CN220933447U

CN220933447U - Multifunctional expansion board based on COM-Express

Info

Publication number: CN220933447U
Application number: CN202322744316.9U
Authority: CN
Inventors: 荆嘉诚; 王超
Original assignee: Suzhou Yuankong Electronic Technology Co ltd
Current assignee: Suzhou Yuankong Electronic Technology Co ltd
Priority date: 2023-10-12
Filing date: 2023-10-12
Publication date: 2024-05-10
Anticipated expiration: 2033-10-12

Abstract

The utility model discloses a multifunctional expansion board based on COM-Express. The COM-Express-based multifunctional expansion board comprises: a COMe interface for connecting the core board; a display port module, a storage port module, an audio port module, a USB port module, a network port module, a serial port module and an input/output port module which are connected with the COMe interface; and an SMBUS interface, SMLINK interface, I2C interface and TPM interface connected with the COMe interface. The embodiment of the utility model can enrich the port types of the expansion board and improve the universality of the expansion board.

Description

Multifunctional expansion board based on COM-Express

Technical Field

The utility model relates to the technical field of information, in particular to a multifunctional expansion board based on COM-Express.

Background

In the field of rapidly developed information technology, a COM-Express expansion board is widely applied to various industries as a pluggable embedded computing platform. However, the existing COMe expansion board has limited functional ports, and cannot meet expansion requirements of different application scenes and different projects.

Disclosure of utility model

The utility model provides a multifunctional expansion board based on COM-Express, which enriches port types of the expansion board and improves universality of the expansion board.

The embodiment of the utility model provides a multifunctional expansion board based on COM-Express, which comprises:

a COMe interface for connecting the core board;

a display port module, a storage port module, an audio port module, a USB port module, a network port module, a serial port module and an input/output port module which are connected with the COMe interface;

And the external interface module comprises an SMBUS interface, a SMLINK interface, an I2C interface and a TPM interface which are connected with the COMe interface.

Optionally, the displayport module includes: the device comprises a DP interface, an HDMI interface, a VGA interface, an eDP interface, an LVDS interface, a DP-HDMI conversion circuit and an HDMI direct connection circuit;

The DP-HDMI conversion circuit and the HDMI direct connection circuit are connected between the COMe interface and the HDMI interface; the DP interface, the VGA interface, the eDP interface and the LVDS interface are all connected with the COMe interface, and the eDP interface and the LVDS interface are connected with the same terminal of the COMe interface.

Optionally, the storage port module includes: m.2, MINIPCIE and SATA interfaces; the M.2 interface is connected with the COMe interface;

the M.2 interface comprises an NGFF connector and four groups of PCIE connection ends connected with the NGFF connector; one group of PCIE connecting ends and MINIPCIE interfaces are connected with the same group of pins of the NGFF connector, and the other group of PCIE connecting ends and the SATA interfaces are connected with the same group of pins of the NGFF connector; the MINIPCIE interface is also connected with an SD CARD slot.

Optionally, the audio port module includes: an audio decoding chip connected with the COMe interface, and a microphone interface and an earphone interface connected with the audio decoding chip;

Or the audio port module includes: and an HDA interface connected with the COMe interface.

Optionally, the USB port module includes: a plurality of USB3.0 interfaces and a plurality of USB2.0 interfaces connected to the COMe interface;

And/or the number of the groups of groups,

The network port module includes: at least one RJ45 interface connected with the COMe interface;

And/or the number of the groups of groups,

The input/output port module includes: GPIO interface and TF cassette, GPIO interface and TF cassette connect the same terminal of COMe interface.

Optionally, the serial port module includes: the device comprises a COM conversion unit, a CAN conversion unit, two COM interfaces, a CAN interface and an interface selection circuit;

One of the COM interface and the CAN interface is connected with the interface selection circuit; the CAN conversion unit is connected between the interface selection circuit and the COMe interface; the COM conversion unit is respectively connected with the interface selection circuit, the COMe interface and the other COM interface.

