CN207650795U - A kind of mainboard interface circuit - Google Patents

Abstract

The utility model is related to a kind of mainboard interface circuits, including mainboard, USB interface, HDMI interface, MXM interface modular converters and video card；The USB interface is connect with mainboard, and HDMI interface is connect with mainboard, and MXM interface modular converters are connected between mainboard and HDMI interface and mainboard；Video card is plugged on MXM interface modular converters；The IT651S chips that HDMI interface signal is converted to USB interface signal are connected between USB interface and mainboard；On mainboard, the HDMI interface is set as multiple；Each interface circuit can be connect with mainboard by this circuit so that the interface connected on video card originally can realize connection on mainboard；Since interface is set to without being set on video card on mainboard, the space of host is saved from space angle and interface marshalling on mainboard, it appears that more attractive；Multiple HDMI interface are set from point of view of practicability, mainboard, that is, is designed with multiple interfaces as output, can be supplied to more equipment accesses, practicability is high.

Description

A kind of mainboard interface circuit

Technical field

The utility model is related to field of circuit technology, more specifically to a kind of mainboard interface circuit.

Background technology

Display interface refers to the interface that the image output devices such as video card and display, television set are connect, but at present in circuit In design, interface is typically connected on video card, causes the spatial volume of video card excessive, while interface quantity is limited, can not be simultaneously Connect more output equipments.

Utility model content

The technical problem to be solved by the present invention is to for the drawbacks described above of the prior art, provide a kind of mainboard and connect Mouth circuit.

The utility model first aspect provides a kind of mainboard interface circuit, including mainboard, USB interface, HDMI interface, MXM Interface modular converter and video card；The USB interface is connect with the mainboard, and the HDMI interface is connect with the mainboard, described MXM interface modular converters are connected between the mainboard and the HDMI interface and the mainboard；The video card is plugged in described On MXM interface modular converters；It is connected between the USB interface and the mainboard and HDMI interface signal is converted into USB interface The IT651S chips of signal；On the mainboard, the HDMI interface is set as multiple.

Preferably, the HDMI interface include control chip, HDMI output interface, crystal oscillator, the first capacitance, the second capacitance, Third capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th capacitance, the 8th capacitance, first resistor, second resistance, first Electrostatic protector and the second electrostatic protector；The REXT pins of the control chip connect described first resistor one end, and described the The one resistance other end is grounded；The RESETB pins of the control chip connect described second resistance one end, and the second resistance is another One end connects first capacitance one end, the first capacitance other end ground connection；The XTL1 pins of the control chip connect institute Second capacitance one end and one end of the crystal oscillator are stated, the XTL0 pins of the control chip connect the third capacitance other end And the other end of the crystal oscillator；The control HDMICKN pins of chip, HDMICKP pins, HDMIDON pins, HDMID0P pins and the first pin, the 4th pin of second pin and the 5th pin of first electrostatic protector correspond Connection；HDMID1N pins, HDMID1P pins, HDMID2N pins, HDMID2P pins and the control of the control chip The first pin, second pin, the 4th pin and the 5th pin of device and second electrostatic protector connect one to one；Institute State the 6th pin of the first electrostatic protector, the 7th pin, the 9th pin, the tenth pin respectively with first electrostatic protector DO+ pins, D0- pins, CLK+CLK pins and the CLK- pins connect one to one；Second electrostatic protector 6th pin, the 7th pin, the 9th pin, the D2+ pins of the 9th pin and the HDMI interface, D2- pins, D1+ pins with And D1- pins connect one to one；The GND pin of the HDMI interface is grounded, and+5V the pins of the HDMI interface connect power supply VCC；The DDC_SCL pins of SCL pins, SDA pins and the HPD pins of HDMI interface and control chip, DDC_SDA pins with And HDMI_HPD pins connect one to one；The VDD33 pins for controlling chip connect the 4th capacitance one end and the 5th capacitance one End and the 6th capacitance one end and the 7th capacitance one end and the 8th capacitance one end；The 4th capacitance other end and the 5th capacitance It is connected between the other end and the 6th capacitance other end and the 7th capacitance other end and the 8th capacitance other end；Control core Remaining pin and the mainboard of piece connect one to one.

Preferably, including DDR4 memories, DDR4 memories are connect with the mainboard.

