIFI data end of the control module is connected with the Bluetooth WIFI module, and a voice data transmission end of the control module is connected with a data transmission end of the voice module. According to the utility model, on the basis of Bluetooth connection, WIFI connection can also be realized, so that large data transmission functions such as map sharing, screen projection and the like can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of Bluetooth, in particular to a voice interaction circuit based on dual Bluetooth. Background Art

[0002] Dual Bluetooth control, or Bluetooth dual mode, means that it supports the Basic Rate (BR) and Enhanced Data Rate (EDR) of traditional Bluetooth, and also supports the latest Low Energy (LE) standard. Dual Bluetooth configuration can connect two devices at the same time, which can better adapt to different usage scenarios. However, a simple Bluetooth chip cannot achieve the transmission of large data. Utility Model Content

[0003] The utility model aims to at least solve the technical problems existing in the prior art, and in particular innovatively proposes a dual-Bluetooth-based voice interaction circuit.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a dual-Bluetooth-based voice interaction circuit, including an instrument panel, a PCB board fixing mounting seat for fixing a PCB board is arranged in the instrument panel, the PCB board is fixedly mounted on the PCB board fixing mounting seat, and a power module, a control module, a Bluetooth module, a Bluetooth WIFI module and a voice module are arranged on the PCB board;

[0005] The power module is respectively connected to the control module, the Bluetooth module and the Bluetooth WIFI module to supply power to the control module, the Bluetooth module and the Bluetooth WIFI module; the Bluetooth data end of the control module is respectively connected to the Bluetooth module and the Bluetooth WIFI module, the WIFI data end of the control module is connected to the Bluetooth WIFI module, and the voice data transmission end of the control module is connected to the data transmission end of the voice module.

[0006] Furthermore, the Bluetooth module includes:

[0007] The UART signal transmitting terminal UART_TX of the Bluetooth chip U36 is connected to the first end of the resistor R537 and the first end of the resistor R542.

[0008] The UART signal receiving terminal UART_RX of the Bluetooth chip U36 is connected to the first end of the resistor R541 and the first end of the resistor R538.

[0009] The second end of the resistor R537 and the second end of the resistor R538 are connected to the power supply OP_3V3, the second end of the resistor R542 is connected to the UART signal receiving terminal UA4_RX of the control chip, and the second end of the resistor R541 is connected to the UART signal sending terminal UA4_TX of the control chip;

[0010] The left earphone / speaker output HPLOUT of the Bluetooth chip U36 is connected to the first end of the capacitor C307, the second end of the capacitor C307 is connected to the first end of the resistor R506, the second end of the resistor R506 is connected to the first end of the capacitor C309, the first end of the resistor R508, and the first end of the capacitor C354, the second end of the resistor R508 and the second end of the capacitor C309 are connected to the power ground;

[0011] The right earphone / speaker output HPROUT of the Bluetooth chip U36 is connected to the first end of the capacitor C308, the second end of the capacitor C308 is connected to the first end of the resistor R507, the second end of the resistor R507 is connected to the first end of the capacitor C310, the first end of the resistor R509, and the first end of the capacitor C355, the second end of the resistor R509 and the second end of the capacitor C310 are connected to the power ground;

[0012] The reset terminal RESET of the Bluetooth chip U36 is connected to the first end of the resistor R470, and the second end of the resistor R470 is connected to the Bluetooth reset terminal of the control chip.

[0013] Furthermore, the Bluetooth module also includes:

[0014] The antenna terminal BT_ANT of the Bluetooth chip U36 is connected to the first end of the resistor R181 and the first end of the capacitor C124. The second end of the resistor R181 is connected to the first end of the capacitor C290 and the signal terminal SIG of the J5 antenna chip. The second end of the capacitor C124 and the second end of the capacitor C290 are connected to the power ground.

[0015] Furthermore, the Bluetooth WIFI module includes:

[0016] The CPU wake-up interrupt signal terminal WL_HOST_WAKE of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R226, and the second end of the resistor R226 is connected to the CPU wake-up interrupt signal terminal CCIR601_D0 / GPIO

[36] (IO) of the control chip.

[0017] The Bluetooth UART signal receiving terminal BT_UART_RX of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R276, the second end of the resistor R276 is connected to the first end of the resistor R233 and the first end of the resistor R190, and the second end of the resistor R190 is connected to the UART signal sending terminal UA2_TXD(O) of the control chip;

[0018] The Bluetooth UART signal transmitting end BT_UART_TX of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R277, the second end of the resistor R277 is connected to the first end of the resistor R234 and the first end of R192, and the second end of the resistor R192 is connected to the UART signal receiving end UA2_TXD(O) of the control chip;

[0019] The second end of the resistor R233, the second end of the resistor R234, the first end of the resistor R286, and the first end of the resistor R287 are connected to the power supply VDD_IO_3V3;

[0020] The second end of the resistor R286 is connected to the first end of the resistor R278 and the first end of the resistor R193. The second end of the resistor R193 is connected to the Bluetooth control signal request sending end UA2_RTS_B(O) of the control chip.

[0021] The second end of the resistor R287 is connected to the first end of the resistor R279 and the first end of the resistor R194. The second end of the resistor R194 is connected to the Bluetooth control signal clearing sending terminal UA2_CTS_B(I)(1) of the control chip.

