Data export circuit based on interface switching

Abstract

The utility model discloses a data export circuit based on interface switching, which comprises a solid state disk and a CPU (central processing unit), the CPU is connected with the solid state disk through an SATA (serial advanced technology attachment) interface, and the data export circuit further comprises an SATA-USB (serial advanced technology attachment-universal serial bus) circuit module which comprises an SATA-USB controller chip; the SATA switching circuit module comprises a high-speed electronic change-over switch, and the CPU controls the high-speed electronic change-over switch to switch the SATA interface of the solid state disk to the SATA interface of the SATA to USB controller chip; the SATA switching circuit module is connected with the SATA to USB circuit module and is used for converting an SATA interface of the SATA to USB controller chip into a USB interface; and the ESD protection circuit module is connected with the SATA to USB circuit module through the USB interface and comprises an ESD protection chip, and the ESD protection chip is used for performing interface protection on the led-out USB signal. By using the acquisition and storage device as an independent device, the external host can directly read and copy the data in the hard disk through the USB3.0 interface, and does not need to transfer and cache through a CPU, so that the data transmission speed is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted equipment data export, in particular to a data export circuit based on interface switching. Background Art

[0002] As an important component of the vehicle, data acquisition equipment can collect and store information such as the vehicle's operating status, equipment switching quantities, equipment monitoring parameters, bus task parameters, etc. in real time, providing data support for vehicle fault diagnosis and health management.

[0003] At present, most data acquisition devices are designed with solid-state hard disks with SATA3.0 interfaces as data storage media. Compared with traditional storage media, the use of modular solid-state hard disks can greatly improve data reading and writing speeds. At the same time, it also has higher reliability, larger storage space, lower power consumption and smaller size. There are no moving parts inside, and there is no risk of data loss due to vibration, collision and other problems. It can meet the application requirements of most occasions to the greatest extent. However, the solid-state hard disk is installed inside the acquisition device, and it needs to be equipped with a display interface or Ethernet interface to view and export data.

[0004] Therefore, it is of great significance to study a data export solution based on interface switching when the data acquisition device has no display interface or the embedded system is a desktop-free system. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a data export circuit based on interface switching, including a solid state drive and a CPU, wherein the CPU is connected to the solid state drive through a solid state drive SATA interface, and further includes:

[0006] A SATA to USB circuit module, comprising a SATA to USB controller chip, wherein the SATA to USB controller chip has a SATA to USB controller chip SATA interface;

[0007] A SATA switching circuit module, comprising a high-speed electronic switching switch, wherein the CPU controls the high-speed electronic switching switch to switch the SATA interface of the solid-state hard disk to the SATA interface of the SATA to USB controller chip; the SATA switching circuit module is connected to the SATA to USB circuit module to convert the SATA interface of the SATA to USB controller chip to a USB interface; and

[0008] The ESD protection circuit module is connected to the SATA to USB circuit module via the USB interface. The ESD protection circuit module includes an ESD protection chip. The ESD protection chip performs interface protection on the derived USB signal.

[0009] Furthermore, the model of the SATA to USB controller chip is INIC3610E.

[0010] Furthermore, the SATA to USB circuit module can provide USB2.0 / USB3.0 / USB3.1 / UART / SATA interface.

[0011] Furthermore, the ESD protection circuit module can provide an ESD protection voltage of 25 kV.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. Compared with the traditional data export scheme, the utility model uses the acquisition storage device as an independent device. The external host can directly read and copy the data in the solid-state hard disk through the USB3.0 interface without the need for CPU transfer cache, which can provide faster data transmission speed. When the data acquisition device has no display interface or the embedded system is a desktop-free system, a new and more convenient data export scheme can be provided.

[0014] 2. The SATA to USB circuit module in the utility model can provide interfaces including USB2.0 / USB3.1 / UART / SATA, and has flexible and programmable GPIO, which can realize SPI, UART, and PWM control. It can be expanded according to actual applications and is suitable for different application occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall design block diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the SATA switching circuit in the present utility model;

[0017] Figure 3 This is a schematic diagram of the SATA to USB3.0 interface circuit in the utility model;

[0018] Figure 4 It is the principle diagram of the ESD protection circuit in the utility model.

[0019] In the figure: 1. CPU; 2. Solid-state drive; 3. SATA to USB circuit module; 4. SATA switching circuit module; 5. ESD protection circuit module. DETAILED DESCRIPTION

[0020] In order to make the technical scheme and technical effect of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments.

[0021] like Figure 1 As shown, the utility model provides a data export circuit based on interface switching, which mainly includes a SATA switching circuit module 4, a SATA to USB circuit module 3 and an ESD protection circuit module 5. Among them, the SATA switching circuit module 4 includes a high-speed electronic switching switch, and the CPU1 controls the high-speed electronic switching switch to switch the solid-state hard disk SATA interface to the SATA to USB controller chip SATA interface. The SATA to USB circuit module 3 also includes a SATA to USB controller chip, and the SATA to USB controller chip has a SATA to USB controller chip SATA interface. Preferably, the model of the SATA to USB controller chip is INIC3610E. The SATA to USB circuit module 3 is connected to the SATA switching circuit module 4 to convert the SATA to USB controller chip SATA interface to a USB interface. The ESD protection circuit module 5 is connected to the SATA to USB circuit module 3 via a USB interface, and the ESD protection circuit module 5 includes an ESD protection chip, and the ESD protection chip performs interface protection on the derived USB signal.