Optionally, the COM-Express based multifunctional expansion board further includes: a power module;

The power module comprises an ATX power supply circuit, and the ATX power supply circuit comprises: the circuit comprises a first transistor, a first resistor, a pull-up resistor, a pull-down resistor, an RC delay unit and an output control unit; the control electrode of the first transistor is connected with a trigger signal output by an ATX power supply, and is respectively connected with the pull-up resistor and the pull-down resistor; the first electrode of the first transistor is grounded, and the second electrode of the first transistor is connected with a first power supply signal through the first resistor; the RC delay unit is connected between the second pole of the first transistor and the output control unit, and the output end of the output control unit is used as the output end of the ATX power supply circuit.

Optionally, the power module further includes: a DC power supply circuit;

The COM-Express-based multifunctional expansion board further comprises: and the power supply switching port is respectively connected with the direct-current power supply circuit and the ATX power supply circuit.

Optionally, the COM-Express based multifunctional expansion board further includes:

The system comprises a 5VSB disconnection port, a PWROK port, a plurality of power supply indicator lamps and a plurality of signal indicator lamps which are connected with the COMe interface, two PCIE slots which are connected with the COMe interface, and a BIOS base and an SPI pin which are connected with the same terminal of the COMe interface.

Optionally, a chassis ground and a signal ground are provided in the COM-Express based multifunctional expansion board, and the COM-Express based multifunctional expansion board further includes: EMC protection module; the EMC protection module includes an isolation capacitance and an isolation resistance connected in parallel between the chassis ground and the signal ground.

The COM-Express-based multifunctional expansion board provided by the embodiment of the utility model has rich functional interfaces, and particularly comprises a display port module, a storage port module, an audio port module, a USB port module, a network port module, a serial port module and an input/output port module, so that a user can freely customize interface configuration according to application scenes, and the integration of the interfaces enables the expansion board to meet various application requirements and provide diversified connection modes and data transmission capacity. Meanwhile, the SMBUS interface, SMLINK interface, I2C interface and TPM interface are led out from the expansion board, so that the interface functions of the expansion board are further enriched. Therefore, the flexibility and the expandability of the expansion board enable the expansion board to adapt to different types of application scenes and meet the requirements of different projects, and the expansion board can be applied to various industries such as industrial automation, intelligent transportation, medical equipment and the like.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a multifunctional expansion board based on COM-Express according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of another COM-Express-based multi-function expansion board according to an embodiment of the present utility model;

Fig. 3 is a schematic structural diagram of an external interface module according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a DP-to-HDMI conversion circuit according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of an HDMI direct-connection circuit according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a memory port module according to an embodiment of the present utility model;

fig. 7-8 are schematic structural diagrams of a serial port module according to an embodiment of the present utility model;

Fig. 9 is a schematic structural diagram of an ATX power supply circuit according to an embodiment of the present utility model;

Fig. 10 is a schematic structural diagram of an indicator lamp according to an embodiment of the present utility model;

Fig. 11 is a schematic structural diagram of an EMC protection module according to an embodiment of the utility model;

fig. 12 is a schematic structural diagram of another EMC protection module according to an embodiment of the utility model.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The embodiment of the utility model provides a multifunctional expansion board based on COM-Express, which comprises a plurality of functional interfaces, has higher universality and has wide application prospect in the fields of testing and computers. Fig. 1 is a schematic structural diagram of a multifunctional expansion board based on COM-Express according to an embodiment of the present utility model. Referring to fig. 1, the multifunctional expansion board includes: a COMe interface 10 for connecting the core board; a display port module 20, a storage port module 30, an audio port module 40, a USB port module 50, a network port module 60, a serial port module 70, and an input-output port module 80 connected with the COMe interface 10; and an external interface module 90. The external interface module 90 specifically includes an SMBUS interface 91, SMLINK interface 92, an I2C interface 93 and a TPM interface 94 connected to the COMe interface 10.

The expansion board may be, for example, a pluggable embedded computing platform. The COMe interface 10 may be used to connect computer boards that use the COM-Express protocol, standard ATX sizes, such as a core board that carries an Intel-based CPU, and may support three sizes, mini, compact and basic. The COMe interface 10 is used as a medium between each expansion interface in the expansion board and the core board, and each expansion interface performs signal transmission with the core board through the COMe interface 10. The COMe interface 10 may include a plurality of functional terminals, each of which may include a plurality of pins, where each functional terminal is respectively connected to each functional module of the expansion board and the expansion interface.