The utility model advantageous effect is：When work, by MXM interface modular converters by signal between mainboard and video card It on conversion to PD interfaces and exports, while DP signals can be converted to USB interface signal by IT651S and be connect by VGA by mainboard Mouth output；Each interface circuit can be connect with mainboard by this circuit so that the interface connected on video card originally can be in master Connection is realized on plate；Since interface is set to without being set on video card on mainboard, host is saved from space angle Space and the interface marshalling on mainboard, it appears that more attractive；Multiple HDMI are arranged from point of view of practicability, mainboard to connect Mouthful, that is, multiple interfaces are designed with as output, can be supplied to more equipment accesses, practicability is high.

Description of the drawings

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below in conjunction with attached drawing and reality Applying example, the utility model is described in further detail, and the accompanying drawings in the following description is only the section Example of the present invention, for this For the those of ordinary skill of field, without creative efforts, it is attached to can also be obtained according to these attached drawings other Figure：

Fig. 1 is the functional block diagram of the mainboard interface circuit of the utility model preferred embodiment；

Fig. 2 is the circuit diagram of the HDMI interface of the mainboard interface circuit of the utility model preferred embodiment.

Specific implementation mode

In order to keep the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with this practicality Technical solution in new embodiment carries out clear, complete description, it is clear that described embodiment is the portion of the utility model Point embodiment, rather than whole embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art are not paying creation Property labour under the premise of the every other embodiment that is obtained, belong to the scope of protection of the utility model.

A kind of mainboard interface circuit of the utility model preferred embodiment as shown in Figure 1, a kind of mainboard interface circuit, including Mainboard 1, USB interface 2, HDMI interface 3, MXM interface modular converters 4 and video card (not shown)；USB interface 2 connects with mainboard 1 It connects, HDMI interface 3 is connect with mainboard 1, and MXM interface modular converters 4 are connected between mainboard 1 and HDMI interface 3 and mainboard 1；It is aobvious Card insertion is connected on MXM interface modular converters 4；It is connected between USB interface 2 and mainboard 1 and HDMI interface signal is converted into VGA connects The IT651S chips 5 of message number；On mainboard 1, HDMI interface 3 is set as multiple；Model LGA1151, the MSM interface of mainboard Conversion module 4 uses SLOTA interface conversions；The mainboard is supported to connect multiple interface circuits；When work, lead between mainboard and video card It crosses MXM interface modular converters to convert signal on PD interfaces and exporting, while mainboard can be converted DP signals by IT651S It is exported for USB interface signal and by USB interface；Each interface circuit can be connect with mainboard by this circuit so that originally The interface connected on video card can realize connection on mainboard；Since interface is set to without being set on video card on mainboard, from The space for saving host is seen on space angle and interface marshalling on mainboard, it appears that more attractive；From point of view of practicability It sets out, multiple HDMI interface is set on mainboard, that is, be designed with multiple interfaces as output, can be supplied to more equipment accesses, it is practical Property it is high.

The mainboard interface circuit of the utility model preferred embodiment is as depicted in figs. 1 and 2, and HDMI interface 3 includes control core Piece 31, HDMI output interface 32, crystal oscillator U1, the first capacitance C1, the second capacitance C2, third capacitance C3, the 4th capacitance C4, the 5th electricity Hold C5, the 6th capacitance C6, the 7th capacitance C7, the 8th capacitance C8, first resistor R1, second resistance R2, the first electrostatic protector U2 With the second electrostatic protector U3；The model PS176 of the control chip 31；

Control one end REXT pins connection first resistor R1 of chip 31, first resistor R1 other ends ground connection；Control chip 31 one end RESETB pins connection second resistance R2, the second resistance R2 other ends connect first one end capacitance C1, the first capacitance The C1 other ends are grounded；The XTL1 pins for controlling chip 31 connect second one end capacitance C2 and one end of crystal oscillator U1, control chip The 31 XTL0 pins connection third capacitance C3 other ends and the other end of crystal oscillator U1；The HDMICKN pins of control chip 31, The first pin, the second pin the 4th of HDMICKP pins, HDMIDON pins, HDMID0P pins and the first electrostatic protector U2 Pin and the 5th pin connect one to one；Control the HDMID1N pins of chip 31, HDMID1P pins, HDMID2N pins, The first pin of HDMID2P pins and the second electrostatic protector U3, second pin, the 4th pin and the 5th pin correspond Connection；The 6th pin of first electrostatic protector U2, the 7th pin, the 9th pin, the tenth pin respectively with the first electrostatic protection DO+ pins, D0- pins, CLK+CLK pins and the CLK- pins of device connect one to one；The 6th of second electrostatic protector U3 Pin, the 7th pin, the 9th pin, the D2+ pins of the 9th pin and HDMI output interface 32, D2- pins, D1+ pins and D1- pins connect one to one；The GND pin of HDMI output interface 32 is grounded ,+5V pins connection the electricity of HDMI output interface 32 Source VCC；The DDC_SCL pins of SCL pins, SDA pins and the HPD pins of HDMI output interface 32 and control chip 31, DDC_SDA pins and HDMI_HPD pins connect one to one；The VDD33 pins for controlling chip 31 connect the 4th capacitance C4 mono- End and the 5th one end capacitance C5 and the 6th one end capacitance C6 and the 7th one end capacitance C7 and the 8th one end capacitance C8；The The four capacitance C4 other ends and the 5th capacitance C5 other ends and the 6th capacitance C6 other ends and the 7th capacitance C7 other ends with And the 8th connect between the capacitance C8 other ends；Remaining pin of control chip 31 connects one to one with mainboard 1；Video card Input is output to by mainboard 1 in control chip 31, and control chip 31 is passed through by connecting one to one with HDMI output interface 32 HDMI output interface 32 exports HMDI signals；Increase by the first electrostatic protector between HDMI output interface 32 and control chip 31 U2 and the second electrostatic protector U3 can remove electrostatic in signal, go to destatic the interference to signal；Control the pin of chip VDD33 Multiple capacitances of connection play a filtering role for circuit, can make chip steady operation in the state that one stable.

