CN201323446Y - Static-free handheld mobile device with soft USB function - Google Patents
Static-free handheld mobile device with soft USB function Download PDFInfo
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- CN201323446Y CN201323446Y CNU2008201563564U CN200820156356U CN201323446Y CN 201323446 Y CN201323446 Y CN 201323446Y CN U2008201563564 U CNU2008201563564 U CN U2008201563564U CN 200820156356 U CN200820156356 U CN 200820156356U CN 201323446 Y CN201323446 Y CN 201323446Y
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Abstract
The utility model relates to a method for a static-free handheld mobile device with the soft USB function, which is used for strengthening the anti-static protection capability of a mobile device. According to the method, a bipolar TVS tube with ultralow capacity is added to a mobile terminal, the resistance of the matched resistor is increased, the GPIO configuration used for simulating the USB function is changed, and the complete appliance tightness of the mobile terminal is improved, so that the mobile terminal has protection capability improvement in the electrostatic discharge test. The method for the static-free handheld mobile device with the soft USB function greatly improves the anti-static protection capability of the mobile terminal based on Spreadtrum SC6600D and NXP PNX4904.
Description
Technical field
The present invention relates to the hand-held mobile terminal equipment of a kind of USB of having (Universal Serial Bus, USB is hereinafter to be referred as USB) function, be specifically related to a kind of antistatic handheld mobile device with soft USB function.
Background technology
The USB function almost is the indispensable function of all handheld mobile devices.Particularly along with the development of technology, the raising of chip processing speed, a lot of baseband chips are spreadtrum SC6600D for example, grace intelligence Pu PNX4904 etc. use GPIO (General Purpose Input/Output, general I/O, hereinafter to be referred as GPIO) simulate the function that realizes USB, this function is called as soft USB function.Adopt this technology to make hand-held mobile terminal equipment save the dsp chip of special-purpose processing USB function, saved the cost of equipment greatly.But because default special-purpose DSP, the GPIO that is used for simulating the baseband chip of USB directly links to each other with the usb data line that tail is inserted, and causes static to be crosstalked on the usb data line in electrostatic test easily, causes deadlock or restarts.Effectively protect as this weakness not, will cause this function normally to use soft USB function.Prior art is at this technical problem, only adopts the method that increases TVS (Transient Voltage Suppressor, Transient Voltage Suppressor is hereinafter to be referred as TVS) pipe usually, the injury that can not the static transient current of highly effective inhibition equipment be caused.
Summary of the invention
In order to overcome above-mentioned technological deficiency, the utility model provides a kind of antistatic handheld mobile device with soft USB function.
Design of the present utility model is: have the antistatic handheld mobile device of soft USB function, comprise that baseband chip and I/O tail are slotting, baseband chip is inserted by usb data line and I/O tail and is linked to each other, and it is characterized in that: the usb data line is managed ground connection by TVS.
The parasitic capacitance appearance value scope of TVS pipe is 0-5pf.
The usb data line is managed ground connection in the I/O exit by TVS.
Described baseband chip adopts grace intelligence Pu PNX4904 or spreadtrum SC6600D, and described TVS pipe adopts the TVS pipe PESD5V0U1BL of bipolarity ultra-low capacitance.
The resistance that is used for impedance of connecting on the soft usb data line is characterized in that: the resistance of build-out resistor is increased to [100 Europe, 200 Europe] interval interior arbitrary value.
Described handheld mobile device is not when using the USB function, and the state of GPIO is set to output.
Described antistatic handheld mobile device with soft USB function also comprises shell, and it is characterized in that: the shell seam is tight, and the scope of seam is within 1mm.
Described antistatic handheld mobile device with soft USB function is characterized in that: the slit around the LCD, use the conducting foam shutoff.
Described antistatic handheld mobile device with soft USB function also comprises the shell that has the metal part, it is characterized in that: the metal partial earthing of shell.
The antistatic handheld mobile device that the utility model provides with soft USB function, transfer to the static release way the shortest by increasing TVS pipe, adjustment TVS pipe position and housing designs on the one hand, conduct static, setting, the soft usb data line build-out resistor resistance of increase by change GPIO possibility occurs to prevent static on the other hand, effectively overcome static to the influence of usb data line, down to the situation that causes crashing, restarting.
Below, describe in detail according to the details and the working condition that the utility model proposes method in conjunction with the accompanying drawings and embodiments.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
Because chip adopts COMS technology, input impedance is very high, and outside disturbance is easy to chip is exerted an influence.On the other hand, according to up-to-date CTA (China Type Approvalcertification test procedure, China's model permission testing process) two data wire DP (Differential Plus of testing standard USB, the difference positive pole, hereinafter to be referred as DP), DM (Differential Minus, the difference negative pole, hereinafter to be referred as, DM) must be kept perfectly with charging wire, cause when using charging wire to carry out the electrostatic discharge testing experiment, static is coupled to data wire DP by ground wire bleed off loop, on the DM, thereby have influence on the operate as normal sequential of baseband chip, cause and crash or restart.By soft USB electrostatic problem directly cause this function can't normal use.