Illustratively, the display port module 20 may include a display interface such as a DP interface, an HDMI interface, a VGA interface, an LVDS interface, and an eDP interface. Storage port module 30 may include an m.2 interface, a SATA interface, and the like; the M.2 interface may support PCIE gen4 and SATA3.0 protocols, for example, and is compatible with MINIPCIE. The audio port module 40 may include an HDA interface, a microphone interface, an earphone interface, and the like. USB3.0 interfaces and USB2.0 interfaces may be included in USB port module 50. At least one gigabit portal may be included in network port module 60, and the specific number of portals may be determined based on core board resources. A COM interface, a CAN interface, and the like may be included in the serial port module 70. The input/output port module 80 may include a GPIO interface, a TF CARD socket, and the like. The SMBUS interfaces 91, SMLINK, 92 and the I2C interface 93 are arranged, which is equivalent to leading SMBUS, SMLINK and I2C buses in the COMe interface 10 out of an external interface, can be used for free configuration of users, and can be used for testers and clients to connect with external equipment according to actual use requirements by combining with a TPM interface, so that the configuration flexibility of the users is effectively improved.

The multifunctional expansion board based on COM-Express provided by the embodiment of the utility model has rich functional interfaces, and particularly comprises a display port module 20, a storage port module 30, an audio port module 40, a USB port module 50, a network port module 60, a serial port module 70 and an input/output port module 80, so that a user can freely customize interface configuration according to application scenes, and the integration of the interfaces enables the expansion board to meet various application requirements and provide diversified connection modes and data transmission capacity. Meanwhile, the external interfaces of the SMBUS interface 91, the SMLINK interface 92, the I2C interface 93 and the TPM interface 94 are led out from the expansion board, so that the interface functions of the expansion board are further enriched. Therefore, the flexibility and the expandability of the expansion board enable the expansion board to adapt to different types of application scenes and meet the requirements of different projects, and the expansion board can be applied to various industries such as industrial automation, intelligent transportation, medical equipment and the like.

FIG. 2 is a schematic diagram of another COM-Express-based multi-function expansion board according to an embodiment of the present utility model; fig. 3-12 show a specific arrangement of part of the interfaces in the multifunctional expansion board. The specific structure of the COM-Express based multi-function expansion board will be exemplarily described with reference to fig. 2 to 12.

The specific arrangement of the four external interfaces of the SMBUS interface 91, SMLINK interface 92, I2C interface 93 and TPM interface 94 is exemplarily given in fig. 3, and in conjunction with fig. 2, the SMBUS interface 91 may correspond to the SMBUS HEADER in fig. 2, the SMLINK interface 92 may correspond to the SMLINK HEADER in fig. 2, the I2C interface 93 may correspond to the I2C HEADER in fig. 2, and the TPM interface 94 may correspond to the TPM HEAFER AND debugin fig. 2.

With continued reference to fig. 2, in one embodiment, optionally, the displayport module comprises: a DP interface (i.e., display Port) 21, an HDMI interface 22, a VGA interface (i.e., VGA CONN) 23, an eDP interface 24, and an LVDS interface 25. Illustratively, the display portion may include 2-way DP, 1-way HDMI, 1-way VGA, and support LVDS and eDP compatible displays. Specifically, the eDP interface 24 and the LVDS interface 25 may share the same terminal of the COMe interface, and the eDP interface 24, the DP interface 21, the HDMI interface 22, and the VGA interface 23 are respectively connected to different terminals (or different pins) of the COMe interface, so that the display portion supports four types of display, and supports three display devices to display simultaneously.

The core board can control whether to skip the conversion chip to output signals according to actual requirements. For example, the core board may transmit the eDP signal directly to the expansion board for display via the eDP interface 24; or the core board may convert the eDP signal into an LVDS signal and transmit the LVDS signal to the expansion board for display through the LVDS interface 25.

