CN1180354C - USB control circuit capable of switching path automatically - Google Patents

USB control circuit capable of switching path automatically Download PDF

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Publication number
CN1180354C
CN1180354C CNB021028745A CN02102874A CN1180354C CN 1180354 C CN1180354 C CN 1180354C CN B021028745 A CNB021028745 A CN B021028745A CN 02102874 A CN02102874 A CN 02102874A CN 1180354 C CN1180354 C CN 1180354C
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China
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usb
high speed
transceiver
controller
path
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Expired - Lifetime
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CN1362676A (en
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江晋毅
赖清苍
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Via Technologies Inc
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Via Technologies Inc
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Abstract

The present invention relates to a USB control circuit, particularly to a USB control circuit of switching paths automatically. The present invention is characterized in that the USB control circuit comprises a plurality of USB joints for connecting various USB devices; each USB joint is connected with a USB transceiver connected with a USB controller; the USB controller drives and controls the USB devices connected with the USB joints; each USB transceiver is connected with a path controller; in addition, at least one high-speed USB transceiver connected with a high-speed USB controller is arranged, and is connected with each USB joint by a switching device; each high-speed USB transceiver is connected with the path controller; each path controller is connected with the path controller of a high-speed device; the path controller of the high-speed device is matched with each path controller for automatically switching control paths of the USB joints connected with the high-speed USB devices to the high-speed USB transceiver for driving the control paths by the high-speed USB controller.

