CN102866768A - Device and power-saving method based on USB (universal serial bus) master device - Google Patents
Device and power-saving method based on USB (universal serial bus) master device Download PDFInfo
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- CN102866768A CN102866768A CN201210263117XA CN201210263117A CN102866768A CN 102866768 A CN102866768 A CN 102866768A CN 201210263117X A CN201210263117X A CN 201210263117XA CN 201210263117 A CN201210263117 A CN 201210263117A CN 102866768 A CN102866768 A CN 102866768A
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Abstract
The invention relates to a device and a power-saving method based on a USB (universal serial bus) master device. The device and the power-saving method can reduce energy consumption of the USB master device. The power-saving device comprises a 3.3V power supply, a voltage transformation module, a USB protocol chip, a control module, a USB interface and a switch, the control module comprises a main controller and a normally open contact, the main controller controls the USB interface and the switch and is used for judging whether a USB slave device is inserted into the USB interface or pulled out from the USB interface, the control switch is switched off when the USB slave device is not inserted or pulled out, the power supply does not supply power for the USB protocol chip and the voltage transformation module, the control switch is switched on when the slave device is inserted into the USB interface, the power supply supplies power for the USB protocol chip and the voltage transformation module, the problem of energy consumption of the USB protocol chip and the voltage transformation module of the USB master device is solved when the USB slave device is not inserted or pulled out, and service time of a master device battery is prolonged.
Description
Technical field
The invention belongs to field of computer technology, be specifically related to a kind of device and power-saving method based on the USB main equipment that can reduce USB main equipment energy consumption.
Background technology
At present, the mobile storage technology is along with people's life improves constantly, and the application of USB device is more and more wider.USB device is divided into main equipment (HOST) and from equipment (SLAVE), and what be in core status is main equipment, and the data transmission of any USB all must be initiated and control by main equipment, and all USB peripheral hardwares can only connect with main equipment.The role that tradition is played the part of the USB main equipment is only limited to PC, and namely the USB peripheral hardware can only carry out mutual file and exchanges data by PC.And along with the research and development of Embedded USB main equipment, so that the role of USB main equipment is not limited only to PC, the USB device with host function is arisen at the historic moment.But the USB main equipment of PC still needs to the peripheral hardware power supply, and USB main equipment power supply is kept by battery.Powered battery is compared finite capacity with the USB main equipment power supply on the traditional PC.In addition, along with the development of conservation-minded society, large-scale device energy conservation transformation is carried out, for the control of also need economizing on electricity of widely used battery-powered USB main equipment.
Summary of the invention
The objective of the invention is for solving based on the usb protocol chip in the battery powered USB main equipment and LDO chip energy consumption problem, and provide a kind of device based on the USB main equipment and power-saving method, can accurately and timely carry out energy-conservation switching, simple in structure, very useful.
The object of the present invention is achieved like this:
A kind of battery saving arrangement based on the USB main equipment comprises 3.3V power supply, voltage transformation module, usb protocol chip, control module, USB interface and switch, it is characterized in that,
3.3V power supply is used to control module, usb protocol chip and voltage transformation module power supply 3.3V;
Voltage transformation module, the 3.3V voltage transitions that is used for power supply is supplied with is 5V, for the USB that inserts USB interface from power devices;
Switch is arranged between power supply and the usb protocol chip and between power supply and the voltage transformation module;
Control module, whether judge has USB insert or have USB to extract from equipment from equipment at the USB interface place, and when there not being USB to insert or USB when extracting from equipment from equipment, gauge tap disconnects, and power supply is to usb protocol chip and voltage transformation module power supply; On judging USB interface, have when inserting from equipment, gauge tap is closed, and power supply is usb protocol chip and voltage transformation module power supply, and voltage transformation module transfers 3.3V that power supply supplies to 5V, for USB interface from power devices, guarantee that USB main equipment and USB are from the normal operation of equipment.
Described control module comprises master controller and normal battle the, wherein main controller controls USB interface and switch; Set up a circuit between the ground wire (GND) of USB interface and master controller, the centre arranges normal a battle, and when inserting from equipment without USB, disconnect the normal battle between the GND of USB interface and the master controller, and USB main controller controls switch disconnects; When having on the USB interface when inserting from equipment, the normal battle between the GND of USB interface and the master controller is closed, and master controller receives low level signal, the main controller controls switch closure; When USB extracted from equipment from USB interface, disconnected the normal battle between the GND of USB interface and the master controller, and master controller is received high level signal, and the main controller controls switch disconnects.
