CN201430603Y - Mobile terminal - Google Patents
Mobile terminal Download PDFInfo
- Publication number
- CN201430603Y CN201430603Y CN2009200218082U CN200920021808U CN201430603Y CN 201430603 Y CN201430603 Y CN 201430603Y CN 2009200218082 U CN2009200218082 U CN 2009200218082U CN 200920021808 U CN200920021808 U CN 200920021808U CN 201430603 Y CN201430603 Y CN 201430603Y
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- China
- Prior art keywords
- master chip
- pin
- interface
- main chip
- external interface
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a mobile terminal which comprises a main chip and a radio frequency chip connected with the main chip, and further comprises an external interface; the data wire of the external interface is connected with an internal interface of the main chip for communication; the power supply line of the external interface is only connected with a battery charging pin of the main chip; the internal interface of the main chip is powered by an internal power source of the main chip, and the main chip takes the status detection signal of the battery charging pin as the external equipment status detection signal at the same time. The original level switching circuit of the mobile terminal is removed, the external power supply pin of the main chip lies idle, and the power disconnection function and the power supply function are instead respectively performed by the battery charging pin and the internal power source of the main chip, therefore, the original functions of the mobile terminal are remained and at the same time the cost is significantly reduced.
Description
Technical field
The utility model relates to moving communicating field, relates in particular to a kind of portable terminal.
Background technology
In the prior art, each mobile phone producer generally adopts the design of USB and charging port unification, is USB device or charging device by the differential signal level separation current device that detects USB port.
The power supply circuits of peripheral port generally use the VBUS bus in the USB standard interface, the externally fed pin (VBUS pin) on the inner master chip of mobile phone and the VBUS bus of mobile phone USB port with link to each other for the pin of battery charge (DC_IN pin).
Because the available voltage range of the VBUS pin of mobile phone master chip does not meet standard-required, in the prior art, added level shifting circuit mostly between the VBUS of master chip pin and charging pin (DC_IN pin), the power supply of the VBUS pin of the inner master chip of assurance mobile phone is within normal scope.But, so also just improved cost greatly.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of portable terminal, makes it under the prerequisite that keeps original function, reduces cost.
In order to solve the problems of the technologies described above, the utility model proposes a kind of portable terminal, the radio frequency chip that comprises master chip, connection master chip, also comprise external interface, the data wire of this external interface is connected to communicate with the internal interface of described master chip, the power line of described external interface only is connected with the battery charge pin of described master chip, the internal electric source power supply of the internal interface of described master chip by this master chip, and this master chip with the state detection signal of described battery charge pin simultaneously as the external device status detection signal.
Preferably, described external interface is a USB interface; This USB interface differential data line connects the difference pin of described master chip, and its power line only connects the battery charge pin of described master chip.
Wherein, the externally fed pin of described master chip is unsettled.
Wherein, described master chip detect the state of described battery charge pin and the interrupt signal that produces also as the external equipment interrupt signal of this master chip.
In addition, be connected to filter circuit on the data wire of described external interface.
Wherein, described filter circuit is a double diode, its plus earth, and negative pole connects the data wire of described external interface.
In the utility model, after original level shifting circuit removal, the externally fed pin of master chip is just idle, and its interrupt function and function of supplying power are substituted by the internal electric source of battery charge pin and master chip respectively, thereby kept the original function of portable terminal, reduced cost simultaneously greatly.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model.
Embodiment
The utility model is elaborated below in conjunction with accompanying drawing.
With reference to figure 1, illustrate the structural representation of an embodiment of the utility model.As shown in the figure, comprise the radio frequency chip of master chip, connection master chip, also comprise the external USB interface.
Wherein said external USB interface comprises 1 to 5 five pin.Described pin two and 3 is two differential data line USBD-and USBD+, also comprises pin one power line VBUS, and pin 5 earth connections.Pin 4 is unsettled.
Described differential data line USBD+ is connected with USB_DM with the USB_DP of described master chip respectively with USBD-, with mutual data transmission.