[0022] The second end of the resistor R278 is connected to the first end of the resistor R399 and the Bluetooth control signal request sending end UART_CTS of the Bluetooth WIFI chip U20.

[0023] The second end of the resistor R289 is connected to the first end of the resistor R400 and the Bluetooth control signal clearing sending terminal UART_RTS of the Bluetooth WIFI chip U20.

[0024] The second end of the resistor R399 and the second end of the resistor R400 are connected to the power ground;

[0025] The Bluetooth enable terminal BT_EN of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R240, and the second end of the resistor R240 and the first end of the resistor R280 are connected to the Bluetooth start terminal KEYSCAN2 of the control chip.

[0026] The WIFI enable terminal WL_EN of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R241, and the second end of the resistor R241 and the first end of the resistor R281 are connected to the WIFI start terminal CCIR601_D2 / GPIO

[38] (IO) of the control chip.

[0027] The normally closed contact terminal NC3 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R446, and the second end of the resistor R446, the second end of the resistor R280, and the second end of the resistor R281 are connected to the power supply VDD_IO_3V3;

[0028] The power supply terminal VCC_3V3 of the Bluetooth WIFI chip U20 is connected to the first end of the capacitor C142, the first end of the capacitor C143, the first end of the resistor R315, the first end of the capacitor C235, the first end of the inductor L18 and the power supply terminal of the external clock chip Y3, the second end of the resistor R315 is connected to the enable terminal of the external clock chip Y3 and the first end of the resistor R316, and the second end of the resistor R316 is connected to the power ground;

[0029] The ground terminal of the external clock chip Y3 is connected to the power ground, the clock output terminal of the external clock chip Y3 is connected to the first terminal of the capacitor C236, the second terminal of the capacitor C236 is connected to the first terminal of the capacitor C189, and the second terminal of the capacitor C189 is connected to the clock signal output terminal RTC_CLK of the Bluetooth WIFI chip U20.

[0030] The PCM data input terminal PCM_IN of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R225, and the second end of the resistor R225 is connected to the first end of the resistor R231 and the PCM data output terminal I2SIN_DOUT of the control chip.

[0031] The PCM data control terminal PCM_SYNC of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R227, and the second end of the resistor R227 is connected to the first end of the resistor R230 and the PCM data control terminal I2SIN_SYNC / LRCK of the control chip.

[0032] The PCM data output terminal PCM_OUT of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R228, and the second end of the resistor R228 is connected to the first end of the resistor R229 and the PCM data input terminal PCM data input terminal I2SIN_DIN of the control chip.

[0033] The PCM data clock signal terminal PCM_CLK of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R223, and the second end of the resistor R223 is connected to the first end of the resistor R232 and the PCM data clock signal terminal I2SIN_CLK / BCK of the control chip.

[0034] The second end of the resistor R229, the second end of the resistor R230, the second end of the resistor R231, and the second end of the resistor R232 are connected to the power supply VDD_IO_3V3;

[0035] The first power supply terminal VDD_PIO_1 of the parallel port, the second power supply terminal VDD_PIO_2 of the parallel port, the first end of the capacitor C140, the first end of the capacitor C137, the first end of the capacitor C352, and the first end of the inductor L17 are connected to the power supply VDD_IO_3V3, the second end of the capacitor C140 and the second end of the capacitor C137 are connected to the power ground, and the second end of the inductor L17 and the second end of the inductor L18 are connected to the power supply WB3.3V;

[0036] The SDIO data terminal SDIO_D0 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R221, and the second end of the resistor R221 is connected to the first end of the resistor R217.

[0037] The SDIO data terminal SDIO_D1 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R220, and the second end of the resistor R220 is connected to the first end of the resistor R216.

[0038] The SDIO data terminal SDIO_D2 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R219, and the second end of the resistor R219 is connected to the first end of the resistor R213.

[0039] The SDIO data terminal SDIO_D3 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R218, and the second end of the resistor R218 is connected to the first end of the resistor R212.

[0040] The input clock signal terminal SDIO_CLK of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R2830, the second end of the resistor R2830 is connected to the first end of the resistor R283 and the first end of the capacitor C190, and the second end of the capacitor C190 is connected to the power ground;

[0041] The SDIO command input terminal SDIO_CMD of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R284, and the second end of the resistor R284 is connected to the first end of the resistor R285.

[0042] The second end of the resistor R217, the second end of the resistor R216, the second end of the resistor R213, the second end of the resistor R212, the second end of the resistor R283, and the second end of the resistor R283 are connected to VDD_IO_3V3;

[0043] The antenna terminal BT_ANT of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R275 and the first end of the capacitor C136, the second end of the resistor R275 and the first end of the capacitor C135 are connected to the signal terminal SIG of the antenna chip J10, and the second end of the capacitor C135 and the second end of the capacitor C136 are connected to the power ground.

[0044] Furthermore, the Bluetooth module also includes a power amplifier chip:

[0045] The right channel OP negative input -INR terminal of the power amplifier chip U38 is connected to the first end of the capacitor C332, the first end of the resistor R518, and the first end of the capacitor C333. The second end of the capacitor C332 is connected to the first end of the resistor R519, the first end of the resistor R512, and the right channel OP output terminal OUTR of the power amplifier chip U38. The second end of the resistor R519 is connected to the first end of the capacitor C321 and the first end of the capacitor C320. The second end of the capacitor C321 is connected to the power ground. The second end of the capacitor C320 is connected to the microphone differential input positive electrode MIC_1P of the Bluetooth chip U36. The second end of the capacitor C333 is connected to the power ground.