Described voltage transformation module adopts low pressure difference linear voltage regulator LDO chip to realize.
A kind of power-saving method based on the USB main equipment is characterized in that, comprising:
Whether the first, judging has USB from the equipment insertion at the USB interface place or has USB to extract from equipment;
The second, when there not being USB to insert or USB when extracting from equipment from equipment, gauge tap disconnects, and power supply is to usb protocol chip and voltage transformation module power supply;
The 3rd, the gauge tap closure is arranged on judging USB interface when inserting from equipment, power supply is usb protocol chip and voltage transformation module power supply, voltage transformation module transfers 3.3V that power supply supplies to 5V, for USB interface from power devices, guarantee that USB main equipment and USB are from the normal operation of equipment.
Whether judgement has USB to insert or have USB to extract from equipment from equipment may further comprise the steps at the USB interface place:
Step 1.1, set up a circuit between the master controller of the ground wire (GND) of USB interface and control module, the centre arranges normal a battle, when inserting from equipment without USB, disconnect the normal battle between the GND of USB interface and the master controller, and USB main controller controls switch disconnects;
Step 1.2, when having on the USB interface when inserting from equipment, the normal battle between the GND of USB interface and the master controller is closed, and master controller receives low level signal, the main controller controls switch closure;
Step 1.3, when USB extracted from equipment from USB interface, disconnected the normal battle between the GND of USB interface and the master controller, and master controller is received high level signal, and the main controller controls switch disconnects.
Characteristics of the present invention and good effect are as follows: by between power supply and the usb protocol chip and between power supply and the voltage transformation module switch being set, and when USB does not insert from equipment, usb protocol chip, all not power consumptions of voltage transformation module.By between the I/O of the ground wire of USB interface and USB controller, setting up a circuit and be set normal battle, detect USB from the insertion of equipment with extract, and connection and disconnection by USB main controller controls switch, guarantee the normal operation of master-slave equipment, and when extracting from equipment, stop to usb protocol chip, voltage transformation module power supply.Its characteristic is that it has avoided after USB does not insert or extracts from equipment the power consumption of usb protocol chip, voltage transformation module, the service time of having improved the main equipment battery.Rely on the model of powered battery USB main equipment more energy-conservation, more convenient with respect to tradition.
Description of drawings
Fig. 1 is the structural drawing of traditional USB main equipment.
Fig. 2 is based on the power saving structure figure of USB main equipment.
Embodiment
The present invention is further described below in conjunction with accompanying drawing.
A kind of battery saving arrangement based on the USB main equipment comprises 3.3V power supply 1, voltage transformation module 4, usb protocol chip 3, control module, USB interface 5 and switch 6, and wherein control module comprises master controller 2 and normal battle 7, it is characterized in that,
3.3V power supply 1 is used to control module, usb protocol chip and voltage transformation module power supply 3.3V;
Voltage transformation module 4, the 3.3V voltage transitions that is used for power supply is supplied with is 5V, for the USB that inserts USB interface from power devices; Described voltage transformation module adopts the LDO(low pressure difference linear voltage regulator) the chip realization;
Switch 6 is arranged between power supply and the usb protocol chip and between power supply and the voltage transformation module;
Control module, whether be used for to judge has USB insert or have USB to extract from equipment from equipment at USB interface 5 places, and when there not being USB to insert or USB when extracting from equipment from equipment, gauge tap 6 disconnects, and power supply 1 is to usb protocol chip 3 and voltage transformation module 4 power supplies; On judging USB interface 5, have when inserting from equipment, gauge tap 6 closures, power supply 1 are usb protocol chip 3 and voltage transformation module 4 power supplies, and voltage transformation module 4 transfers power supply 1 3.3V that supplies to 5V, for USB interface 5 from power devices, guarantee that USB main equipment and USB are from the normal operation of equipment.
