CN105373507A - USB port function extension apparatus and method - Google Patents
USB port function extension apparatus and method Download PDFInfo
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- CN105373507A CN105373507A CN201510619093.0A CN201510619093A CN105373507A CN 105373507 A CN105373507 A CN 105373507A CN 201510619093 A CN201510619093 A CN 201510619093A CN 105373507 A CN105373507 A CN 105373507A
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- circuit
- esd protection
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- high speed
- usb
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4086—Bus impedance matching, e.g. termination
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/40—Bus coupling
- G06F2213/4004—Universal serial bus hub with a plurality of upstream ports
Abstract
The invention relates to the technical field of serial bus communication and discloses a USB port function extension apparatus and method. The extension apparatus adopted by the method comprises a high-speed USB2.0 line concentration controller and an ESD protection circuit, wherein the input end of the high-speed USB2.0 line concentration controller is connected with signal cables of a group of USB2.0 interfaces through the ESD protection circuit; a plurality of data distribution end cables of the high-speed USB2.0 line concentration controller are connected with corresponding signal cables of multiple groups of USB2.0 interfaces through the ESD protection circuit respectively; and a plurality of control end cables of the high-speed USB2.0 line concentration controller are connected with the power end of the ESD protection circuit connected with a high-speed USB2.0 output port through a plurality of power distribution switches. The power end of each power distribution switch is connected with a 5V direct-current power cable. According to the USB port function extension apparatus and method, a group of USB2.0 can be extended into six groups under the condition of satisfying high quality and high rate of communication in combination with anti-static international certification standard requirements by utilizing a multi-task decoding technology and a state machine control principle, and the interfaces are provided for users to use.
Description
Technical field
The present invention relates to terminating machine universal serial bus communications technical field, particularly relate to a kind of expanding unit and method of terminating machine USB (universal serial bus) port function.
Background technology
Current universal serial bus technology is widely used in consumer electronics product, for daily life bring convenient, but exchange the arrival in epoch along with big data quantity, the quantity of the original USB (universal serial bus) of consumer electronics product is obviously not enough.
For financial sector, need in the use procedure of banking terminal platform to access a large amount of peripheral hardware, as identity recognition terminal, Password Input terminal, finger print collecting terminal, entry card is stamped the card device terminal, scanner terminal, typewriter terminal, wireless router terminal etc., these peripheral hardwares all use USB (universal serial bus) to connect.But banking terminal platform USB (universal serial bus) resource is but limited, the port pulling out certain root communications cable must be there is in the use of platform, and accessing another root communications cable port for it, this will affect the service efficiency of platform, brings inconvenience to the staff of operating platform.
Summary of the invention
In order to overcome the deficiency in background technology, the invention provides a kind of expanding unit and method of terminating machine USB (universal serial bus) port function.
In order to realize foregoing invention object, the present invention adopts following technical scheme:
A kind of USB (universal serial bus) port function expanding device, comprise: high speed USB 2.0 line concentration controller 1, esd protection circuit 2, the input end of described high speed USB 2.0 line concentration controller 1 is connected by the signal cable of esd protection circuit 2 with one group of USB2.0 interface of electrical connection universal serial bus, 3. some data distribution end cables of high speed USB 2.0 line concentration controller 1 are connected with the signal cable of some groups of corresponding USB2.0 interfaces respectively by esd protection circuit 2, 2. some control end cables of described high speed USB 2.0 line concentration controller are connected with corresponding power distribution switch 3 input end, 1. the power end of power distribution switch 3 is connected with 5V direct supply cable, 4. some output terminals of power distribution switch 3 are connected with the power end being connected the esd protection circuit 2 exporting high speed USB 2.0 port respectively by power cable.
A kind of USB (universal serial bus) port function expanding device, 6. described high speed USB 2.0 line concentration controller, be 5. made up of with filtering circuit FE2.1 integrated circuit U1, clock source circuit,
Described clock source circuit 5. by frequency be 12MHz quartz-crystal resonator Y1 with and connect the ceramic condenser C3 of 8pF and electric capacity C4 and form, quartz crystal oscillator two ends are respectively to power supply ground;
6. described filtering circuit comprises: power filter networking, input signal clutter filtering circuit, and the power filter networking that power filter networking constitutes 3.3V direct supply and 1.8V direct supply respectively by electrochemical capacitor E3 and E4 forms; Input signal clutter filtering circuit is made up of resistance R4 and electric capacity C15.