The mainboard interface circuit of the utility model preferred embodiment as shown in Figure 1, include DDR4 memories, DDR4 memories 7 with Mainboard connects；It connects DDR4 memories 7 and increases space for the processing of mainboard 1, stored for various circuit informations.

It should be understood that for those of ordinary skills, it can be modified or changed according to the above description, And all these modifications and variations belong to the protection domain of the appended claims for the utility model.

Claims (3)

1. a kind of mainboard interface circuit, including mainboard, USB interface, HDMI interface, MXM interface modular converters and video card；Its feature It is, the USB interface is connect with the mainboard, and the HDMI interface is connect with the mainboard, the MXM interface modular converters It is connected between the mainboard and the HDMI interface and the mainboard；The video card is plugged in the MXM interface modular converters On；The IT651S cores that HDMI interface signal is converted to USB interface signal are connected between the USB interface and the mainboard Piece；On the mainboard, the HDMI interface is set as multiple.

2. mainboard interface circuit according to claim 1, which is characterized in that the HDMI interface include control chip, HDMI output interface, crystal oscillator, the first capacitance, the second capacitance, third capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th Capacitance, the 8th capacitance, first resistor, second resistance, the first electrostatic protector and the second electrostatic protector；The control chip REXT pins connect described first resistor one end, the first resistor other end ground connection；The RESETB pins of the control chip Described second resistance one end is connected, the second resistance other end connects first capacitance one end, and first capacitance is another End ground connection；The XTL1 pins of the control chip connect second capacitance one end and one end of the crystal oscillator, the control The XTL0 pins of chip connect the other end of the third capacitance other end and the crystal oscillator；The control chip HDMICKN pins, HDMICKP pins, HDMIDON pins, HDMID0P pins draw with the first of first electrostatic protector Foot, the 4th pin of second pin and the 5th pin connect one to one；HDMID1N pins, the HDMID1P of the control chip Pin, HDMID2N pins, HDMID2P pins and the first pin of the control chip and second electrostatic protector, second Pin, the 4th pin and the 5th pin connect one to one；6th pin of first electrostatic protector, the 7th pin, 9th pin, the tenth pin respectively with the DO+ pins of first electrostatic protector, D0- pins, CLK+CLK pins and described CLK- pins connect one to one；The 6th pin, the 7th pin, the 9th pin, the 9th pin of second electrostatic protector It connects one to one with D2+ pins, D2- pins, D1+ pins and the D1- pins of the HDMI interface；The HDMI interface GND pin is grounded ,+5V pins connection power supply the VCC of the HDMI interface；SCL pins, SDA pins and the HPD of HDMI interface DDC_SCL pins, DDC_SDA pins and the HDMI_HPD pins of pin and control chip connect one to one；Control chip VDD33 pins connect the 4th capacitance one end and the 5th capacitance one end and the 6th capacitance one end and the 7th capacitance one end with And the 8th capacitance one end；The 4th capacitance other end and the 5th capacitance other end and the 6th capacitance other end and the 7th capacitance It is connected between the other end and the 8th capacitance other end；Remaining pin of control chip connects one to one with mainboard.

3. mainboard interface circuit according to claim 1, which is characterized in that including DDR4 memories, DDR4 memories with it is described Mainboard connects.