[0046] The second end of the resistor R512 is connected to the first end of the resistor R520, the second end of the resistor R518, and the first end of the capacitor C334, and the second end of the capacitor C334 is connected to the power ground;

[0047] The second end of the resistor R520 is connected to the first end of the resistor R521 and the first end of the capacitor C335, and the second end of the capacitor C335 is connected to the power ground;

[0048] The second end of the resistor R521 is connected to the first end of the capacitor C336, and the second end of the capacitor C336 is connected to the audio digital-to-analog output terminal ADAC_L0 / I2SO_BCK of the control chip.

[0049] The negative electrode CN of the charging pump flying capacitor of the Bluetooth chip U36 is connected to the first end of the capacitor C331, and the negative electrode CN of the charging pump flying capacitor of the Bluetooth chip U36 is connected to the second end of the capacitor C331;

[0050] The left channel OP negative input -INL terminal of the power amplifier chip U38 is connected to the first end of the capacitor C337, the first end of the capacitor C338, and the first end of the resistor R522. The second end of the resistor R522 is connected to the first end of the resistor R524, the first end of the resistor R523, and the first end of the capacitor C356. The second end of the resistor R524 is connected to the first end of the resistor R525 and the first end of the capacitor C340. The second end of the resistor R525 is connected to the first end of the capacitor C341. The second end of the capacitor C341 is connected to the microphone differential input positive electrode MIC_1P of the Bluetooth chip U36; the second end of the capacitor C340, the second end of the capacitor C356, and the second end of the capacitor C338 are connected to the power ground;

[0051] The second end of the capacitor C337, the second end of the resistor R523, and the first end of the resistor R513 are connected to the left channel OP output terminal OUTL of the power amplifier chip U38, the second end of the resistor R513 is connected to the first end of the capacitor C323 and the first end of the capacitor C322, the second end of the capacitor C323 is connected to the microphone differential input negative electrode MIC_1N of the Bluetooth chip U36, and the second end of the capacitor C323 is connected to the power ground;

[0052] The power supply terminal PVSS of the power amplifier chip U38 is connected to the first end of the capacitor C324, and the second end of the capacitor C324 is connected to the power ground.

[0053] Since the audio signal of Soc is too small, it needs to be amplified and filtered. Therefore, it is realized through the power amplifier chip.

[0054] Furthermore, the power module includes a voltage stabilizing module, through which the Bluetooth module and the power amplifier chip are powered; the voltage stabilizing module includes:

[0055] The power input terminal VIN of the voltage stabilizing chip U39 is connected to the first end of the capacitor C325 and the first end of the capacitor C326, the second end of the capacitor C325 and the second end of the capacitor C326 are connected to the power ground, the enable terminal EN of the voltage stabilizing chip U39 is connected to the first end of the resistor R514, the second end of the resistor R514 is connected to the power control terminal GPIO_INT / SD_SEN of the control chip, the feedback terminal FB of the voltage stabilizing chip U39 is connected to the first end of the resistor R516, the first end of the resistor R517, and the first end of the capacitor C327, the second end of the resistor R516, the second end of the capacitor C327, the first end of the capacitor C328, the first end of the capacitor C329, and the first end of the capacitor C330 are connected to the power output terminal VOUT of the voltage stabilizing chip U39,

[0056] A second end of the resistor R517, a second end of the capacitor C328, a second end of the capacitor C329, and a second end of the capacitor C330 are connected to the power ground.

[0057] Furthermore, the control chip is a SoC chip.

[0058] To sum up, due to the adoption of the above-mentioned technical solution, the utility model can realize WIFI connection on the basis of Bluetooth connection, thereby realizing map sharing, screen projection and other data-intensive transmission functions, greatly enriching the usage scenarios and user experience.

[0059] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0061] Figure 1 It is a connection diagram of the utility model.

[0062] Figure 2 It is a schematic diagram of the circuit connection of the SoC chip of the utility model.

[0063] Figure 3 This is a schematic diagram of the circuit connection of the Bluetooth WIFI chip of the utility model.

[0064] Figure 4 This is a schematic diagram of the Bluetooth chip circuit connection of the utility model.

[0065] Figure 5 It is a schematic diagram of the circuit connection of the power amplifier chip of the utility model.

[0066] Figure 6 This is a schematic diagram of the connection of the voltage stabilizing chip circuit of the utility model. DETAILED DESCRIPTION

[0067] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0068] The utility model proposes a dual-Bluetooth based voice interaction circuit such as Figure 1 As shown, it includes a Bluetooth WIFI chip, a Bluetooth chip, and a system-on-chip SoC, and the SoC is connected to the Bluetooth WIFI chip and the Bluetooth chip respectively.

[0069] The Bluetooth WIFI chip is preferably RG440, which is a WIFI+BT two-in-one module and can be connected to a mobile phone.

[0070] The preferred Bluetooth chip is QA960 chip, which is a pure Bluetooth module that can connect to helmets and other devices.

[0071] The SOC chip is preferably 8368U, which is installed on the PCB circuit board of the instrument equipment.