For example, a DP-to-HDMI conversion circuit (see fig. 4 for a specific circuit) and an HDMI direct circuit (see fig. 5 for a specific circuit) may be provided on the expansion board. The DP-to-HDMI conversion circuit and the HDMI direct connection circuit are both connected between the COMe interface 10 and the HDMI interface 22. Specifically, referring to fig. 4, the HDMI line may use a DP-to-HDMI conversion chip UHA2, for example, an IT6563 chip, to convert the DP signal transmitted from the core board into an HDMI signal. Specifically, the DP-to-HDMI conversion chip UHA2 can support HDMI 2.0 signal output, and the chip can also adjust the swing of the output signal. Meanwhile, referring to fig. 5, in the embodiment of the present utility model, an HDMI direct-connection circuit is reserved on the expansion board, and the HDMI signal transmitted by the CPU of the core board can be directly output through the HDMI direct-connection circuit without using a conversion chip.

With continued reference to fig. 2, in one embodiment, optionally the storage port module includes: m.2 interfaces (i.e., m.2 ssd) 31, MINIPCIE interfaces 32, and SATA interfaces; the m.2 interface 31 may be configured to be compatible with MINIPCIE interface 32, connecting the same terminals of the COMe interface 10. And, the M.2 interface 31 can also be compatible with the SATA interface, and is connected with the same terminal of the COMe interface 10. MINIPCIE interface 32 may also be connected to SD CARD slot 34.

Referring to fig. 6, the m.2 lanes may support pcie x4 and SATA. Specifically, the m.2 interface includes an NGFF connector and four sets of PCIE connection terminals, namely PCIE1X4 to PCIE1X7, connected to the NGFF connector. When all four sets of PCIE connection ends access PCIE signals, the m.2 line is equivalent to implementing PCIE x4. One group of PCIE connecting ends are compatible with MINIPCIE interfaces and are connected with the same group of pins of the NGFF connector; for example, the third path PCIE and MINIPCIE may be set to be compatible. The other set of PCIE connection terminals and SATA interface are connected to the same set of pins of the NGFF connector, specifically, see two Colay design parts outlined by boxes in fig. 6, where the fourth path of signals may be configured as SATA or PCIE (PCIE 1X 4) through resistors. And, with continued reference to fig. 2, the SATA terminal of the come interface may directly lead out of the SATA port (i.e., SATA con×4) 33, and this portion may also be configured to be compatible with the SATA interface of the m.2 line, and may specifically be routed according to actual requirements. In practice, the hard disk may be connected to SATA port 33 or m.2 interface 31. In the circuit layout design of the expansion board, the signals can be split by adopting two compatible resistor pads, and the signal quality cannot be influenced.

The embodiment provides the design compatible with the M.2 interface 31 and the MINIPCIE interface 32, so that the configuration can be changed to test more commonly used interfaces during product development and test, and the problem that in the prior art, as too many interfaces cannot be integrated on one COMe expansion board, once certain functions need to be tested, the complex operation of replacing the carrier board is needed, and the test simplicity and the test result accuracy are ensured.

With continued reference to fig. 2, on the basis of the foregoing embodiments, optionally, two PCIE SLOTs connected to the COMe interface 10 may also be provided in the expansion board, which are respectively a PCIE 4 SLOT 101 and a PEG1 (X16) 102. The two PCIE slots can test the high-performance display card and the network card at the same time without interference, and have stronger applicability and core competitiveness compared with the existing COMe carrier plate.

With continued reference to fig. 2, in one embodiment, optionally the serial port module includes: COM interface and CAN interface (i.e., CAN HEADER) 72. Two COM interfaces, COM1 HEADER 711 and COM2 HEADER 712, respectively, are illustratively shown in fig. 2. The COM2 HEADER 712 may be compatible with the CAN interface 72, and may be connected to the same terminal of the COMe interface 10.

Specific arrangement of the serial port module may be seen in fig. 7 and 8, and in particular, the serial port module may include a COM conversion unit 74, a CAN conversion unit 75, two COM interfaces, one CAN interface 72, and an interface selection circuit 73. One of the COM interfaces (here, illustratively COM2 HEADER 712) and CAN interface 72 are connected to interface selection circuit 73 for compatibility setup; the CAN conversion unit 75 is connected between the interface selection circuit 73 and the COMe interface 10; the COM conversion unit 74 is connected to the interface selection circuit 73, the COMe interface 10, and another COM interface (here, the COM1 HEADER 711 is exemplified), respectively. The core of the COM conversion unit 74 is a COM conversion chip U15, specifically, a ZT3243LEEA RS232 level conversion chip may be used, where one UART signal and one CAN signal are designed to be compatible. The core of the CAN conversion unit 75 is a CAN conversion chip, and an F81251S chip may be used.