A kind of USB (universal serial bus) port function expanding device, described esd protection circuit is made up of integration module PRTR5V0U2X and peripheral circuit, peripheral circuit by uncoupling circuit 7. a, filtering circuit 7. b form, 4 pin and the filtering circuit 7. b phase downlink connection power supply of described PRTR5V0U2X integrated circuit, 2 pin of integrated circuit D11 and 3 pin access high-speed data or radio-frequency signal line respectively, and the described filtering circuit 7. b other end is connected ground connection with 1 pin of integrated circuit D11;
Described filtering circuit 7. b is the filtering circuit composed in parallel by electrochemical capacitor E12 and ceramic condenser C13; For the garbage signal filtering by input pole, thus reduce the impact on late-class circuit;
Described integrated circuit PRTR5V0U2X is a ultralow capacitance track to track electro-static discharge protection diodes.
A kind of USB (universal serial bus) port function expanding device, described power distribution switch 3 is made up of integrated circuit U4 and its peripheral circuit, described integrated circuit U4 is high edge type quick MOSFET dual channel source dispense switch, and often organize single channel and all support continuous current 500mA, model is MIC2026;
9. 8. the peripheral circuit of described MIC2026 integrated circuit be made up of with order wire impedance matching circuit filtering circuit,
8. described filtering circuit is made up of electrochemical capacitor E11 and ceramic condenser C12, for the garbage signal in filtering 5V direct supply, ensures MIC2026 reliably working;
9. described communications cable impedance matching circuit is made up of resistance R7, and it is attempted by between power supply and data line, when data line is high level, draws electric current for it provides, and ensures that data line high level is reliably effective.
One group of USB2.0 bus extension is six groups of high speed USB 2.0 buses by an extended method for USB (universal serial bus) port function expanding device, is supplied to Principle of External Device Extension and uses; Its step is as follows:
1) first by one group of cable, USB2.0 signal is accessed seven port USB2.0 line concentration controllers at a high speed;
2) by the high speed control end of seven port USB2.0 line concentration controllers (1) and the power distribution circuit of power distribution switch (3) construction system, for six groups of USB2.0 signal cables provide power supply;
3) between one group of USB2.0 signal cable and high speed seven port USB2.0 line concentration controller input ends of input, a set of static discharge unit esd protection circuit (2) is increased, a set of static discharge unit esd protection circuit (2) is all increased between seven port USB2.0 line concentration controller output terminals, for the protection of the impact from static discharge and other transient electrical signal of two high-speed datas in USB2.0 or radio-frequency signal on the six groups of USB2.0 signal cables exported and at a high speed;
4) during expansion,
A. universal serial bus electric data can be transferred to high speed USB 2.0 line concentration controller 1 by esd protection circuit 2 by one group of serial bus interface USB2.0;
B. high speed USB 2.0 line concentration controller carries out decoding to input signal under the support of various task decoding technique, and 3. data are assigned to the control end of the esd protection integrated circuit of six groups of each outputs by utilization state machine control technology by the cable of several the second control end itself;
C. simultaneously, 2. high speed USB 2.0 line concentration controller controls the action of corresponding power distribution switch 3 by the cable of several the first control end itself;
D. connect direct supply power distribution switch 3 action 1., providing two-way direct supply, is the esd protection integrated circuit that the passage of correspondence is installed, and meets 4. USB2.0 agreement self-powered provides 5V direct supply requirement by cable;
E. when the action of each power distribution switch 3, power distribution switch 3 is the esd protection integrated circuit that respective channel is installed, and 4. provides 5V direct supply by cable;
F. same, power distribution switch 3 is the esd protection integrated circuit that six groups of passages of correspondence are installed, and 4. provides 5V direct supply, and export the data of six groups of high speed USB 2.0 ports by cable;
When the data line at esd protection circuit 2 pin place, when having the electric signal higher than supply voltage, energy to be released to power supply by D1 by signal;
When the data line at esd protection circuit 2 pin place, when having the electric signal lower than reference point ground voltage, energy to be released to reference point ground voltage by D2 by signal; Even if 4 pin non-transformers of esd protection circuit are powered;
When the data line at esd protection circuit 2 pin place, have higher than D1 pipe conduction voltage drop, when+ZD punctures forward voltage signal, also energy can be released by reference to point; So just make connected high-speed data or radio-frequency signal line, no matter be under equipment has power supply or power free situation, all can play the effect of electrostatic discharge protection ESD.
Owing to adopting technical scheme described above, the present invention has following superiority:
The invention solves the problem of universal serial bus port quantity not sufficient, expand to six groups of USB (universal serial bus) by one group of USB (universal serial bus) port, for daily life bring convenient.For financial sector, need to access a large amount of peripheral hardware in the use procedure of banking terminal platform and all can access in described USB (universal serial bus) port Function Extension equipment.Ensure USB (universal serial bus) port communication quality and traffic rate, improve USB (universal serial bus) self-powered ability.Staff for operating platform provides conveniently.