[0072] A wireless connection or a point-to-point communication connection is established between a mobile terminal with Bluetooth and WIFI functions and a Bluetooth WIFI chip, and the mobile terminal is connected to the Internet through a wireless connection; data transmission or control functions are realized through a point-to-point communication connection.

[0073] WIFI connection has greater advantages than Bluetooth connection. WIFI has faster transmission speed and can transmit large amounts of data more efficiently. In addition, WIFI has a longer transmission distance and can cover a larger range. In addition, the security is relatively high and requires encryption and authentication. In actual applications, large amounts of data transmission such as sharing maps and screen projection must be achieved through WIFI transmission.

[0074] Figure 2 This is a schematic diagram of the SoC chip circuit connection of the utility model. It can be seen that in addition to being connected to the Bluetooth WIFI chip U20 and the Bluetooth chip U36, it is also connected to the MCU, crystal oscillator, TFT, USB, etc.

[0075] Figure 3 This is a schematic diagram of the circuit connection of the Bluetooth WIFI chip of the utility model. The wake-up CPU interrupt signal terminal WL_HOST_WAKE of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R226, and the second end of the resistor R226 is connected to the wake-up CPU interrupt signal terminal CCIR601_D0 / GPIO

[36] (IO) of the SoC chip.

[0076] The Bluetooth UART signal receiving terminal BT_UART_RX of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R276, the second end of the resistor R276 is connected to the first end of the resistor R233 and the first end of the resistor R190, and the second end of the resistor R190 is connected to the UART signal transmitting terminal UA2_TXD(O) of the SoC chip;

[0077] The Bluetooth UART signal transmitting end BT_UART_TX of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R277, the second end of the resistor R277 is connected to the first end of the resistor R234 and the first end of R192, and the second end of the resistor R192 is connected to the UART signal receiving end UA2_TXD(O) of the SoC chip;

[0078] The second end of the resistor R233, the second end of the resistor R234, the first end of the resistor R286, and the first end of the resistor R287 are connected to the power supply VDD_IO_3V3;

[0079] The second end of the resistor R286 is connected to the first end of the resistor R278 and the first end of the resistor R193. The second end of the resistor R193 is connected to the Bluetooth control signal request sending end UA2_RTS_B(O) of the SoC chip.

[0080] The second end of the resistor R287 is connected to the first end of the resistor R279 and the first end of the resistor R194. The second end of the resistor R194 is connected to the Bluetooth control signal clearing sending terminal UA2_CTS_B (I) (1) of the SoC chip.

[0081] The second end of the resistor R278 is connected to the first end of the resistor R399 and the Bluetooth control signal request sending end UART_CTS of the Bluetooth WIFI chip U20.

[0082] The second end of the resistor R289 is connected to the first end of the resistor R400 and the Bluetooth control signal clearing sending terminal UART_RTS of the Bluetooth WIFI chip U20.

[0083] The second end of the resistor R399 and the second end of the resistor R400 are connected to the power ground.

[0084] The Bluetooth enable terminal BT_EN of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R240, and the second end of the resistor R240 and the first end of the resistor R280 are connected to the Bluetooth start terminal KEYSCAN2 of the SoC chip.

[0085] The WIFI enable terminal WL_EN of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R241, and the second end of the resistor R241 and the first end of the resistor R281 are connected to the WIFI start terminal CCIR601_D2 / GPIO

[38] (IO) of the SoC chip.

[0086] The normally closed contact terminal NC3 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R446, and the second end of the resistor R446, the second end of the resistor R280, and the second end of the resistor R281 are connected to the power supply VDD_IO_3V3.

[0087] The power supply terminal VCC_3V3 of the Bluetooth WIFI chip U20 is connected to the first end of the capacitor C142, the first end of the capacitor C143, the first end of the resistor R315, the first end of the capacitor C235, the first end of the inductor L18 and the power supply terminal of the external clock chip Y3, the second end of the resistor R315 is connected to the enable terminal of the external clock chip Y3 and the first end of the resistor R316, and the second end of the resistor R316 is connected to the power ground;

[0088] The ground terminal of the external clock chip Y3 is connected to the power ground, the clock output terminal of the external clock chip Y3 is connected to the first terminal of the capacitor C236, the second terminal of the capacitor C236 is connected to the first terminal of the capacitor C189, and the second terminal of the capacitor C189 is connected to the clock signal output terminal RTC_CLK of the Bluetooth WIFI chip U20.

[0089] The PCM data input terminal PCM_IN of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R225, and the second end of the resistor R225 is connected to the first end of the resistor R231 and the PCM data output terminal I2SIN_DOUT of the SoC chip.

[0090] The PCM data control terminal PCM_SYNC of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R227, and the second end of the resistor R227 is connected to the first end of the resistor R230 and the PCM data control terminal I2SIN_SYNC / LRCK of the SoC chip.

[0091] The PCM data output terminal PCM_OUT of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R228, and the second end of the resistor R228 is connected to the first end of the resistor R229 and the PCM data input terminal PCM data input terminal I2SIN_DIN of the SoC chip.

[0092] The PCM data clock signal terminal PCM_CLK of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R223, and the second end of the resistor R223 is connected to the first end of the resistor R232 and the PCM data clock signal terminal I2SIN_CLK / BCK of the SoC chip.

[0093] A second end of the resistor R229 , a second end of the resistor R230 , a second end of the resistor R231 , and a second end of the resistor R232 are connected to the power source VDD_IO_3V3 .