On the basis of the above embodiments, optionally, the COM-Express based multifunctional expansion board further includes: and the power supply module is used for supplying power to each functional structure of the expansion board. In particular, the power module may include an ATX power supply circuit and a DC power supply circuit to provide a dual power design so that the expansion board may be compatible with 12V single power supplied core boards and ATX powered core boards.

Specifically, referring to fig. 9, the atx power supply circuit may include: the transistor comprises a first transistor Q1, a first resistor R1, a pull-up resistor R11, a pull-down resistor R12, an RC delay unit 211 and an output control unit 212. The control electrode of the first transistor Q1 is connected to a trigger signal ATXPG output by the ATX power supply, and the control electrode of the first transistor Q1 is connected to a pull-up resistor R11 and a pull-down resistor R12 respectively; the pull-up resistor R11 is connected to +5VS power supply, and the pull-down resistor R12 is grounded. The first pole of the first transistor Q1 is grounded, and the second pole of the first transistor Q1 is connected to a first power signal (for example +5vsb) through a first resistor R1. The RC delay unit 211 is connected between the second pole of the first transistor Q1 and the output control unit 212, and the RC delay unit 211 may include a buffer resistor and a buffer capacitor. The output terminal of the output control unit 212 is used as an output terminal of the ATX power supply circuit, for example, outputs a +5vsus signal, and the output control unit 212 may be formed by combining a plurality of transistors, a plurality of resistors and a plurality of capacitors. The first transistor Q1 may be a MOS transistor, for example.

The 5V power supply switching circuit of this embodiment adopts ATXPG as a trigger signal, and reserves the pull-up resistor R11, the pull-down resistor R12 and the RC delay unit 211 to adjust the switching interval time, so as to prevent the excessive surge current caused by the capacitive load at the rear end of the 5V power-on moment.

Based on the above embodiments, optionally, the multifunctional expansion board based on COM-Express may further include: the power supply switching port is respectively connected with the direct-current power supply circuit and the ATX power supply circuit, and can realize power supply switching through a jumper wire.

Optionally, on the basis of the above embodiments, the COM-Express based multifunctional expansion board further includes: the 5VSB break port and PWROK port correspond to the provision of a plurality of functional jumper caps, such as the 5VSB open jumper cap and PWROK debug jumper cap. And, the expansion board may further include an SPI pin (i.e., SPI HEADER) 112 and a BIOS base (i.e., BIOS ROM) 111 connected to the COMe interface 10. Illustratively, SPI pin 112 and BIOS base 111 can be of compatible design, connecting the same terminals of COMe interface 10.

Optionally, on the basis of the above embodiments, the COM-Express based multifunctional expansion board further includes: a plurality of power indicator lights and a plurality of signal indicator lights connected to the COMe interface 10. Specific setting circuit of the indicator lamps referring to fig. 10, 5 power indicator lamps constituting a power state indicating unit 311 are shown in fig. 10, and can indicate the states of five power sources of +5vsb, +3vs, +5vs, +12vs, and +vcd, respectively. And, 4 signal indicator lamps are shown in fig. 10 to constitute a signal state indicating unit 312, which can indicate states of four signals, i.e., pcie_rstn, slp_s3#, slp_s4# and slp_s5#, respectively, which are derived from the core board, and can indicate a start-up process of the machine, for example.

With continued reference to fig. 2, in one embodiment, optionally the audio port module includes: an audio decoding chip 41, such as an ALC series audio decoding chip, coupled to the COMe interface 10, is coupled to the core board via the HDA signal to support compatible designs for 897, 888S, 888 and 663, and support LINE OUT and MIC IN. And the audio port module further includes a microphone interface and an earphone interface, such as MIC1 and LINEOUT1 interface 42, connected to the audio decoding chip 41. Or the audio port module includes: the HDA interface connected to the COMe interface 10, for example, provides HDA pins to the front panel of the machine.

