Multipath serial port communication circuit

Abstract

The utility model discloses a multipath serial port communication circuit, which comprises a first chip, a first interface, a second interface, a third interface and a fourth interface, a pin 5 of the first chip is connected with a pin 2 of the fourth interface, a pin 8 of the first chip is connected with a pin 3 of the fourth interface, a pin 7 of the first chip is connected with a pin 2 of the third interface, and a pin 11 of the first chip is connected with a pin 3 of the third interface; a pin 18 of the first chip is connected with a pin 10 of the second interface, and a pin 22 of the first chip is connected with a pin 11 of the second interface; the utility model has the beneficial effects that the simple interface circuit is combined with the serial port chip, so that the requirements of special functions of developers are met, and the design cost is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted audio testing, in particular to a multi-channel serial port communication circuit. Background Art

[0002] During the use of automotive electronic systems, car driving recorders and car audio equipment are widely integrated into the system. Currently, the serial communication test equipment for car audio is mainly single-channel. In the Volkswagen CRS3.0 project, our company requires the simultaneous serial communication between the SOC and MCU of the device in the CRS3.0 test system according to the requirements of developers and product features.

[0003] The effect that needs to be achieved is as follows: when the device is connected to J2 through FPC, the serial port printing information of SOC and MCU can be read out simultaneously on the host computer. For this purpose, we propose a multi-channel serial port communication circuit. Utility Model Content

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a multi-channel serial port communication circuit, the purpose of which is to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above object, the present utility model is implemented through the following technical solutions: a multi-channel serial communication circuit, comprising a first chip, a first interface, a second interface, a third interface, and a fourth interface;

[0006] Pin 5 of the first chip is connected to pin 2 of the fourth interface, pin 8 of the first chip is connected to pin 3 of the fourth interface, pin 7 of the first chip is connected to pin 2 of the third interface, and pin 11 of the first chip is connected to pin 3 of the third interface;

[0007] Pin 18 of the first chip and pin 10 of the second interface, and pin 22 of the first chip and pin 11 of the second interface;

[0008] Pin 7 of the first interface is connected to pin 4 of the second interface;

[0009] Pin 4 of the first interface is connected to pin 7 of the second interface;

[0010] Pin 3 of the first interface is connected to pin 1 of the second interface;

[0011] Pin 2 of the first interface is connected to pin 6 of the second interface;

[0012] Pin 1 of the first interface is connected to pin 9 of the second interface;

[0013] Pin 12 of the first interface is connected to pin 5 of the second interface.

[0014] Preferably, pins 2 and 27 of the first chip are grounded, pins 8 and 9 of the first interface are grounded, pins 18, 19 and 20 of the second interface are grounded, pin 5 of the third interface is grounded, and pin 5 of the fourth interface is grounded.

[0015] Preferably, the power supply voltages of pin 14 of the first chip, pin 11 of the first interface, and pin 17 of the second interface are all 3.3V.

[0016] In summary, the present invention provides a multi-channel serial port communication circuit. Compared with the prior art, the present invention has the following advantages: the present invention combines a simple interface circuit with a serial port chip, thereby meeting the developer's special function requirements and optimizing the design cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the circuit connection between the first chip U1 and the second interface J2 of the present invention;

[0018] Figure 2 This is a circuit diagram of the first interface J1 of the present utility model;

[0019] Figure 3 This is a schematic diagram of the circuit of the second interface J3 of the present invention;

[0020] Figure 4 This is a circuit diagram of the fourth interface J4 of the present utility model; DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figures 1 to 4 As shown:

[0023] The utility model is as follows Figure 1 As shown, a multi-channel serial port communication circuit, a multi-channel serial port communication circuit includes a first chip U1, a first interface J1, a second interface J2, a third interface J3, and a fourth interface J4;

[0024] Pin 5 of the first chip U1 is connected to pin 2 of the fourth interface J4, pin 8 of the first chip U1 is connected to pin 3 of the fourth interface J4, pin 7 of the first chip U1 is connected to pin 2 of the third interface J3, and pin 11 of the first chip U1 is connected to pin 3 of the third interface J3;

[0025] Pin 18 of the first chip U1 and pin 10 of the second interface J2, and pin 22 of the first chip U1 and pin 11 of the second interface J2;

[0026] Pin 7 of the first interface J1 is connected to pin 4 of the second interface J2;

[0027] Pin 4 of the first interface J1 is connected to pin 7 of the second interface J2;

[0028] Pin 3 of the first interface J1 is connected to pin 1 of the second interface J2;

[0029] Pin 2 of the first interface J1 is connected to pin 6 of the second interface J2;

[0030] Pin 1 of the first interface J1 is connected to pin 9 of the second interface J2;

[0031] Pin 12 of the first interface J1 is connected to pin 5 of the second interface J2.

[0032] In at least one embodiment, pins 2 and 27 of the first chip U1 are grounded, pins 8 and 9 of the first interface J1 are grounded, pins 18, 19, and 20 of the second interface J2 are grounded, pin 5 of the third interface J3 is grounded, and pin 5 of the fourth interface J4 is grounded.

[0033] In at least one embodiment, the power supply voltages of pin 14 of the first chip U1 , pin 11 of the first interface J1 , and pin 17 of the second interface J2 are all 3.3V.

[0034] Prototype test example:

[0035] In the car audio test project, the test prototype is placed in the environment and connected to J2 through FPC. At this time, the Uart signals of SOC and MCU are connected to U1, and after data format conversion by U1, they are output to J4 and J3 respectively. By connecting J4 and J3 through a USB data cable, data can be read synchronously, and it is concluded that the circuit layout of this patent meets the design requirements.

[0036] The embodiments of the present invention are only used to illustrate the present invention and do not limit the scope of the claims. Other substantially equivalent alternatives that can be thought of by those skilled in the art are all within the protection scope of the present invention.

Claims

1. A multi-channel serial communication circuit, characterized in that: It includes a first chip (U1), a first interface (J1), a second interface (J2), a third interface (J3), and a fourth interface (J4); Pin 5 of the first chip (U1) is connected to pin 2 of the fourth interface (J4), pin 8 of the first chip (U1) is connected to pin 3 of the fourth interface (J4), pin 7 of the first chip (U1) is connected to pin 2 of the third interface (J3), and pin 11 of the first chip (U1) is connected to pin 3 of the third interface (J3); Pin 18 of the first chip (U1) and pin 10 of the second interface (J2), and pin 22 of the first chip (U1) and pin 11 of the second interface (J2); Pin 7 of the first interface (J1) is connected to pin 4 of the second interface (J2); Pin 4 of the first interface (J1) is connected to pin 7 of the second interface (J2); Pin 3 of the first interface (J1) is connected to pin 1 of the second interface (J2); Pin 2 of the first interface (J1) is connected to pin 6 of the second interface (J2); Pin 1 of the first interface (J1) is connected to pin 9 of the second interface (J2); Pin 12 of the first interface (J1) is connected to pin 5 of the second interface (J2).

2. A multi-channel serial communication circuit according to claim 1, characterized in that: Pins 2 and 27 of the first chip (U1) are grounded, pins 8 and 9 of the first interface (J1) are grounded, pins 18, 19, and 20 of the second interface (J2) are grounded, pin 5 of the third interface (J3) is grounded, and pin 5 of the fourth interface (J4) is grounded.

3. A multi-channel serial communication circuit according to claim 1, characterized in that: The power supply voltages of pin 14 of the first chip (U1), pin 11 of the first interface (J1), and pin 17 of the second interface (J2) are all 3.3V.

Images