CN1459690A - Hot connect disconnect input/output module - Google Patents
Hot connect disconnect input/output module Download PDFInfo
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- CN1459690A CN1459690A CN 02120416 CN02120416A CN1459690A CN 1459690 A CN1459690 A CN 1459690A CN 02120416 CN02120416 CN 02120416 CN 02120416 A CN02120416 A CN 02120416A CN 1459690 A CN1459690 A CN 1459690A
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- hot plug
- current
- bus
- limiting circuit
- power supply
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Abstract
A hot attach-detach I/O module features that the GND pin of bus in the module is such used that when a device is attached to or detached from the module, it sends a signal to operate system and the system provides a current via switch and current limiter to the device to make it work normally.
Description
Technical field
The present invention relates to a kind of hot plug input/output module, particularly a kind of signalisation system that utilizes the grounding leg (GND PIN) of bus in this module is so that the module that the system power supply supply can be more stable.
Background technology
The notion of computer-related applications peripheral unit hot-swappable (Hot Plugging) is in order to install or remove the device on the computer system more easily.So that Winchester disk drive to be installed is example, necessary at least through following step: must 2. open computer housing after the shutdown earlier with computer shutdown 1., relevant wiring is installed, 3. install casing again, opening power 4. drives this hard disk by operating system and related software again.Though be simple several steps, if can't one-step installation finish, the just constantly action of repeat switch machine just must face the wait that operating system loads and finishes in case computer operating relates to switching on and shutting down, and this stand-by period is easy to cause that the user is sick of.Therefore, device that can hot plug on computer system can reduce the many puzzlements of user really, for sizable help that truly has of the popularization and application of computing machine.
Since install the device of hot plug have can not will the advantage of system closedown, so be the timely operating system of target in design with the continuous working, for example webserver, exchange room etc., its relevant expanding device all adopts the design of hot plug.Its reason mainly is that the object of these system services involves extensively, all can not or take out any module, device, control card etc. and shutdown system because of the needs adding, so that disturb or interrupt the processing of real-time information.
Can understand by above explanation, hot plug device not only can be applied in personal computer, and is also quite extensive in the application of server, for example the power supply unit of hot plug, disc driver or the like.The device of this hot plug all can use in system under the situation of (start), substitute module at any time optionally, and need not turn off total system, also or the user extract certain module because of carelessness, the start situation under, system can not work as machine yet.Support that at present the technical specification of hot plug has IEEE1394, PCMCIA and USB.
Though hot plug device can promote the convenience that computing machine uses; but these devices are constantly installed in system and are removed; certainly will cause impact to a certain degree to the degree of stability of System Operation; this is because when new hot plug device is got involved the running of computing machine; usually can moment draw a large amount of electric currents from power system; with the process that then can enter decay of drawing of after-current, degree depends on that the replacement time of device is till this device is stablized normal operation.Experienced slip-stick artist knows, this instantaneous large-current can produce sizable injury to electronic product, even the circuit on the damage electronic product and make this electronic product to use, in addition, more the current peak because of power system constantly changes, and influences the degree of stability of total system power supply supply.So under the situation of taking into account system power supply supply degree of stability, global design just remains to be improved.
Summary of the invention
In view of above existing technical matters, the present invention aims to provide a kind of system power supply that can reduce and supplies unsettled hot plug input/output module.
For realizing the purpose of aforementioned stable system power supply supply, the present invention utilizes the signal of this module grounding leg as detection signal, when inserting new device on this module, by this detection signal reporting system, system is known has new device to come in, send signal by system again,, allow electric current operate required power supply for installing by current-limiting circuit to open the switch of this module.
Therefore the present invention includes a bus that meets the hot plug communications protocol; One current-limiting circuit is connected to this bus; An and switch that is connected with current-limiting circuit and system, wherein when this bus has a new hot plug device to insert, change by voltage quasi position, send one and detect signal to system, system is known has new device to come in, system sends a current signal again, to open the switch of current-limiting circuit, allows power supply supply with the required power supply of this hot plug device running by current-limiting circuit.
Feature of the present invention and example conjunction with figs. are described in detail as follows.
Description of drawings
Fig. 1 is a system block diagrams of the present invention;
Fig. 2 is preferred embodiment of the present invention.