With continued reference to fig. 2, in one embodiment, optionally the USB port module includes: a plurality of USB3.0 interfaces and a plurality of USB2.0 interfaces connected to the COMe interface 10, a 4-way USB3.0 interface and a 4-way USB2.0 interface are exemplarily shown in fig. 2, which may be disposed on a front panel of the host. The network port module may include: at least one RJ45 interface 61 connected to the COMe interface 10. The input-output port module may include: GPIO interface 81 and TF CARD holder (i.e., TF CARD) 82; the GPIO interface 81 and the TF card seat 82 may be designed to be compatible, and are connected to the same terminal of the COMe interface 10. Illustratively, the expansion board may include 8-way GPIO and TF compatible modules.

On the basis of the above embodiments, optionally, in order to prevent adverse reactions to signal quality and performance of the expansion board from being affected by high voltage or static electricity in the external environment after the expansion board is connected to the external device, an EMC protection module may be further disposed in the expansion board, and used as an EMC protection reserved line to isolate the chassis ground and the signal ground in the expansion board. Referring specifically to fig. 11, the emc shielding module 410 includes an isolation capacitor CS and an isolation resistor RS connected in parallel between the chassis ground GND1 and the signal ground GND 2. The EMC protection module 410 may be configured for any expansion interface (or coastline interface) to realize EMC protection of the interface, where the expansion interfaces that are not connected in the expansion board may be connected to the same or different signal grounds. And, referring to fig. 12, for all positioning HOLEs HOLE, an EMC protection module 410 may also be provided to achieve comprehensive protection of the expansion board. Illustratively, the isolation resistor RS may employ a 1Mohm resistor device.

The multifunctional expansion board based on COM-Express provided by the embodiment of the utility model is connected with the core board through a standard COMe interface, and the architecture of the whole system is as follows: the display part comprises 2 paths of DPs, 1 path of HDMIs and 1 path of VGAs, and supports compatible display of LVDS and eDP; the front panel has 8 USB interfaces, wherein USB3.0 and USB2.0 are four each; the audio part adopts an ALC series audio decoding chip, supports 897, 888S, 888 and 663 compatible designs, and comprises a microphone and an earphone interface; the mainboard is provided with 2 COM ports, wherein one port is compatible with the CAN port; simultaneously, the SMBUS, SMLINK and I2C buses in COMe are led out of an external interface, so that the external interface can be freely configured and used by a user; the network part provides 2 kilomega power network ports, and the M.2 interface can support PCIE gen4 and SATA3.0 protocols and is compatible with MINIPCIE; the main board also comprises 8 paths of compatible modules of GPIO and TF; SPI BIOS module. The design scheme also reserves a plurality of functional jumper caps, including 5VSB circuit breaker, PWROK enable, TYPE switches etc. The external input ATX or direct current 12V supplies power to the whole system.

Specifically, the expansion board is designed as follows:

the display scheme is as follows:

The LVDS/eDP part adopts the signal definition common to LVDS and eDP, and the jump cap switching can support the eDP and LVDS display screens which are mainstream in the market. The VGA part can be connected between the VGA interface and the COMe interface by adopting a double pi type filtering line so as to ensure the stability of the displayed picture. The HDMI part can be converted from DP by using an IT6563 chip, and can support HDMI 2.0 signal output.

Audio port scheme:

ALC888/888S chip is used and connected with the core board through HDA signals to support LINE OUT and MICIN, and HDA pins can be further included.

USB port scheme:

Setting 4 paths of USB2.0 and 4 paths of USB3.0 interfaces by using USB2.0 and USB3.2 signals of COM-Express; the PI3EQX1004E can also be used as a driver chip, and is connected between the USB interface and the COMe interface, so that the functions of supplying power, waking up and the like in a standby state can be supported; the 1-path USB2.0 interface can be compatible with the MINIPCIE interface and is connected with the same terminal of the COMe interface.

4G &5g port scheme:

And MINIPCIE interfaces are adopted, so that the system is compatible with 4G and 5G modules, and is additionally provided with an SD CARD slot.

LAN scheme:

kilomega power network port, RJ45 interface, with EMC protection.

Storage interface scheme:

The M.2 2280 interface is connected to the core board through PCIE X4 signals or SATA3.0 signals, so that the compatible use of the functions of the M.2 2280SATA SSD and the M.2 2280NVME X4 SSD is realized; the expansion board may include a CLK Buffer chip for providing clock signals for m.2, PCIE and MINIPCIE.