Accompanying drawing explanation
Fig. 1 is a kind of USB (universal serial bus) port extended method structured flowchart;
Fig. 2 is high speed USB 2.0 polar curve controller and peripheral circuit circuit diagram thereof;
Fig. 3 is esd protection circuit and power distribution switch and peripheral circuit circuit diagram thereof;
Fig. 4 is PRTR5V0U2X inner structure schematic diagram.
Embodiment
As shown in Figures 1 to 4, a kind of USB (universal serial bus) port function expanding device, comprise: high speed USB 2.0 line concentration controller 1, esd protection circuit 2, , the input end of described high speed USB 2.0 line concentration controller 1 is connected by the signal cable of esd protection circuit 2 with one group of USB2.0 interface of electrical connection universal serial bus, 3. some data distribution end cables of high speed USB 2.0 line concentration controller 1 are connected with the signal cable of some groups of corresponding USB2.0 interfaces respectively by esd protection circuit 2, 2. some control end cables of described high speed USB 2.0 line concentration controller are connected with corresponding power distribution switch 3 input end, 1. the power end of power distribution switch 3 is connected with 5V direct supply cable, 4. some output terminals of power distribution switch 3 are connected with the power end being connected the esd protection circuit 2 exporting high speed USB 2.0 port respectively by power cable.Namely by one group of USB2.0 interface, USB (universal serial bus) is connected electrically to high speed USB 2.0 line concentration controller, for meeting ESD international standard, connect by esd protection circuit in the USB2.0 signal input line cable, described high speed USB 2.0 line concentration controller carries out decoding to input signal under the support of various task decoding technique, data are assigned to by utilization state machine control technology has the channel data distribution end cable of demand 3. to go up in six groups of USB2.0 passages, high speed USB 2.0 line concentration controller simultaneously controls corresponding power distribution switch motion, for respective channel provides 5V direct supply, meet the self-powered requirement of USB2.0 agreement, same output six groups of high speed USB 2.0 ports, also increase and have esd protection integrated circuit.Data distribution end cable 3. by cable 3. a, cable 3. b, cable 3. c form.
Described high speed USB 2.0 polar curve controller, is made up of FE2.1 integrated circuit U1 and peripheral circuit thereof, supports multitask decoding, maximumly support the transmission of six groups of data, whole integrated circuit, according to state machine control principle, can reduce communication delay, ensures high-quality, two-forty, maximum frequency 480MHz.Described FE2.1 integrated chip uses 0.18um manufacturing process and comprehensive power/Clock management mechanism, can reduce whole circuit power consumption to greatest extent.
The peripheral circuit of described FE2.1 integrated circuit, comprise clock source circuit 5. with filtering circuit 6., 5. described clock source circuit is that 12MHz quartz-crystal resonator Y1, ceramic condenser C3 and C4 form by frequency, quartz-crystal resonator Y1 two ends respectively to power supply ground, and connect ceramic condenser C3 and C4 of 8pF;
Described filtering circuit is that the resistance-capacitance network be 6. made up of electric capacity and resistance enough becomes, wherein the power filter networking 6. c of electrochemical capacitor E3 and E4 power filter networking 6. a and the 1.8V direct supply that constitutes 3.3V direct supply respectively; R4 and C15 constitutes the clutter filtering circuit 6. b of input signal.
Described esd protection circuit is made up of integration module PRTR5V0U2X and peripheral circuit thereof; described integrated circuit D9; D10; D11 model is PRTR5V0U2X is a ultralow capacitance track to track electro-static discharge protection diodes; two high-speed datas or radio-frequency signal line can be protected from the impact of static discharge with other transient signal; inner form the diode of ultralow capacitance and an extra Transient Suppression Diode by two, this device can guarantee the characteristic that also can realize HW High Way protection when not having power supply supply.
Electrostatic discharge protection esd protection circuit PRTR5V0U2X as shown above 4 pin connects power supply, 1 pin ground connection, 2 pin and 3 pin access high-speed data or radio-frequency signal line respectively, for 2 pin: 2 pin 3 pin functions are identical, when the data line at 2 pin places, when having the electric signal higher than supply voltage, energy can be released to power supply by D1 by signal; When the data line at 2 pin places, when having the electric signal lower than reference point ground voltage, energy can be released to reference point ground voltage by D2 by signal.Even if 4 pin of PRTR5V0U2X do not have Power supply, when the data line at 2 pin places, have when puncturing forward voltage signal higher than D1 pipe conduction voltage drop+ZD, also energy can be released by reference to point.So just make connected high-speed data or radio-frequency signal line, no matter be under equipment has power supply or power free situation, all can play the effect of electrostatic discharge protection ESD.