Embodiment
Electric current supply instability is because hot plug device inserts the moment of bus can draw big electric current from power-supply system and cause, this instantaneous large-current can be to making the power system instability, also can injure electron device in the hot plug device, therefore, if can before power supply enters bus, design a current-limiting circuit, in order to reduce the impact of immediate current, must make the power supply supply more stable, to increase the degree of stability of System Operation to power system and hot plug device.
Fig. 1 is a system block diagrams of the present invention, and the present invention is that a kind of system power supply that can reduce is supplied unsettled hot plug input/output module 10, includes a bus 11 that meets the hot plug communications protocol; One current-limiting circuit 12 is connected to this bus 11; An and switch 13 that is connected with current-limiting circuit 12 and system 20, wherein when this bus 11 has a new hot plug device to insert, change by voltage quasi position, send one and detect signal to system 20, system 20 is known has new device to come in, system sends a power supply signal again, with the switch 13 of opening current-limiting circuit, allows power supply pass through current-limiting circuit 12 and supplies with the required power supply of this hot plug device running.
During actual operation, as shown in Figure 1, the present invention has a bus that meets the hot plug communications protocol, the bus that meets the hot plug communications protocol has IEEE 1394, PCMCIA and USB etc., these buses are interfaces that various computer peripheral apparatus and system are linked up, and therefore except data bus, address bus and control bus are arranged, operate required power supply and ground connection pin in addition, that is VCC and GND, as in VCC PIN 11 and GND PIN 112.When bus 11 is not installed insertion, grounding leg 112 output signals are by the resistance of a PULL HIGH, and it is the accurate position of high voltage that its output voltage is promoted, and this moment, system received the signal of this HIGH, just judge that device does not insert, also just can not send a power supply signal and use for this bus 11.
And when bus 11 has device to insert, the voltage quasi position of its grounding leg 112 can become LOW, this moment, system's 20 judgements had device to come in, just can send a current signal, in order to make the switch 13 that the control power supply flows into current-limiting circuit, make power supply be passed through current-limiting circuit 12 and enter hot plug device on the bus 11, the main effect system of this current-limiting circuit 12 inserts 11 moments of bus in order to restriction when hot plug device, the big electric current that power-supply system is drawn.Yet the big electric current of this moment is not to be the required strength of current of this device running, but because the characteristic of electron device itself causes, the electric current when entire circuit enters steady-state response is only and operates required electric current.
Fig. 2 is preferred embodiment of the present invention, is example with the bus that meets the USB communications protocol, and the hot plug module that meets the USB communications protocol is described.
As shown in Figure 2, usb bus 14 has four points of connection, is respectively VCC141, GND142, D+143 and D-144, and D+143 and D-144 are in order to the transmission data, and VCC141 is connected with current-limiting circuit 12, and GND142 then exports one and detects signal.When usb bus 14 does not install insertion, grounding leg GND142 output signal is by the resistance of a PULL HIGH, it is the accurate position of high voltage that its output voltage is promoted, system 20 receives the signal of these HIGH at this moment, just judge that device does not insert, also just can not send a power supply signal and use for this usb bus 14.
And when usb bus 14 has device to insert, the voltage quasi position of its GND grounding leg 142 can become LOW, this moment, system's 20 judgements had the hot plug device that meets the USB standard to come in, just can send a current signal, in order to make the switch 13 that the control power supply flows into current-limiting circuit, make power supply be passed through current-limiting circuit 12 and enter hot plug device on the usb bus 14.
The communications protocol that meets the hot plug standard now has quite multiple, except USB, IEEE1394 and PCMCIA is arranged still, and mouse also can use the degree of stability of the present invention with the increase system with the PS2 interface that keyboard uses certainly.And traditional PCI or AGP interface, can between pci bus and system, design a specific circuit in the technology that has disclosed, with the influence to system when installing or removing of the device that reduces this PCI or AGP interface, so the present invention also can use the bus unit of PCI and AGP interface.
By above-mentioned explanation, the present invention's hot plug input/output module has following effect:
1. can reduce because the immediate current that is produced is installed or removed to hot plug device and change the influence that system power supply is supplied, so that power supply is supplied with preferable degree of stability.
2. reduce because of the injury of instantaneous large-current, to prolong the serviceable life of product to hot plug device.