COM & CAN scheme:

The COM port adopts ZT3243LEEA as a UART level conversion chip to support an RS232 mode, the CAN port uses an F81251S transceiver chip, and COM and CAN CAN be switched through a jumper cap.

GPIO & TF CARD scheme:

The 8-path GPIO and TF card seat can be switched through serial resistance.

SATA & SPI false scheme:

A 4-way SATA 7pin interface, wherein SATA1 and m.2ssd are compatible; the SPI interface provides 1 BIOS base, conveniently changes the BIOS chip to and provide SPI contact pin.

Functional jumper cap setting:

V12/VDC switch port: switchable 12VDC power and ATX 12V power; 5VSB disconnect port: the 5VSB power supply connection of the expansion board and the core board can be disconnected; PWROK ports: can provide PWROK signals for the core board, and is convenient for testing.

Signal indicator lamp:

Includes power indication lamps of 3.3V and 5V, and signal indication lamps of SLP_S3#, RSMRST#, etc.

In summary, the expansion board provided by the embodiment of the utility model has 8 USB ports, three independent displays, one pcie x4 slot and one pcie x16 slot, 4 SATA interfaces, and m.2 and MINIPCIE interfaces, thereby meeting the application demands of computers in most industries. In this embodiment, multiple interfaces are compatible, so that more functions can be realized on one expansion board, the integration level is higher, and the core board test scene and the custom requirement can be served. And moreover, the expansion board can be carried with a core board based on an Intel CPU, and has the advantages of strong processor performance, good stability, good compatibility compared with other COMe mainboards, stable performance, complete technical support and the like. And, the materials used for the expansion board have cost advantages, which in mass production applications make the expansion board cost advantageous. The design scheme can provide more functional interfaces and more stable operation conditions, and the layout and the wiring meet the standards of all protocols and can meet the test requirements of the high-performance core board. In addition, each function and power stability of the expansion board pass through tests of high temperature, low voltage, startup and shutdown and the like, so that the expansion board can be ensured to run stably in combination with most core boards. The COM-Express expansion board is easier to maintain and upgrade in view of its standardized interface and pluggable design. In market competition, this feature gives the COM-Express expansion board longer life cycle and higher reliability, and can provide more durable technical support for enterprises and developers.

The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.

Claims

1. A COM-Express based multi-function expansion board, comprising:

a COMe interface for connecting the core board;

2. A COM-Express based multifunctional expansion board according to claim 1, wherein the displayport module comprises: the device comprises a DP interface, an HDMI interface, a VGA interface, an eDP interface, an LVDS interface, a DP-HDMI conversion circuit and an HDMI direct connection circuit;

3. A COM-Express based multifunction expansion board according to claim 1, wherein the memory port module comprises: m.2, MINIPCIE and SATA interfaces; the M.2 interface is connected with the COMe interface;

4. A COM-Express based multifunction expansion board according to claim 1, wherein the audio port module comprises: an audio decoding chip connected with the COMe interface, and a microphone interface and an earphone interface connected with the audio decoding chip;

5. A COM-Express based multifunction expansion board according to claim 1, wherein the USB port module comprises: a plurality of USB3.0 interfaces and a plurality of USB2.0 interfaces connected to the COMe interface;

And/or the number of the groups of groups,

6. A COM-Express based multifunction expansion board according to claim 1, wherein the serial port module comprises: the device comprises a COM conversion unit, a CAN conversion unit, two COM interfaces, a CAN interface and an interface selection circuit;

7. A COM-Express based multifunction expansion board according to claim 1, further comprising: a power module;

8. The COM-Express based multifunction expansion board of claim 7, wherein the power module further comprises: a DC power supply circuit;

9. A COM-Express based multifunction expansion board according to claim 1, further comprising:

10. The COM-Express based multifunctional expansion board according to claim 1, wherein a chassis ground and a signal ground are provided in the COM-Express based multifunctional expansion board, the COM-Express based multifunctional expansion board further comprising: EMC protection module; the EMC protection module includes an isolation capacitance and an isolation resistance connected in parallel between the chassis ground and the signal ground.