[0094] The first power supply terminal VDD_PIO_1 of the parallel port, the second power supply terminal VDD_PIO_2 of the parallel port, the first end of the capacitor C140, the first end of the capacitor C137, the first end of the capacitor C352, and the first end of the inductor L17 are connected to the power supply VDD_IO_3V3, the second end of the capacitor C140 and the second end of the capacitor C137 are connected to the power ground, and the second end of the inductor L17 and the second end of the inductor L18 are connected to the power supply WB3.3V;

[0095] The SDIO data terminal SDIO_D0 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R221, and the second end of the resistor R221 is connected to the first end of the resistor R217.

[0096] The SDIO data terminal SDIO_D1 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R220, and the second end of the resistor R220 is connected to the first end of the resistor R216.

[0097] The SDIO data terminal SDIO_D2 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R219, and the second end of the resistor R219 is connected to the first end of the resistor R213.

[0098] The SDIO data terminal SDIO_D3 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R218, and the second end of the resistor R218 is connected to the first end of the resistor R212.

[0099] The input clock signal terminal SDIO_CLK of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R2830, the second end of the resistor R2830 is connected to the first end of the resistor R283 and the first end of the capacitor C190, and the second end of the capacitor C190 is connected to the power ground;

[0100] The SDIO command input terminal SDIO_CMD of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R284, and the second end of the resistor R284 is connected to the first end of the resistor R285.

[0101] The second end of the resistor R217, the second end of the resistor R216, the second end of the resistor R213, the second end of the resistor R212, the second end of the resistor R283, and the second end of the resistor R283 are connected to VDD_IO_3V3.

[0102] The antenna terminal BT_ANT of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R275 and the first end of the capacitor C136, the second end of the resistor R275 and the first end of the capacitor C135 are connected to the signal terminal SIG of the antenna chip J10, and the second end of the capacitor C135 and the second end of the capacitor C136 are connected to the power ground.

[0103] Figure 4 This is a schematic diagram of the circuit connection of the Bluetooth chip of the utility model. The UART signal transmitting end UART_TX of the Bluetooth chip U36 is connected to the first end of the resistor R537 and the first end of the resistor R542.

[0104] The UART signal receiving terminal UART_RX of the Bluetooth chip U36 is connected to the first end of the resistor R541 and the first end of the resistor R538.

[0105] The second end of the resistor R537 and the second end of the resistor R538 are connected to the power supply OP_3V3, the second end of the resistor R542 is connected to the UART signal receiving terminal UA4_RX of the SoC chip, and the second end of the resistor R541 is connected to the UART signal transmitting terminal UA4_TX of the SoC chip;

[0106] The left earphone / speaker output HPLOUT of the Bluetooth chip U36 is connected to the first end of the capacitor C307, the second end of the capacitor C307 is connected to the first end of the resistor R506, the second end of the resistor R506 is connected to the first end of the capacitor C309, the first end of the resistor R508, and the first end of the capacitor C354, the second end of the resistor R508 and the second end of the capacitor C309 are connected to the power ground;

[0107] The right earphone / speaker output HPROUT of the Bluetooth chip U36 is connected to the first end of the capacitor C308, the second end of the capacitor C308 is connected to the first end of the resistor R507, the second end of the resistor R507 is connected to the first end of the capacitor C310, the first end of the resistor R509, and the first end of the capacitor C355, the second end of the resistor R509 and the second end of the capacitor C310 are connected to the power ground;

[0108] The antenna terminal BT_ANT of the Bluetooth chip U36 is connected to the first end of the resistor R181 and the first end of the capacitor C124. The second end of the resistor R181 is connected to the first end of the capacitor C290 and the signal terminal SIG of the J5 antenna chip. The second end of the capacitor C124 and the second end of the capacitor C290 are connected to the power ground.

[0109] The reset terminal RESET of the Bluetooth chip U36 is connected to the first end of the resistor R470, and the second end of the resistor R470 is connected to the Bluetooth reset terminal of the SoC chip.

[0110] Figure 5 It is a schematic diagram of the circuit connection of the power amplifier chip of the utility model, the right channel OP negative input -INR terminal of the power amplifier chip U38 is connected to the first end of the capacitor C332, the first end of the resistor R518, and the first end of the capacitor C333, the second end of the capacitor C332 is connected to the first end of the resistor R519, the first end of the resistor R512, and the right channel OP output terminal OUTR of the power amplifier chip U38, the second end of the resistor R519 is connected to the first end of the capacitor C321 and the first end of the capacitor C320, the second end of the capacitor C321 is connected to the power ground, the second end of the capacitor C320 is connected to the microphone differential input positive electrode MIC_1P of the Bluetooth chip U36, and the second end of the capacitor C333 is connected to the power ground;

[0111] The second end of the resistor R512 is connected to the first end of the resistor R520, the second end of the resistor R518, and the first end of the capacitor C334, and the second end of the capacitor C334 is connected to the power ground;

[0112] The second end of the resistor R520 is connected to the first end of the resistor R521 and the first end of the capacitor C335, and the second end of the capacitor C335 is connected to the power ground;

[0113] The second end of the resistor R521 is connected to the first end of the capacitor C336, and the second end of the capacitor C336 is connected to the audio digital-to-analog output terminal ADAC_L0 / I2SO_BCK of the SoC chip.