Description

But the USB control circuit of switching path automatically
Technical field
The present invention relates to a kind of USB control circuit, but a kind of USB control circuit of switching path automatically particularly.
Background technology
In recent years, because the high development of information related industry and people increase day by day to the requirement of information product computing and transmission speed, make the bus-bar technology of USB1.1 (Universal SerialBus) specification that the dealer commonly used in the past apply use, under the continuous excelsior research and development improvement of dealer, there is the new spec that can improve transfer rate in a large number to emerge finally.
Because the USB specification has plug and play (Plug.And-Play; PNP), 127 the USB devices of can contacting at most can provide the electric power of 5V, and only need take an advantage such as IRQ, and be subjected to liking of numerous users.The transfer rate of employed in the past USB1.1 specification comprises the 1.5Mbps of low speed (Lowspeed) and two kinds of speed of 12Mbps of full speed (Full speed), for general device at a slow speed such as keyboard, slide-mouse, and audio device etc. enough uses, yet then still dislike not enough for devices such as the accesses of handling picture, video signal and data, so transfer rate is promptly received ardent echoing up to high speed USB (USB2.0) specification of 480Mbps once releasing.
Yet, still there are at present periphery outfit and traditional input-output device at a slow speed of many computers still need use the USB1.1 specification, the solution that the part dealer takes is as shown in Figure 1, can connect four USB Design of device, it is mainly constructed is to include one the one USB joint (pad) 121 to connect one the one USB port 141, one the 2nd USB joint 123 connects one the 2nd USB port 143, one the 3rd USB joint 125 connects one the 3rd USB port 145 and one the 4th USB joint 127 connects one the 4th USB port 147, one high speed USB controller (Enhanced Host Controller) 13, one the one USB controller (Universal Host Controller), 15 and 1 the 2nd USB controller 17.Wherein respectively be provided with a high speed USB transceiver (Transceiver) 16, a USB transceiver 18 and a port path controller (Prot Routing Logic) 19 in each USB port.
Be connected to each USB joint and can do the transmission of data and the action of control by high speed USB transceiver 16 and USB transceiver 18, and high speed USB transceiver 16 and USB transceiver 18 are connected to one of them of high speed USB controller 13 or a USB controller 15 and the 2nd USB controller 17 respectively by port path controller 19 on the other hand the USB device that is connected in the USB joint.So can judge whether the USB device that this USB joint is connected is the high speed USB device by a high speed USB device detection process (chirp sequence), and the control of this USB joint is switched to USB controller or high speed USB controller by this port path controller 19, with the due transfer efficiency of performance device.
Because in USB1.1UHCI (Universal Host Controller Interface) specification, one controller can only be controlled two USB ports, and another interface specification OHCI (open Host ControllerInterface) is though unrestricted, but at most only accomplish to control three USB ports on the practice, so two USB controllers need be arranged, the high speed USB controller is a plurality of USB of may command port then.
Though above-mentioned structure can reach the effect in the control path of automaticallying switch, allow the user avoid the wrong puzzlement of pegging graft, but necessary each joint arrangement one high speed USB transceiver, because it takies a high speed USB transceiver and a USB transceiver area of chip ratio and is about 10: 1, and have six USB joints in the present design generally, each joint arrangement one high speed USB transceiver will make chip area significantly increase, and not only against compact principle of design of modern times, production cost significantly be increased.Again, generally speaking computer two high speed USB devices of pegging graft have simultaneously belonged to quite high utilization factor, and peg graft the simultaneously chance of all USB joints of speeder is few especially, cause the very considerable wasting of resources so above-mentioned design is real.
In order to reduce the wasting of resources, the quantity that can design the high speed USB transceiver is less than the quantity of USB joint, but this mode will limit the high speed USB device and only can use at specific USB joint, if the user can't differentiate each USB joint and whether be connected to the high speed USB transceiver, and mistake is connected to the joint that does not connect the high speed USB transceiver with the high speed USB device, will make this high speed USB device can't bring into play its due usefulness.
Therefore, how at the above-mentioned shortcoming of commonly using control circuit, and the problem that is taken place when using proposes a kind of novel solution, but design a kind of structure of efficent use of resources, not only can automatically switch its control path avoid the mistake of pegging graft, and can significantly reduce production costs, be not to use for a long time the person eagerly to look forward to and difficulty place that human desires row of the present invention solves always, and the inventor is based on the correlative study of engaging in IT industry for many years, exploitation, and the practical experience of selling, it is the idea of thinking and improveing, through design in many ways, inquire into, after studying sample and improvement, but work out a kind of USB control circuit of switching path automatically finally, to solve the above problems.
Summary of the invention
Technical matters to be solved by this invention is, but at the above-mentioned deficiency of prior art and a kind of USB control circuit of switching path automatically is provided.
Above-mentioned technical matters of the present invention is realized by following technical scheme.
But a kind of USB control circuit of switching path automatically is characterized in that including:
A plurality of USB joints can be in order to connect various USB device;
A plurality of USB transceivers are connected to each corresponding USB joint;
The USB device that is connected in corresponding USB joint be controlled and be driven at least one USB controller with corresponding USB transceiver connection, can by each USB transceiver respectively;
A plurality of ports path controller, with corresponding USB transceiver connects respectively;
At least one high speed USB transceiver, each is connected with each USB joint and port path controller;
One high speed USB controller connects each high speed USB transceiver, can control and drive the high speed USB device that is connected in the USB joint by each high speed USB transceiver; And
One speeder path controller, connect each port path controller, can be by the cooperation of this speeder path controller and each port path controller automatically a control path that connects the USB joint of high speed USB device be switched to the high speed USB transceiver and by high speed USB controller controlling and driving.