Among the utility model embodiment, the grace intelligence Pu PNX4904 chip that is adopted is integrated base band, mixed signal, power management and a module such as radio-frequency (RF) transceiver.Based on this module, carry out suitable expansion and can realize functions such as mobile communication function, power management function, LCD Presentation Function, camera function, broadcast MP3/MP4, be single-chip mobile phone scheme truly.Because grace intelligence Pu PNX4904 chip is the integration USB function not,, then need to use two GPIO of software function control to simulate the sequential that realizes usb communication if realize the USB function.
Fig. 1 is the structural representation of present embodiment, and baseband chip grace intelligence Pu PNX4904 inserts by data wire DP, DM with the I/O tail and links to each other as shown in the figure.At IO mouth place, the data wire DP of USB, DM manages ground connection by TVS.Because the transfer of data of USB to the restriction of the appearance value on the transmission line, if excessive to the appearance value with reference to ground under high-speed transfer, then can cause rising and fall time elongated, cause sequential not match, thereby cause the failure of communication.The parasitic capacitance appearance value range of choice of TVS pipe can satisfy the rate request of USB2.0 agreement, is selected the TVS pipe of the bipolarity ultra-low capacitance of grace intelligence Pu company at [0-5pf] for use in the present embodiment, the appearance value is 2.9pf.In addition, the TVS pipe is placed on IO mouth place, the static of being come by the charging wire coupling can be imported to reference in the ground with shortest path, can not impact baseband chip again.
As shown in the figure, be in series with two resistance that are used for impedance matching on the soft usb data line.This resistance resistance in actual applications is all 33 ohm, is used for the impedance matching of transmission line, reduces on the signal downward overshoot.In embodiments of the present invention, increase this two resistances, the resistance size is by the effect decision of transmission speed and the level threshold and the electrostatic storage deflection (ESD) test of usb protocol, owing to be used for simulating the clock decision by baseband chip of sequential that the GPIO of USB just changes, this speed can be very not fast and the level threshold scope agreement regulation is very wide.All desirable between 100-200 ohm through the verification experimental verification resistance, and the preventive effect in the static discharge experiment is obvious.
Baseband chip is made by CMOS technology, and input impedance is very high, and CMOS is voltage control, and small change in voltage will make chip produce misoperation.And in the static discharge process, if GPIO is configured to import, static is fatal to the injury of this GPIO, directly causes shutdown.Two GPIO that therefore will be used to simulate the USB function when soft USB function is obsolete are configured to output.Configuration prevents electrostatic discharge capacity to strengthen to some extent down like this.
The compactness of considering structure need be carried out necessary improvement design to casing structure to the tremendous influence in the electrostatic discharge testing.At first guarantee the tight type of casing, particularly LCD slit all around, need tight with the foam pad.Secondly for the casing that Metal decorative part is arranged, need effectively dredge metalwork, effectively way is that below with Metal decorative part links to each other with ground with conducting foam, makes static that a release way the shortest be arranged, and does not cause the unusual appearance that can't follow the tracks of and can not crosstalk in complete machine.
Provided by the inventionly carried out electrostatic storage deflection (ESD) test at non-antistatic handheld mobile device and antistatic handheld mobile device with soft USB function, experimental situation requires to build according to standard GB/T17626.2, and tests by this standard.Test result contact+/-8KV, air+/-15KV all passes through.
More than be that described baseband chip with antistatic handheld mobile device of soft USB function changes and makes spreadtrum SC6600D and also can reach same electrostatic defending protection effect.
Claims (9)
1. the antistatic handheld mobile device that has soft USB function comprises that baseband chip and I/O tail are slotting, and baseband chip is inserted by usb data line and I/O tail and linked to each other, and it is characterized in that: the usb data line is managed ground connection by TVS.
2. the antistatic handheld mobile device with soft USB function according to claim 1 is characterized in that: the parasitic capacitance appearance value scope of TVS pipe is 0-5pf.
3. the antistatic handheld mobile device with soft USB function according to claim 1, it is characterized in that: the usb data line is managed ground connection in the I/O exit by TVS.
4. the antistatic handheld mobile device with soft USB function according to claim 1 is characterized in that: described baseband chip adopts grace intelligence Pu PNX4904 or spreadtrum SC6600D, and described TVS pipe adopts the TVS pipe PESD5V0U1BL of bipolarity ultra-low capacitance.