[0114] The negative electrode CN of the charging pump flying capacitor of the Bluetooth chip U36 is connected to the first end of the capacitor C331, and the negative electrode CN of the charging pump flying capacitor of the Bluetooth chip U36 is connected to the second end of the capacitor C331;

[0115] The left channel OP negative input -INL terminal of the power amplifier chip U38 is connected to the first end of capacitor C337, the first end of capacitor C338, and the first end of resistor R522. The second end of resistor R522 is connected to the first end of resistor R524, the first end of resistor R523, and the first end of capacitor C356. The second end of resistor R524 is connected to the first end of resistor R525 and the first end of capacitor C340. The second end of resistor R525 is connected to the first end of capacitor C341. The second end of capacitor C341 is connected to the microphone differential input positive electrode MIC_1P of the Bluetooth chip U36; the second end of capacitor C340, the second end of capacitor C356, and the second end of capacitor C338 are connected to the power ground.

[0116] The second end of the capacitor C337, the second end of the resistor R523, and the first end of the resistor R513 are connected to the left channel OP output terminal OUTL of the power amplifier chip U38, the second end of the resistor R513 is connected to the first end of the capacitor C323 and the first end of the capacitor C322, the second end of the capacitor C323 is connected to the microphone differential input negative electrode MIC_1N of the Bluetooth chip U36, and the second end of the capacitor C323 is connected to the power ground;

[0117] The power supply terminal PVSS of the power amplifier chip U38 is connected to the first end of the capacitor C324, and the second end of the capacitor C324 is connected to the power ground.

[0118] Figure 6 This is a schematic diagram of the circuit connection of the voltage stabilizing chip of the utility model. The voltage stabilizing chip U39 converts the voltage of 5V into 3.3V to power the power amplifier chip U38 and the Bluetooth chip U36. The power input terminal VIN of the voltage stabilizing chip U39 is connected to the first end of the capacitor C325 and the first end of the capacitor C326. The second end of the capacitor C325 and the second end of the capacitor C326 are connected to the power ground. The enable terminal EN of the voltage stabilizing chip U39 is connected to the first end of the resistor R514. The second end of the resistor R514 is connected to the power control terminal GPIO_INT / SD_SEN of the SoC chip. The feedback terminal FB of the voltage stabilizing chip U39 is connected to the first end of the resistor R516, the first end of the resistor R517, and the first end of the capacitor C327. The second end of the resistor R516, the second end of the capacitor C327, the first end of the capacitor C328, the first end of the capacitor C329, and the first end of the capacitor C330 are connected to the power output terminal VOUT of the voltage stabilizing chip U39.

[0119] A second end of the resistor R517, a second end of the capacitor C328, a second end of the capacitor C329, and a second end of the capacitor C330 are connected to the power ground.

[0120] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A dual-Bluetooth-based voice interaction circuit, including a dashboard, characterized in that: The instrument panel is provided with a PCB board fixing mounting seat for fixing and mounting a PCB board, the PCB board is fixedly mounted on the PCB board fixing mounting seat, and a power module, a control module, a Bluetooth module, a Bluetooth WIFI module and a voice module are arranged on the PCB board; The power module is respectively connected to the control module, the Bluetooth module and the Bluetooth WIFI module to supply power to the control module, the Bluetooth module and the Bluetooth WIFI module; the Bluetooth data end of the control module is respectively connected to the Bluetooth module and the Bluetooth WIFI module, the WIFI data end of the control module is connected to the Bluetooth WIFI module, and the voice data transmission end of the control module is connected to the data transmission end of the voice module.

2. A dual-Bluetooth based voice interaction circuit according to claim 1, characterized in that: The bluetooth module comprises: The UART signal transmitting terminal UART_TX of the Bluetooth chip U36 is connected to the first end of the resistor R537 and the first end of the resistor R542. The UART signal receiving terminal UART_RX of the Bluetooth chip U36 is connected to the first end of the resistor R541 and the first end of the resistor R538. The second end of the resistor R537 and the second end of the resistor R538 are connected to the power supply OP_3V3, the second end of the resistor R542 is connected to the UART signal receiving terminal UA4_RX of the control chip, and the second end of the resistor R541 is connected to the UART signal sending terminal UA4_TX of the control chip; The left earphone / speaker output HPLOUT of the Bluetooth chip U36 is connected to the first end of the capacitor C307, the second end of the capacitor C307 is connected to the first end of the resistor R506, the second end of the resistor R506 is connected to the first end of the capacitor C309, the first end of the resistor R508, and the first end of the capacitor C354, the second end of the resistor R508 and the second end of the capacitor C309 are connected to the power ground; The right earphone / speaker output HPROUT of the Bluetooth chip U36 is connected to the first end of the capacitor C308, the second end of the capacitor C308 is connected to the first end of the resistor R507, the second end of the resistor R507 is connected to the first end of the capacitor C310, the first end of the resistor R509, and the first end of the capacitor C355, the second end of the resistor R509 and the second end of the capacitor C310 are connected to the power ground; The reset terminal RESET of the Bluetooth chip U36 is connected to the first end of the resistor R470, and the second end of the resistor R470 is connected to the Bluetooth reset terminal of the control chip.