Described control module comprises master controller 2 and normal battle 7, wherein main controller controls USB interface 5 and switch 6; Between the ground wire (GND) of USB interface 5 and master controller 2, set up a circuit 8, the centre arranges a normal battle 7, when inserting from equipment without USB, disconnect the normal battle 7 between the GND of USB interface 5 and the master controller 2, and USB main controller controls switch 6 disconnects; When having on the USB interface 5 when inserting from equipment, the closure normal battles 7 between the GND of USB interface 5 and the master controller 2, master controller 2 receives low level signal, master controller 2 gauge tap 6 closures; When USB from equipment from USB interface 5 when extracting, disconnect the normal battles 7 between the GND of USB interface 5 and the master controller 2, master controller 2 is received high level signal, master controller 2 gauge tap disconnect.
A kind of power-saving method based on the USB main equipment is characterized in that, comprising:
Whether the first, judging has USB from the equipment insertion at USB interface 5 places or has USB to extract from equipment;
The second, when there not being USB to insert or USB when extracting from equipment from equipment, gauge tap 6 disconnects, and power supply is to usb protocol chip 3 and voltage transformation module 4 power supplies;
The 3rd, on judging USB interface 5, have when inserting from equipment, gauge tap 6 closures, power supply 1 is usb protocol chip 3 and voltage transformation module 4 power supplies, voltage transformation module 4 transfers 3.3V that power supply supplies to 5V, for USB interface 5 from power devices, guarantee that USB main equipment and USB are from the normal operation of equipment.
Whether judgement has USB to insert or have USB to extract from equipment from equipment may further comprise the steps at USB interface 5 places:
Step 1.1, set up a circuit between the master controller 2 of the ground wire (GND) of USB interface 5 and control module, the centre arranges one and often makes war 7, when inserting from equipment without USB, disconnect the normal battle 7 between the GND of USB interface 5 and the master controller 2, and USB master controller 2 gauge tap 6 disconnect;
Step 1.2, when having on the USB interface 5 when inserting from equipment, the closure normal battles 7 between the GND of USB interface 5 and the master controller 2, master controller 2 receives low level signal, and master controller 2 gauge tap are closed;
Step 1.3, when USB from equipment from USB interface 5 when extracting, disconnect the normal battles 7 between the GND of USB interface 5 and the master controller 2, master controller 2 is received high level signal, master controller 2 gauge tap 6 disconnect.
In sum, by between power supply and the usb protocol chip and between power supply and the voltage transformation module switch being set, when USB does not insert from equipment, usb protocol chip, all not power consumptions of voltage transformation module.By between the I/O of the ground wire of USB interface and USB controller, setting up a circuit and be set normal battle, detect USB from the insertion of equipment with extract, and connection and disconnection by USB main controller controls switch, guarantee the normal operation of master-slave equipment, and when extracting from equipment, stop to usb protocol chip, voltage transformation module power supply.Its characteristic is that it has avoided after USB does not insert or extracts from equipment the power consumption of usb protocol chip, voltage transformation module, the service time of having improved the main equipment battery.Rely on the model of powered battery USB main equipment more energy-conservation, more convenient with respect to tradition.
Claims (6)
1. the battery saving arrangement based on the USB main equipment comprises 3.3V power supply, voltage transformation module, usb protocol chip, control module, USB interface and switch, it is characterized in that,
3.3V power supply is used to control module, usb protocol chip and voltage transformation module power supply 3.3V;
Voltage transformation module, the 3.3V voltage transitions that is used for power supply is supplied with is 5V, for the USB that inserts USB interface from power devices;
Switch is arranged between power supply and the usb protocol chip and between power supply and the voltage transformation module;
Control module, whether judge has USB insert or have USB to extract from equipment from equipment at the USB interface place, and when there not being USB to insert or USB when extracting from equipment from equipment, gauge tap disconnects, and power supply is to usb protocol chip and voltage transformation module power supply; On judging USB interface, have when inserting from equipment, gauge tap is closed, and power supply is usb protocol chip and voltage transformation module power supply, and voltage transformation module transfers 3.3V that power supply supplies to 5V, for USB interface from power devices, guarantee that USB main equipment and USB are from the normal operation of equipment.
2. the battery saving arrangement based on the USB main equipment according to claim 1 is characterized in that, described control module comprises master controller and normal battle the, wherein main controller controls USB interface and switch; Set up a circuit between the ground wire (GND) of USB interface and master controller, the centre arranges normal a battle, and when inserting from equipment without USB, disconnect the normal battle between the GND of USB interface and the master controller, and USB main controller controls switch disconnects; When having on the USB interface when inserting from equipment, the normal battle between the GND of USB interface and the master controller is closed, and master controller receives low level signal, the main controller controls switch closure; When USB extracted from equipment from USB interface, disconnected the normal battle between the GND of USB interface and the master controller, and master controller is received high level signal, and the main controller controls switch disconnects.