[0022] The technical principle of the utility model is as follows:

[0023] Under normal use, CPU1 is connected to SSD 2 through SSD SATA interface, and CPU1 can write various collected data information into SSD 2 through SATA interface. When the user needs to query or export the stored data, CPU1 controls the high-speed electronic switch in SATA switching circuit module 4 through GPIO to switch the SATA interface, and switches the SSD SATA interface to the SATA interface of INIC3610E SATA to USB controller chip, so as to directly convert the SSD SATA interface into USB3.0 interface for data export.

[0024] like Figure 2In the schematic diagram of the SATA switching circuit shown in the figure, the high-speed electronic switching switch selects the channel switching through the channel selection signal SEL. The SEL pin is designed to be connected to the CPU GPIO interface in the circuit, and is pulled high by default through the pull-up resistor. After power-on, the A and C channels are connected, that is, the solid-state hard disk 2 is connected to the CPU through the SATA interface. At this time, the CPU can store various types of collected data in the solid-state hard disk 2 through the SATA interface. When data export is required, the CPU can pull down the channel selection pin SEL through the GPIO output low level, and at this time, the solid-state storage disk SATA interface is switched to the SATA to USB3.0 circuit. The SATA switching circuit module 4 mainly completes the switching of the SATA interface, and controls the solid-state hard disk SATA interface to be connected to the CPU or to the SATA interface of the SATA to USB controller chip through the high-speed electronic switching switch according to actual needs.

[0025] like Figure 3 The schematic diagram of the SATA to USB3.0 interface circuit shown in the figure shows that when data is exported, the solid state drive 2 is connected to the SATA to USB3.0 circuit through the SATA switching circuit, and the conversion chip INIC3610E converts the SATA interface to the USB3.0 interface, so that the solid state drive 2 can be accessed through the USB3.0 interface. When data is exported, the USB3.0 high-speed interface is used, and the theoretical maximum transmission rate reaches 3Gbps. The SATA to USB interface circuit module 4 mainly completes the conversion between the SATA interface and the USB3.0 interface, and converts the SATA interface of the solid state drive to the USB3.0 interface for data export.

[0026] like Figure 4 The schematic diagram of the ESD protection circuit shown in the figure uses an ESD protection chip to perform interface protection on the USB3.0 signal derived from the SATA to USB3.0 circuit. The circuit can be applied to USB2.0 / USB3.0 / Ethernet / HDMI 1.4 / high-speed serial interface, etc., and provides an ESD protection voltage of up to 25kV. The main function of the ESD protection circuit module 5 is to perform interface protection on the derived USB3.0 signal through the ESD protection chip.

[0027] Compared with the traditional data export scheme, the utility model regards the acquisition storage device as an independent device. The external host can directly read and copy the data in the hard disk through the USB3.0 interface without the need for CPU transfer cache, which can provide faster data transmission speed. When the data acquisition device has no display interface or the embedded system is a desktop-free system, a new and more convenient data export scheme can be provided; and the SATA to USB circuit module 3 can provide interfaces including USB2.0 / USB3.1 / UART / SATA, and has flexible and programmable GPIO, which can realize SPI, UART, and PWM control, and can be expanded according to actual applications, suitable for different application occasions.

[0028] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A data export circuit based on interface switching, comprising a CPU (1) and a solid state hard disk (2), wherein the CPU (1) is connected to the solid state hard disk (2) via a solid state hard disk SATA interface, and characterized in that: Also includes: A SATA to USB circuit module (3), comprising a SATA to USB controller chip, wherein the SATA to USB controller chip has a SATA to USB controller chip SATA interface; The SATA switching circuit module (4) comprises a high-speed electronic switching switch, wherein the CPU (1) controls the high-speed electronic switching switch to switch the SATA interface of the solid-state hard disk to the SATA interface of the SATA-to-USB controller chip; the SATA switching circuit module (4) is connected to the SATA-to-USB circuit module (3) to convert the SATA interface of the SATA-to-USB controller chip to a USB interface; as well as The ESD protection circuit module (5) is connected to the SATA to USB circuit module (3) via the USB interface. The ESD protection circuit module (5) comprises an ESD protection chip, and the ESD protection chip performs interface protection on the derived USB signal.

2. The data export circuit based on interface switching according to claim 1, characterized in that: The model of the SATA to USB controller chip is INIC3610E.

3. The data export circuit based on interface switching according to claim 1, characterized in that: The SATA to USB circuit module (3) can provide a USB2.0 / USB3.0 / USB3.1 / UART / SATA interface.

4. The data export circuit based on interface switching according to claim 1, characterized in that: The ESD protection circuit module (5) can provide an ESD protection voltage of 25 kV.

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