Described power supply VBUS is connected with the charging pin of described master chip, just pin DC_IN.Is and the externally fed pin USB_VBU of described master chip (VBS in the accompanying drawing?) unsettled (in the prior art, this pin connects described power line VBUS by a level shifting circuit).
Anodal all ground connection of described diode D1 and D2, negative pole then connects the USBD+ and the USBD-data wire of described USB interface respectively, with will be from the undersuing filtering of master chip USB_DP and USB_DM pin.
In the prior art, power line VBUS not only is connected to charge with the DC_IN pin of master chip, also is connected with the USB_VBU pin of described master chip; At this moment, the effect played of described USB_VBU pin has two:
1, by powering for the inside usb circuit of described master chip with the acquisition external power source that is connected of described VBUS power line;
2, carry out status checkout, detect the insertion state of USB device, and with interrupt mode notice master chip.
After present embodiment has been deleted the VBUS bus and the USB_VBU pin is connected, can realize above-mentioned two functions equally: the power supply of the USB interface of described master chip inside adopts internal electric source to power, and promptly the power supply that offers master chip by battery is powered.And when described DC_IN pin generation interrupt notification, when having charging device to insert to show, simultaneously with the signalisation master chip of this interrupt signal as the access of external USB equipment.
So, just save the level shifting circuit between VBUS bus and the USB_VBU pin fully, reduced cost greatly.
Need to prove that described external interface also is limited to the interface that USB interface can also be other type, for example serial line interface or the like is same suitable.
Above disclosed only is preferred embodiment of the present utility model, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (6)
1, a kind of portable terminal, the radio frequency chip that comprises master chip, connection master chip, also comprise external interface, the data wire of this external interface is connected to communicate with the internal interface of described master chip, it is characterized in that: the power line of described external interface only is connected with the battery charge pin of described master chip, the internal electric source power supply of the internal interface of described master chip by this master chip, and this master chip with the state detection signal of described battery charge pin simultaneously as the external device status detection signal.
2, portable terminal according to claim 1 is characterized in that, described external interface is a USB interface; This USB interface differential data line connects the difference pin of described master chip, and its power line only connects the battery charge pin of described master chip.
3, portable terminal according to claim 1 and 2 is characterized in that, the externally fed pin of described master chip is unsettled.
4, portable terminal according to claim 1 and 2 is characterized in that, described master chip detect the state of described battery charge pin and the interrupt signal that produces also as the external equipment interrupt signal of this master chip.
5, portable terminal according to claim 1 and 2 is characterized in that, is connected to filter circuit on the data wire of described external interface.
6, portable terminal according to claim 5 is characterized in that, described filter circuit is a double diode, its plus earth, and negative pole connects the data wire of described external interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200218082U CN201430603Y (en) | 2009-04-24 | 2009-04-24 | Mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200218082U CN201430603Y (en) | 2009-04-24 | 2009-04-24 | Mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201430603Y true CN201430603Y (en) | 2010-03-24 |
Family
ID=42034342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200218082U Expired - Fee Related CN201430603Y (en) | 2009-04-24 | 2009-04-24 | Mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201430603Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223439A (en) * | 2011-04-29 | 2011-10-19 | 中兴通讯股份有限公司 | Electronic equipment with USB interface and USB communication starting method thereof |
| CN104378086A (en) * | 2013-08-12 | 2015-02-25 | 联想(北京)有限公司 | Radio frequency chip, radio frequency circuit and electronic device |
-
2009
- 2009-04-24 CN CN2009200218082U patent/CN201430603Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223439A (en) * | 2011-04-29 | 2011-10-19 | 中兴通讯股份有限公司 | Electronic equipment with USB interface and USB communication starting method thereof |
| CN102223439B (en) * | 2011-04-29 | 2014-09-17 | 中兴通讯股份有限公司 | Electronic equipment with USB interface and USB communication starting method thereof |
| US9110650B2 (en) | 2011-04-29 | 2015-08-18 | Zte Corporation | Electronic device having USB interface and method for starting USB communication with such device |
| CN104378086A (en) * | 2013-08-12 | 2015-02-25 | 联想(北京)有限公司 | Radio frequency chip, radio frequency circuit and electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100324 Termination date: 20120424 |