3. A dual-Bluetooth based voice interaction circuit according to claim 2, characterized in that: The bluetooth module also includes: The antenna terminal BT_ANT of the Bluetooth chip U36 is connected to the first end of the resistor R181 and the first end of the capacitor C124. The second end of the resistor R181 is connected to the first end of the capacitor C290 and the signal terminal SIG of the J5 antenna chip. The second end of the capacitor C124 and the second end of the capacitor C290 are connected to the power ground.

4. The dual-Bluetooth-based voice interaction circuit according to claim 1, characterized in that: The Bluetooth WIFI module includes: The CPU wake-up interrupt signal terminal WL_HOST_WAKE of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R226, and the second end of the resistor R226 is connected to the CPU wake-up interrupt signal terminal CCIR601_D0 / GPIO[36](IO) of the control chip. The Bluetooth UART signal receiving terminal BT_UART_RX of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R276, the second end of the resistor R276 is connected to the first end of the resistor R233 and the first end of the resistor R190, and the second end of the resistor R190 is connected to the UART signal sending terminal UA2_TXD(O) of the control chip; The Bluetooth UART signal transmitting end BT_UART_TX of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R277, the second end of the resistor R277 is connected to the first end of the resistor R234 and the first end of R192, and the second end of the resistor R192 is connected to the UART signal receiving end UA2_TXD(O) of the control chip; The second end of the resistor R233, the second end of the resistor R234, the first end of the resistor R286, and the first end of the resistor R287 are connected to the power supply VDD_IO_3V3; The second end of the resistor R286 is connected to the first end of the resistor R278 and the first end of the resistor R193. The second end of the resistor R193 is connected to the Bluetooth control signal request sending end UA2_RTS_B(O) of the control chip. The second end of the resistor R287 is connected to the first end of the resistor R279 and the first end of the resistor R194. The second end of the resistor R194 is connected to the Bluetooth control signal clearing sending terminal UA2_CTS_B(I)(1) of the control chip. The second end of the resistor R278 is connected to the first end of the resistor R399 and the Bluetooth control signal request sending end UART_CTS of the Bluetooth WIFI chip U20. The second end of the resistor R289 is connected to the first end of the resistor R400 and the Bluetooth control signal clearing sending terminal UART_RTS of the Bluetooth WIFI chip U20. The second end of the resistor R399 and the second end of the resistor R400 are connected to the power ground; The Bluetooth enable terminal BT_EN of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R240, and the second end of the resistor R240 and the first end of the resistor R280 are connected to the Bluetooth start terminal KEYSCAN2 of the control chip. The WIFI enable terminal WL_EN of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R241, and the second end of the resistor R241 and the first end of the resistor R281 are connected to the WIFI start terminal CCIR601_D2 / GPIO[38](IO) of the control chip. The normally closed contact terminal NC3 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R446, and the second end of the resistor R446, the second end of the resistor R280, and the second end of the resistor R281 are connected to the power supply VDD_IO_3V3; The power supply terminal VCC_3V3 of the Bluetooth WIFI chip U20 is connected to the first end of the capacitor C142, the first end of the capacitor C143, the first end of the resistor R315, the first end of the capacitor C235, the first end of the inductor L18 and the power supply terminal of the external clock chip Y3, the second end of the resistor R315 is connected to the enable terminal of the external clock chip Y3 and the first end of the resistor R316, and the second end of the resistor R316 is connected to the power ground; The ground terminal of the external clock chip Y3 is connected to the power ground, the clock output terminal of the external clock chip Y3 is connected to the first terminal of the capacitor C236, the second terminal of the capacitor C236 is connected to the first terminal of the capacitor C189, and the second terminal of the capacitor C189 is connected to the clock signal output terminal RTC_CLK of the Bluetooth WIFI chip U20. The PCM data input terminal PCM_IN of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R225, and the second end of the resistor R225 is connected to the first end of the resistor R231 and the PCM data output terminal I2SIN_DOUT of the control chip. The PCM data control terminal PCM_SYNC of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R227, and the second end of the resistor R227 is connected to the first end of the resistor R230 and the PCM data control terminal I2SIN_SYNC / LRCK of the control chip. The PCM data output terminal PCM_OUT of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R228, and the second end of the resistor R228 is connected to the first end of the resistor R229 and the PCM data input terminal PCM data input terminal I2SIN_DIN of the control chip. The PCM data clock signal terminal PCM_CLK of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R223, and the second end of the resistor R223 is connected to the first end of the resistor R232 and the PCM data clock signal terminal I2SIN_CLK / BCK of the control chip. The second end of the resistor R229, the second end of the resistor R230, the second end of the resistor R231, and the second end of the resistor R232 are connected to the power supply VDD_IO_3V3; The first power supply terminal VDD_PIO_1 of the parallel port, the second power supply terminal VDD_PIO_2 of the parallel port, the first end of the capacitor C140, the first end of the capacitor C137, the first end of the capacitor C352, and the first end of the inductor L17 are connected to the power supply VDD_IO_3V3, the second end of the capacitor C140 and the second end of the capacitor C137 are connected to the power ground, and the second end of the inductor L17 and the second end of the inductor L18 are connected to the power supply WB3.3V; The SDIO data terminal SDIO_D0 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R221, and the second end of the resistor R221 is connected to the first end of the resistor R217. The SDIO data terminal SDIO_D1 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R220, and the second end of the resistor R220 is connected to the first end of the resistor R216. The SDIO data terminal SDIO_D2 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R219, and the second end of the resistor R219 is connected to the first end of the resistor R213. The SDIO data terminal SDIO_D3 of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R218, and the second end of the resistor R218 is connected to the first end of the resistor R212. The input clock signal terminal SDIO_CLK of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R2830, the second end of the resistor R2830 is connected to the first end of the resistor R283 and the first end of the capacitor C190, and the second end of the capacitor C190 is connected to the power ground; The SDIO command input terminal SDIO_CMD of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R284, and the second end of the resistor R284 is connected to the first end of the resistor R285. The second end of the resistor R217, the second end of the resistor R216, the second end of the resistor R213, the second end of the resistor R212, the second end of the resistor R283, and the second end of the resistor R283 are connected to VDD_IO_3V3; The antenna terminal BT_ANT of the Bluetooth WIFI chip U20 is connected to the first end of the resistor R275 and the first end of the capacitor C136, the second end of the resistor R275 and the first end of the capacitor C135 are connected to the signal terminal SIG of the antenna chip J10, and the second end of the capacitor C135 and the second end of the capacitor C136 are connected to the power ground.