3. the battery saving arrangement based on the USB main equipment according to claim 1 is characterized in that, described voltage transformation module adopts low pressure difference linear voltage regulator LDO chip to realize.
4. the power-saving method based on the USB main equipment is characterized in that, comprising:
Whether judgement has USB from the equipment insertion or has USB to extract from equipment at the USB interface place;
When there not being USB to insert or USB when extracting from equipment from equipment, gauge tap disconnects, and power supply is to usb protocol chip and voltage transformation module power supply;
On judging USB interface, have when inserting from equipment, gauge tap is closed, and power supply is usb protocol chip and voltage transformation module power supply, and voltage transformation module transfers 3.3V that power supply supplies to 5V, for USB interface from power devices, guarantee that USB main equipment and USB are from the normal operation of equipment.
5. the power-saving method based on the USB main equipment according to claim 4 is characterized in that, whether described judgement has USB to insert or the step that has USB to extract from equipment specifically comprises from equipment at the USB interface place:
Between the master controller of the ground wire (GND) of USB interface and control module, set up a circuit, the centre arranges normal a battle, when inserting from equipment without USB, disconnect the normal battle between the GND of USB interface and the master controller, and USB main controller controls switch disconnects; When having on the USB interface when inserting from equipment, the normal battle between the GND of USB interface and the master controller is closed, and master controller receives low level signal, the main controller controls switch closure; When USB extracted from equipment from USB interface, disconnected the normal battle between the GND of USB interface and the master controller, and master controller is received high level signal, and the main controller controls switch disconnects.
6. the power-saving method based on the USB main equipment according to claim 4 is characterized in that, described voltage transformation module adopts low pressure difference linear voltage regulator LDO chip to realize.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210263117XA CN102866768A (en) | 2012-07-27 | 2012-07-27 | Device and power-saving method based on USB (universal serial bus) master device |
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| CN201210263117XA CN102866768A (en) | 2012-07-27 | 2012-07-27 | Device and power-saving method based on USB (universal serial bus) master device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103678213A (en) * | 2013-03-28 | 2014-03-26 | 威盛电子股份有限公司 | Universal serial bus hub and control method thereof |
| CN106294251A (en) * | 2015-05-27 | 2017-01-04 | 联想(北京)有限公司 | Electronic equipment and management method thereof |
| US10216253B2 (en) | 2013-03-28 | 2019-02-26 | Via Technologies, Inc. | Universal serial bus hub and control method thereof |
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| CN201707641U (en) * | 2010-06-10 | 2011-01-12 | 盛乐信息技术（上海）有限公司 | Electricity-saving starting-up control device |
| CN102221872A (en) * | 2010-04-16 | 2011-10-19 | 宏碁股份有限公司 | Power supplying device and method |
| US20110314201A1 (en) * | 2009-09-19 | 2011-12-22 | Huizhou Tcl Mobile Communication Co., Ltd | Method and device for identifying universal serial bus (usb) insertion or charger insertion of mobile terminal |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20110314201A1 (en) * | 2009-09-19 | 2011-12-22 | Huizhou Tcl Mobile Communication Co., Ltd | Method and device for identifying universal serial bus (usb) insertion or charger insertion of mobile terminal |
| CN102221872A (en) * | 2010-04-16 | 2011-10-19 | 宏碁股份有限公司 | Power supplying device and method |
| CN201707641U (en) * | 2010-06-10 | 2011-01-12 | 盛乐信息技术（上海）有限公司 | Electricity-saving starting-up control device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103678213A (en) * | 2013-03-28 | 2014-03-26 | 威盛电子股份有限公司 | Universal serial bus hub and control method thereof |
| CN103678213B (en) * | 2013-03-28 | 2017-02-15 | 威盛电子股份有限公司 | Universal serial bus hub and control method thereof |
| US10216253B2 (en) | 2013-03-28 | 2019-02-26 | Via Technologies, Inc. | Universal serial bus hub and control method thereof |
| CN106294251A (en) * | 2015-05-27 | 2017-01-04 | 联想(北京)有限公司 | Electronic equipment and management method thereof |
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Application publication date: 20130109 |