Except that above-mentioned essential features, in specific implementation process, also can replenish following technology contents:
Wherein the junction of this high speed USB transceiver and each USB joint still is provided with a switching device shifter.
Wherein this switching device shifter is by speeder path controller control, and it may be selected to be and the conducting of arbitrary high speed USB transceiver and wherein a kind of state of opening circuit.
Wherein this switching device shifter includes at least one gauge tap, and connects corresponding high speed USB transceiver with each gauge tap.
Wherein each gauge tap is to be connected to speeder path system device, is controlled its conducting and is opened circuit by the speeder path controller.
Wherein the quantity of this high speed USB transceiver is less than the quantity of USB joint.
Wherein each port path controller is provided with a status displays.
Wherein this control circuit is to be combined in the South Bridge chip.
Above-mentioned technical matters of the present invention also can be realized by following another technical scheme.
But a kind of USB control circuit of switching path automatically is characterized in that including:
A plurality of USB joints are in order to connect various USB device;
A plurality of switching device shifters are connected to each corresponding USB joint;
A plurality of USB transceivers are connected with corresponding USB joint respectively;
At least one USB controller with corresponding USB transceiver connection, is controlled and drives the USB device that is connected in corresponding USB joint respectively by each USB transceiver;
At least one high speed USB transceiver, each is connected with each switching device shifter;
One high speed USB controller connects each high speed USB transceiver, controls and drive the high speed USB device that is connected in the USB joint by each high speed USB transceiver; And
One combinatorial path controller, connect each USB transceiver and each high speed USB transceiver, automatically a control path that connects the USB joint of high speed USB device is switched to the high speed USB transceiver by this combinatorial path controller and switching device shifter and by high speed USB controller controlling and driving.
In specific implementation process, the combinatorial path controller control in this programme still is provided with a plurality of status displayses.
The invention has the advantages that:
1, utilizes a speeder path controller and can be automatically the USB joint control path that is connected with the high speed USB device is switched to the high speed USB transceiver and control by the high speed USB controller drives.
2, the quantity of its high speed USB transceiver is less than the quantity of USB joint and can significantly reduces area of chip and reduce production costs.
3, its USB joint connects each high speed USB transceiver via a switching device shifter, can automatically switch by the control of combinatorial path controller to control the path.
4, its switching device shifter includes a plurality of gauge tap, is controlled its conducting and is opened circuit by speeder path controller or combinatorial path controller, can use the switching controls path.
Now for feature of the present invention, structure and the effect reached are had further understanding and understanding, careful assistant describes in detail as the back with preferred embodiment and conjunction with figs.:
Description of drawings
Fig. 1 is a block schematic diagram of commonly using the USB control circuit.
Fig. 2 is the circuit block diagram of a preferred embodiment of the present invention.
Fig. 3 is the block schematic diagram of the embodiment of the invention when action.And
Fig. 4 is the circuit block diagram of another embodiment of the present invention.
Embodiment
At first, seeing also Fig. 2, is the circuit block diagram of a preferred embodiment of the present invention.With four USB joints is example, and as shown in the figure, its USB joint 221 is connected with one first switching device shifter 227 and one the one USB transceiver 223, and a USB transceiver 223 is connected with one first a port path controller 225 and a USB controller 273 respectively; The 2nd USB joint 241 is connected with one second switching device shifter 247 and one the 2nd USB transceiver 243, and the 2nd USB transceiver 243 connects one second a port path controller 245 and a USB controller 273 respectively; The 3rd USB joint 261 is connected with one the 3rd switching device shifter 267 and one the 3rd USB transceiver 263, and the 3rd USB transceiver 263 connects one the 3rd port path controller 265 and the 2nd USB controller 275 respectively; The 4th USB joint 281 is connected with one the 4th switching device shifter 287 and one the 4th USB transceiver 283, and the 4th USB transceiver 283 connects one the 4th port path controller 285 and the 2nd USB controller 275 respectively; Other is provided with one first high speed USB transceiver 233 and one second high speed USB transceiver 253 is connected with each USB joint by each switching device shifter respectively, and each high speed USB transceiver also is connected to each a port path controller and a high speed USB controller 271 respectively; Be provided with a speeder path controller 29 again and connect each port path controller and each switching device shifter.
Under above-mentioned structure, arbitrary USB joint, when being connected with a USB device as the 3rd USB joint 261, at first can judge whether this USB device is full speed USB device by the 3rd USB transceiver 263, if not, then the 3rd port path controller 265 can directly will be controlled path setting for being connected to the 2nd USB controller 275 by 263 master controls of the 3rd USB transceiver; If preliminary this USB device of judgement is a full speed USB device, then Third Road footpath controller 265 can be cancelled the control of the 3rd USB transceiver earlier, speeder path controller 29 then can be according to the behaviour in service of each high speed USB transceiver, to control the path by the 3rd switching device shifter 267 and switch to still unappropriated high speed USB transceiver, as the second high speed USB transceiver 253, carry out a high speed USB device detection process by the second high speed USB transceiver 253 again, use and judge whether this USB device is the high speed USB device, if then this USB device promptly is connected to high speed USB controller 271 by these second high speed USB transceiver, 253 keyholed back plates; This USB device is not the high speed USB device if detect as a result, then control is switched back by the control of the 3rd USB transceiver 263 to be connected to the 2nd USB controller 275.
In addition, above-mentioned switching device shifter is to include at least one gauge tap 229, connects USB joint and high speed USB transceiver respectively, can be by the control of this speeder path controller conducting or open circuit, control the change action in path.And each port path controller still can be provided with a status displays (Status), and so driver can directly read the state at each USB port and correct operation, can be compatible with existing driver and need not to make any modification.