5. The dual-Bluetooth-based voice interaction circuit according to claim 1, characterized in that: The Bluetooth module also includes a power amplifier chip: The right channel OP negative input -INR terminal of the power amplifier chip U38 is connected to the first end of the capacitor C332, the first end of the resistor R518, and the first end of the capacitor C333. The second end of the capacitor C332 is connected to the first end of the resistor R519, the first end of the resistor R512, and the right channel OP output terminal OUTR of the power amplifier chip U38. The second end of the resistor R519 is connected to the first end of the capacitor C321 and the first end of the capacitor C320. The second end of the capacitor C321 is connected to the power ground. The second end of the capacitor C320 is connected to the microphone differential input positive electrode MIC_1P of the Bluetooth chip U36. The second end of the capacitor C333 is connected to the power ground. The second end of the resistor R512 is connected to the first end of the resistor R520, the second end of the resistor R518, and the first end of the capacitor C334, and the second end of the capacitor C334 is connected to the power ground; The second end of the resistor R520 is connected to the first end of the resistor R521 and the first end of the capacitor C335, and the second end of the capacitor C335 is connected to the power ground; The second end of the resistor R521 is connected to the first end of the capacitor C336, and the second end of the capacitor C336 is connected to the audio digital-to-analog output terminal ADAC_L0 / I2SO_BCK of the control chip. The negative electrode CN of the charging pump flying capacitor of the Bluetooth chip U36 is connected to the first end of the capacitor C331, and the negative electrode CN of the charging pump flying capacitor of the Bluetooth chip U36 is connected to the second end of the capacitor C331; The left channel OP negative input -INL terminal of the power amplifier chip U38 is connected to the first end of the capacitor C337, the first end of the capacitor C338, and the first end of the resistor R522. The second end of the resistor R522 is connected to the first end of the resistor R524, the first end of the resistor R523, and the first end of the capacitor C356. The second end of the resistor R524 is connected to the first end of the resistor R525 and the first end of the capacitor C340. The second end of the resistor R525 is connected to the first end of the capacitor C341. The second end of the capacitor C341 is connected to the microphone differential input positive electrode MIC_1P of the Bluetooth chip U36; the second end of the capacitor C340, the second end of the capacitor C356, and the second end of the capacitor C338 are connected to the power ground; The second end of the capacitor C337, the second end of the resistor R523, and the first end of the resistor R513 are connected to the left channel OP output terminal OUTL of the power amplifier chip U38, the second end of the resistor R513 is connected to the first end of the capacitor C323 and the first end of the capacitor C322, the second end of the capacitor C323 is connected to the microphone differential input negative electrode MIC_1N of the Bluetooth chip U36, and the second end of the capacitor C323 is connected to the power ground; The power supply terminal PVSS of the power amplifier chip U38 is connected to the first end of the capacitor C324, and the second end of the capacitor C324 is connected to the power ground.

6. The dual-Bluetooth based voice interaction circuit according to claim 1, characterized in that: The power module includes a voltage stabilizing module, which supplies power to the Bluetooth module and the power amplifier chip; the voltage stabilizing module includes: The power input terminal VIN of the voltage stabilizing chip U39 is connected to the first end of the capacitor C325 and the first end of the capacitor C326, the second end of the capacitor C325 and the second end of the capacitor C326 are connected to the power ground, the enable terminal EN of the voltage stabilizing chip U39 is connected to the first end of the resistor R514, the second end of the resistor R514 is connected to the power control terminal GPIO_INT / SD_SEN of the control chip, the feedback terminal FB of the voltage stabilizing chip U39 is connected to the first end of the resistor R516, the first end of the resistor R517, and the first end of the capacitor C327, the second end of the resistor R516, the second end of the capacitor C327, the first end of the capacitor C328, the first end of the capacitor C329, and the first end of the capacitor C330 are connected to the power output terminal VOUT of the voltage stabilizing chip U39, A second end of the resistor R517, a second end of the capacitor C328, a second end of the capacitor C329, and a second end of the capacitor C330 are connected to the power ground.

7. A dual-Bluetooth based voice interaction circuit according to any one of claims 2, 4 to 6, characterized in that: The control chip is a SoC chip.

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