The peripheral circuit of described PRTR5V0U2X integrated circuit, by uncoupling circuit 7. a and filtering circuit 7. b, as shown in Figure 3, described filtering circuit is the circuit network that is made up of electrochemical capacitor E12 and ceramic condenser C13 of b 7., by the garbage signal filtering of input pole, thus reduce the impact on late-class circuit.
Described power distribution switch is made up of integrated circuit MIC2026 and its peripheral circuit; described integrated circuit U4 model MIC2026 is a dual channel source dispense switch; use switch mosfet pipe as switching device; have the characteristic of low on-resistance and response fast; and provide short-circuit protection, overheating protection, overload protection and soft start function; often organize single channel and all can support maximum continuous current 500mA, USB2.0 communication standard on/off ability can be met.Described switch mosfet pipe is the quick MOSFET of high edge type.
The peripheral circuit of described MIC2026 integrated circuit, 8. be 9. made up of with order wire impedance matching circuit filtering circuit, as shown in Figure 3, the circuit network that 8. described filtering circuit is made up of electrochemical capacitor E11 and ceramic condenser C12, garbage signal in filtering 5V direct supply, ensures MIC2026 reliably working.9. described communications cable impedance matching circuit is made up of resistance R7, and it is attempted by between power supply and data line, when data line is high level, draws electric current for it provides, and ensures that data line high level is reliably effective.
Described electrical connection uses the two-sided glass-fiber-plate manufacturing process of printed circuit board (PCB) list, being linked together by multiple integrated circuit, while meeting basic electrical specification, taking into account electromagnetic compatibility by covering copper conductor, and assurance function is stablized.
Claims (5)
1. a USB (universal serial bus) port function expanding device, it is characterized in that: comprising: high speed USB 2.0 line concentration controller 1, esd protection circuit 2, the input end of described high speed USB 2.0 line concentration controller 1 is connected by the signal cable of esd protection circuit 2 with one group of USB2.0 interface of electrical connection universal serial bus, 3. some data distribution end cables of high speed USB 2.0 line concentration controller 1 are connected with the signal cable of some groups of corresponding USB2.0 interfaces respectively by esd protection circuit 2, 2. some control end cables of described high speed USB 2.0 line concentration controller are connected with corresponding power distribution switch 3 input end, 1. the power end of power distribution switch 3 is connected with 5V direct supply cable, 4. some output terminals of power distribution switch 3 are connected with the power end being connected the esd protection circuit 2 exporting high speed USB 2.0 port respectively by power cable.
2. a kind of USB (universal serial bus) port function expanding device according to claim 1, it is characterized in that: described high speed USB 2.0 line concentration controller, 5. be 6. made up of with filtering circuit FE2.1 integrated circuit U1, clock source circuit, described clock source circuit 5. by frequency be 12MHz quartz-crystal resonator Y1 with and connect the ceramic condenser C3 of 8pF and electric capacity C4 and form, quartz crystal oscillator two ends are respectively to power supply ground;
6. described filtering circuit comprises: power filter networking, input signal clutter filtering circuit, and the power filter networking that power filter networking constitutes 3.3V direct supply and 1.8V direct supply respectively by electrochemical capacitor E3 and E4 forms; Input signal clutter filtering circuit is made up of resistance R4 and electric capacity C15.
3. a kind of USB (universal serial bus) port function expanding device according to claim 1, it is characterized in that: described esd protection circuit is made up of integration module PRTR5V0U2X and peripheral circuit, peripheral circuit by uncoupling circuit 7. a, filtering circuit 7. b form, 4 pin and the filtering circuit 7. b phase downlink connection power supply of described PRTR5V0U2X integrated circuit, 2 pin of integrated circuit D11 and 3 pin access high-speed data or radio-frequency signal line respectively, and the described filtering circuit 7. b other end is connected ground connection with 1 pin of integrated circuit D11;
Described filtering circuit 7. b is the filtering circuit composed in parallel by electrochemical capacitor E12 and ceramic condenser C13; For the garbage signal filtering by input pole, thus reduce the impact on late-class circuit;
Described integrated circuit PRTR5V0U2X is a ultralow capacitance track to track electro-static discharge protection diodes.