Though the present invention discloses as above with aforementioned preferred embodiment; yet it is not in order to limit the present invention; the those of ordinary skill of the industry; without departing from the spirit and scope of the present invention; can carry out variation and retouching that various think ofs easily reach, therefore scope of patent protection of the present invention should be as the criterion with the scope that claims define.
Claims (8)
1. hot plug input/output module is characterized in that comprising:
One meets the bus of hot plug communications protocol;
One current-limiting circuit is connected to this bus; And
One switch is connected with this current-limiting circuit;
Wherein when this bus has a new hot plug device to insert, computer system detects the change of the accurate position of signal voltage by this module, send a power supply signal,, allow power supply supply with the required power supply of this hot plug device running by current-limiting circuit to open the switch of this current-limiting circuit.
2. hot plug input/output module as claimed in claim 1 is characterized in that described voltage quasi position when detecting signal device hot plug device is HIGH, and voltage quasi position was LOW when device had hot plug device.
3. hot plug input/output module as claimed in claim 1 is characterized in that the described signal that detects is the grounding leg output that is met the bus of hot plug communications protocol by this.
4. hot plug input/output module is characterized in that comprising:
One meets the bus of hot plug communications protocol;
One current-limiting circuit is connected to this bus;
One switch is connected with this current-limiting circuit; And
One detects signal, wherein when this bus had a new hot plug device to insert, computer system was sent a power supply signal by detecting the change of the accurate position of signal voltage, to open the switch of this current-limiting circuit, allow power supply supply with the required power supply of this hot plug device running by current-limiting circuit.
5. hot plug input/output module as claimed in claim 4 is characterized in that described voltage quasi position when detecting signal device hot plug device is HIGH, and voltage quasi position was LOW when device had hot plug device.
6. hot plug input/output module as claimed in claim 4 is characterized in that the described signal system that detects meets the grounding leg output of the bus of hot plug communications protocol by this.
7. hot plug input/output module is characterized in that comprising:
One meets the bus of hot plug communications protocol;
One current-limiting circuit is connected to this bus;
One switch is connected with this current-limiting circuit; And
One detects signal, grounding leg output by this bus, wherein when this bus has a new hot plug device to insert, this detects the accurate position of voltage of signals and can change, so that power supply can be opened the switch of this current-limiting circuit by current signal, allow power supply supply with the required power supply of this hot plug device running by current-limiting circuit.
8. hot plug input/output module as claimed in claim 7 is characterized in that described voltage quasi position when detecting signal device hot plug device is HIGH, and voltage quasi position was LOW when device had hot plug device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02120416 CN1459690A (en) | 2002-05-24 | 2002-05-24 | Hot connect disconnect input/output module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02120416 CN1459690A (en) | 2002-05-24 | 2002-05-24 | Hot connect disconnect input/output module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1459690A true CN1459690A (en) | 2003-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02120416 Pending CN1459690A (en) | 2002-05-24 | 2002-05-24 | Hot connect disconnect input/output module |
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| CN (1) | CN1459690A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100447770C (en) * | 2005-09-23 | 2008-12-31 | 英业达股份有限公司 | Hot plug-pull control system and method |
| CN100462954C (en) * | 2007-03-14 | 2009-02-18 | 杭州华三通信技术有限公司 | SPI4 buds interface card supporting hot swap, corresponding host machine and method thereof |
| CN101331438B (en) * | 2006-02-23 | 2010-08-18 | 富士通株式会社 | Maintenance guidance display device, maintenance guidance display process |
| CN103838341A (en) * | 2012-11-23 | 2014-06-04 | 昆达电脑科技(昆山)有限公司 | Current limiting device |
-
2002
- 2002-05-24 CN CN 02120416 patent/CN1459690A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100447770C (en) * | 2005-09-23 | 2008-12-31 | 英业达股份有限公司 | Hot plug-pull control system and method |
| CN101331438B (en) * | 2006-02-23 | 2010-08-18 | 富士通株式会社 | Maintenance guidance display device, maintenance guidance display process |
| CN100462954C (en) * | 2007-03-14 | 2009-02-18 | 杭州华三通信技术有限公司 | SPI4 buds interface card supporting hot swap, corresponding host machine and method thereof |
| CN103838341A (en) * | 2012-11-23 | 2014-06-04 | 昆达电脑科技(昆山)有限公司 | Current limiting device |
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