Secondly, see also Fig. 3, be the block schematic diagram of the embodiment of the invention when moving.As shown in the figure, embodiments of the invention are when action, be connected with one as each high speed USB transceiver and switch switch, with two high speed USB transceivers, then the first high speed USB transceiver 233 can be connected to each USB joint by one first change-over switch 291, and the second high speed USB transceiver 253 also can be connected to each USB joint by one second change-over switch 293.When the USB device is connected to arbitrary USB joint, can be at first judge that by the USB transceiver whether this USB device is USB device at full speed, if not, directly is connected to the USB controller by this USB transceiver keyholed back plate; If tentatively be judged as device at full speed, the then switching of mat change-over switch and carry out high speed USB device detection process by unappropriated high speed USB transceiver still and judge whether to be the high speed USB device, if then be connected to high speed USB controller 271 by this high speed USB transceiver keyholed back plate; If not, then change-over switch connects the USB controller with the control switchback by the USB transceiver keyholed back plate of correspondence.
At last, seeing also Fig. 4, is the circuit block diagram of another embodiment of the present invention.As shown in the figure, its USB joint 221 is connected with one the one USB transceiver 223 and one first switching device shifter 392, can select to be connected to the first high speed USB transceiver 233 or the second high speed USB transceiver 253 by this first switching device shifter 392; The 2nd USB joint 241 is connected with one the 2nd USB transceiver 243 and one second switching device shifter 394, can select to be connected to the first high speed USB transceiver 233 or the second high speed USB transceiver 253 by this second switching device shifter 394; The 3rd USB joint 261 is connected with one the 3rd USB transceiver 263 and one the 3rd switching device shifter 396, can select to be connected to the first high speed USB transceiver 233 or the second high speed USB transceiver 253 by the 3rd switching device shifter 396; The 4th USB joint 281 is connected with one the 4th USB transceiver 283 and one the 4th switching device shifter 398, can select to be connected to the first high speed USB transceiver 233 or the second high speed USB transceiver 253 by the 4th switching device shifter 398; Wherein each high speed USB transceiver is connected respectively to a high speed USB controller 271, the one USB transceiver 223 and USB transceiver 243 are connected to a USB controller, and the 3rd USB transceiver 263 and the 4th USB transceiver then are connected to the 2nd USB controller 275; Other is provided with a combinatorial path controller 39, connect each transceiver and each switching device shifter respectively, can be by this combinatorial path controller 39 each switching device shifter of control and each USB transceiver, switch to the high speed USB transceiver and control and can automatically the USB joint that is connected with the high speed USB device be controlled the path by the high speed USB controller drives.
Roughly the embodiment with shown in Figure 2 is identical with changeover program in the judgement of present embodiment, each switching device shifter is the default USB transceiver of linking, after being judged as full speed USB device, just will control the path by combinatorial path controller 39 according to the behaviour in service of high speed USB transceiver switches to still unappropriated high speed USB transceiver, to carry out high speed USB device detection process, result's decision according to detecting is to be connected to high speed USB controller 271 by this high speed USB transceiver keyholed back plate again, or switchback is connected to the USB controller by USB transceiver keyholed back plate.
In this embodiment, each switching device shifter is to include a plurality of gauge tap 229, connect the USB joint respectively to each high speed USB transceiver, the conducting or open circuit by the control of this combinatorial path controller 39, control the change action in path, then it enables (enable) or does not enable (disable) each USB transceiver by 39 controls of combinatorial path controller.
And this combinatorial path controller 39 still can be provided with a plurality of status displayses, can make the driver of USB device directly read the state at each USB port and correct operation, can be compatible with existing driver and need not make any modification.
Embodiment illustrated in fig. 2 is that framework is textural in what commonly use, utilize existing port path controller to cooperate a speeder path controller to reach purpose of the present invention, embodiment shown in Figure 4 then abandons the port path controller of commonly using, and directly comes management and control respectively to control the switching in path with a combinatorial path controller.In addition, USB control circuit of the present invention is all capable of being combined in a South Bridge chip.
Again, in the running program of the above embodiments, if all high speed USB transceivers are occupied all, then no matter this USB device is high speed USB device whether, all can only under the master control of USB transceiver, operate, but belonged to quite high utilization factor owing to insert two high speed USB devices simultaneously at a present computer, so two high speed USB transceivers of design just enough use under general situation, if the use amount of high speed USB device improves in response to user's demand in the future, also can count the high speed USB transceiver of establishing a greater number.So, both can save resource reduces cost, and can not cause user's wrong puzzlement of pegging graft, and control circuit of the present invention can be compatible fully with existing driver, so USB Design of device person also need not to change its driver for the change of cooperation circuit design.
In sum, the invention relates to a kind of USB control circuit when knowing, but the USB control circuit that refers to a kind of switching path automatically especially, it mainly is to utilize a speeder path controller to cooperate port path controller or combinatorial path controller and each switching device shifter and can automatically the USB joint control path that is connected with the high speed USB device be switched to the high speed USB transceiver and controlled by the high speed USB controller drives.So the present invention one is rich in novelty, progressive, and can utilize effect, meet the patented claim important document undoubtedly, submit application for a patent for invention in accordance with the law to for industry.
The above, it only is a preferred embodiment of the present invention, be not to be used for limiting scope of the invention process, promptly all equalizations of doing according to the described shape of the present patent application claim, structure, feature and spirit change and modify, and all should be included in the claim of the present invention.