5. according to claim 1,2,3 or 4 described antistatic handheld mobile devices with soft USB function, also comprise the resistance that is used for impedance of connecting on the soft usb data line, it is characterized in that: the resistance of build-out resistor is increased to [100 Europe, 200 Europe] interval interior arbitrary value.
6. according to claim 1,2,3 or 4 described antistatic handheld mobile devices with soft USB function, it is characterized in that: described handheld mobile device is not when using the USB function, and the state of GPIO is set to output.
7. according to claim 1,2,3 or 4 described antistatic handheld mobile devices with soft USB function, also comprise shell, it is characterized in that: the shell seam is tight, and the scope of seam is within 1mm.
8. according to claim 1,2,3 or 4 described antistatic handheld mobile devices, it is characterized in that with soft USB function: the slit around the LCD, use the conducting foam shutoff.
9. according to claim 1,2,3 or 4 described antistatic handheld mobile devices, also comprise the shell that has the metal part, it is characterized in that: the metal partial earthing of shell with soft USB function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201563564U CN201323446Y (en) | 2008-12-01 | 2008-12-01 | Static-free handheld mobile device with soft USB function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201563564U CN201323446Y (en) | 2008-12-01 | 2008-12-01 | Static-free handheld mobile device with soft USB function |
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| CN201323446Y true CN201323446Y (en) | 2009-10-07 |
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| CNU2008201563564U Expired - Fee Related CN201323446Y (en) | 2008-12-01 | 2008-12-01 | Static-free handheld mobile device with soft USB function |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789984A (en) * | 2009-12-28 | 2010-07-28 | 宇龙计算机通信科技(深圳)有限公司 | SIM card interface circuit and mobile phone |
| CN106897241A (en) * | 2016-12-28 | 2017-06-27 | 深圳天珑无线科技有限公司 | A kind of usb circuit and mobile terminal being applied in mobile terminal |
| CN107317134A (en) * | 2017-06-30 | 2017-11-03 | 上海青橙实业有限公司 | USB attachment means, USB fabric and terminal |
| CN108430153A (en) * | 2018-03-09 | 2018-08-21 | 京东方科技集团股份有限公司 | A kind of data transmission link plate, display module and electronic equipment |
| CN109149540A (en) * | 2018-08-29 | 2019-01-04 | 出门问问信息科技有限公司 | A kind of esd protection circuit and electronic equipment |
| CN109890189A (en) * | 2019-02-18 | 2019-06-14 | 晶晨半导体（深圳）有限公司 | A kind of electrostatic protection method |
| CN111343781A (en) * | 2020-03-06 | 2020-06-26 | Oppo广东移动通信有限公司 | ESD event handling method, ESD event handling circuit and related products |
-
2008
- 2008-12-01 CN CNU2008201563564U patent/CN201323446Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789984A (en) * | 2009-12-28 | 2010-07-28 | 宇龙计算机通信科技(深圳)有限公司 | SIM card interface circuit and mobile phone |
| CN101789984B (en) * | 2009-12-28 | 2013-09-25 | 宇龙计算机通信科技(深圳)有限公司 | SIM card interface circuit and mobile phone |
| CN106897241A (en) * | 2016-12-28 | 2017-06-27 | 深圳天珑无线科技有限公司 | A kind of usb circuit and mobile terminal being applied in mobile terminal |
| CN107317134A (en) * | 2017-06-30 | 2017-11-03 | 上海青橙实业有限公司 | USB attachment means, USB fabric and terminal |
| CN108430153A (en) * | 2018-03-09 | 2018-08-21 | 京东方科技集团股份有限公司 | A kind of data transmission link plate, display module and electronic equipment |
| US11357100B2 (en) | 2018-03-09 | 2022-06-07 | Beijing Boe Optoelectronics Technology Co., Ltd. | Data transmission circuit board, mobile industry processor interface and device |
| CN109149540A (en) * | 2018-08-29 | 2019-01-04 | 出门问问信息科技有限公司 | A kind of esd protection circuit and electronic equipment |
| CN109890189A (en) * | 2019-02-18 | 2019-06-14 | 晶晨半导体（深圳）有限公司 | A kind of electrostatic protection method |
| CN111343781A (en) * | 2020-03-06 | 2020-06-26 | Oppo广东移动通信有限公司 | ESD event handling method, ESD event handling circuit and related products |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WINGTECH COMMUNICATIONS CO., LTD. Free format text: FORMER OWNER: WINGTECH GROUP LIMITED Effective date: 20120111 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120111 Address after: 314006, No. 777, Middle South Road, Nanhu District, Zhejiang, Jiaxing (Jiaxing science and technology city) Patentee after: Wingtech Communication Co., Ltd. Address before: 314006, Jiaxing, Zhejiang on the north side of South Central Road, two West Road Patentee before: Wingtech Group Limited |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091007 Termination date: 20131201 |