4. a kind of USB (universal serial bus) port function expanding device according to claim 1, it is characterized in that: described power distribution switch 3 is made up of integrated circuit U4 and its peripheral circuit, described integrated circuit U4 is high edge type quick MOSFET dual channel source dispense switch, often organize single channel and all support continuous current 500mA, model is MIC2026;
9. 8. the peripheral circuit of described MIC2026 integrated circuit be made up of with order wire impedance matching circuit filtering circuit, 8. described filtering circuit is made up of electrochemical capacitor E11 and ceramic condenser C12, for the garbage signal in filtering 5V direct supply, ensure MIC2026 reliably working;
9. described communications cable impedance matching circuit is made up of resistance R7, and it is attempted by between power supply and data line, when data line is high level, draws electric current for it provides, and ensures that data line high level is reliably effective.
5. the extended method of a kind of USB (universal serial bus) port function expanding device as claimed in claim 1, is characterized in that: be six groups of high speed USB 2.0 buses by one group of USB2.0 bus extension, is supplied to Principle of External Device Extension and uses; Its step is as follows:
1) first by one group of cable, USB2.0 signal is accessed seven port USB2.0 line concentration controllers at a high speed;
2) by the high speed control end of seven port USB2.0 line concentration controllers (1) and the power distribution circuit of power distribution switch (3) construction system, for six groups of USB2.0 signal cables provide power supply;
3) between one group of USB2.0 signal cable and high speed seven port USB2.0 line concentration controller input ends of input, a set of static discharge unit esd protection circuit (2) is increased, a set of static discharge unit esd protection circuit (2) is all increased between seven port USB2.0 line concentration controller output terminals, for the protection of the impact from static discharge and other transient electrical signal of two high-speed datas in USB2.0 or radio-frequency signal on the six groups of USB2.0 signal cables exported and at a high speed;
4) during expansion,
A. universal serial bus electric data can be transferred to high speed USB 2.0 line concentration controller 1 by esd protection circuit 2 by one group of serial bus interface USB2.0;
B. high speed USB 2.0 line concentration controller carries out decoding to input signal under the support of various task decoding technique, and 3. data are assigned to the control end of the esd protection integrated circuit of six groups of each outputs by utilization state machine control technology by the cable of several the second control end itself;
C. simultaneously, 2. high speed USB 2.0 line concentration controller controls the action of corresponding power distribution switch 3 by the cable of several the first control end itself;
D. connect direct supply power distribution switch 3 action 1., providing two-way direct supply, is the esd protection integrated circuit that the passage of correspondence is installed, and meets 4. USB2.0 agreement self-powered provides 5V direct supply requirement by cable;
E. when the action of each power distribution switch 3, power distribution switch 3 is the esd protection integrated circuit that respective channel is installed, and 4. provides 5V direct supply by cable;
F. same, power distribution switch 3 is the esd protection integrated circuit that six groups of passages of correspondence are installed, and 4. provides 5V direct supply, and export the data of six groups of high speed USB 2.0 ports by cable;
When the data line at esd protection circuit 2 pin place, when having the electric signal higher than supply voltage, energy to be released to power supply by D1 by signal;
When the data line at esd protection circuit 2 pin place, when having the electric signal lower than reference point ground voltage, energy to be released to reference point ground voltage by D2 by signal; Even if 4 pin non-transformers of esd protection circuit are powered;
When the data line at esd protection circuit 2 pin place, have higher than D1 pipe conduction voltage drop, when+ZD punctures forward voltage signal, also energy can be released by reference to point; So just make connected high-speed data or radio-frequency signal line, no matter be under equipment has power supply or power free situation, all can play the effect of electrostatic discharge protection ESD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510619093.0A CN105373507A (en) | 2015-09-25 | 2015-09-25 | USB port function extension apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510619093.0A CN105373507A (en) | 2015-09-25 | 2015-09-25 | USB port function extension apparatus and method |
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| CN105373507A true CN105373507A (en) | 2016-03-02 |
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| CN201510619093.0A Pending CN105373507A (en) | 2015-09-25 | 2015-09-25 | USB port function extension apparatus and method |
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| CN109753472A (en) * | 2018-12-11 | 2019-05-14 | 航天信息股份有限公司 | data processing method and device |
| CN110262993A (en) * | 2019-06-11 | 2019-09-20 | 浙江华创视讯科技有限公司 | Input the read method and circuit, storage medium, electronic device of information |
| CN115061964A (en) * | 2022-06-30 | 2022-09-16 | 东风汽车集团股份有限公司 | Low-cost low-static-power-consumption input expansion circuit and expansion method |
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Application publication date: 20160302 |
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