Claims (9)

  1. But 1, a kind of USB control circuit of switching path automatically is characterized in that including:
    A plurality of USB joints can be in order to connect various USB device;
    A plurality of USB transceivers are connected to each USB joint one to one;
    At least one USB controller, respectively with its under the USB transceiver be connected, can control and drive the USB device that is connected in corresponding USB joint by each USB transceiver;
    A plurality of ports path controller is connected with USB transceiver one to one respectively;
    At least one high speed USB transceiver, each is connected with each USB joint and port path controller;
    One high speed USB controller connects each high speed USB transceiver, can control and drive the high speed USB device that is connected in the USB joint by each high speed USB L transceiver;
    One speeder path controller, connect each port path controller, can be by the cooperation of this speeder path controller and each port path controller automatically a control path that connects the USB joint of high speed USB device be switched to the high speed USB transceiver and by high speed USB controller controlling and driving;
    Wherein the junction of high speed USB transceiver and each USB joint still is provided with a switching device shifter, and its input end links to each other with affiliated USB joint, and its output terminal links to each other with each high speed USB transceiver respectively.
  2. But 2, the USB control circuit of switching path automatically according to claim 1 is characterized in that: wherein this switching device shifter is by speeder path controller control, and it may be selected to be and the conducting of arbitrary high speed USB transceiver and wherein a kind of state of opening circuit.
  3. But 3, the USB control circuit of switching path automatically according to claim 1, it is characterized in that: wherein this switching device shifter includes at least one gauge tap, and connects corresponding high speed USB transceiver with each gauge tap.
  4. But 4, the USB control circuit of switching path automatically according to claim 3 is characterized in that: wherein each gauge tap is to be connected to speeder path system device, is controlled its conducting and is opened circuit by the speeder path controller.
  5. 5, according to claim: but the USB control circuit of 1 described switching path automatically is characterized in that: and wherein the quantity of this high speed USB transceiver is less than the quantity of USB joint.
  6. But 6, the USB control circuit of switching path automatically according to claim 1 is characterized in that: wherein each port path controller is provided with a status displays.
  7. But 7, the USB control circuit of switching path automatically according to claim 1 is characterized in that: wherein this control circuit is to be combined in the South Bridge chip.
  8. But 8, a kind of USB control circuit of switching path automatically is characterized in that including:
    A plurality of USB joints are in order to connect various USB device;
    A plurality of switching device shifters are connected to each corresponding USB joint;
    A plurality of USB transceivers, respectively with its one to one the USB joint be connected;
    At least one USB controller, respectively with its under the USB transceiver be connected, control and drive the USB device that is connected in corresponding USB joint by each USB transceiver;
    At least one high speed USB transceiver, each is connected with each switching device shifter;
    One high speed USB controller connects each high speed USB transceiver, controls and drive the high speed USB device that is connected in the USB joint by each high speed USB transceiver; And
    One combinatorial path controller, connect each USB transceiver and each high speed USB transceiver, automatically a control path that connects the USB joint of high speed USB device is switched to the high speed USB transceiver by this combinatorial path controller and switching device shifter and by high speed USB controller controlling and driving.
  9. But 9, the USB control circuit of switching path automatically according to claim 8 is characterized in that: wherein this combinatorial path controller control still is provided with a plurality of status displayses.
CNB021028745A 2002-01-28 2002-01-28 USB control circuit capable of switching path automatically Expired - Lifetime CN1180354C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB021028745A CN1180354C (en) 2002-01-28 2002-01-28 USB control circuit capable of switching path automatically

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB021028745A CN1180354C (en) 2002-01-28 2002-01-28 USB control circuit capable of switching path automatically

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CN1180354C true CN1180354C (en) 2004-12-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7676612B2 (en) 2004-05-31 2010-03-09 Canon Kabushiki Kaisha Video camera device and control method thereof

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
JP2005071273A (en) * 2003-08-27 2005-03-17 Canon Inc Electronic device and method of controlling interface thereof
JP4259446B2 (en) * 2004-10-12 2009-04-30 セイコーエプソン株式会社 Transceiver, data transfer control device, and electronic device
JP5028798B2 (en) * 2005-12-27 2012-09-19 ソニー株式会社 Information processing apparatus, information processing method, and computer program
KR101494642B1 (en) * 2008-11-10 2015-02-23 삼성전자주식회사 Control Method of Portable Device Connected External Device And System Thereof
CN106066842A (en) * 2016-05-30 2016-11-02 上海华为技术有限公司 A kind of method of switch mode, SOC(system on a chip) and base station

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7676612B2 (en) 2004-05-31 2010-03-09 Canon Kabushiki Kaisha Video camera device and control method thereof

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