CN101360145B - Mobile communication apparatus implementing function of earphone and JTAG - Google Patents
Mobile communication apparatus implementing function of earphone and JTAG Download PDFInfo
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- CN101360145B CN101360145B CN2008102006238A CN200810200623A CN101360145B CN 101360145 B CN101360145 B CN 101360145B CN 2008102006238 A CN2008102006238 A CN 2008102006238A CN 200810200623 A CN200810200623 A CN 200810200623A CN 101360145 B CN101360145 B CN 101360145B
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Abstract
The invention provides a mobile communication apparatus for realizing functions of earphones and JTAG, which is characterized in that: a plug circuit, an earphone circuit and a debugging circuit of JTAG are arranged on a circuit board of the mobile communication apparatus, the plug circuit is connected with the JTAG debugging circuit through an O-ohm impedance, and can also be connected with the earphone circuit through the O-ohm impedance. The mobile communication apparatus solves the problem that weld lines or more analog switches are needed when realizing functions of earphones and JTAG simultaneously in the prior art, and has advantages of stable performance and simple structure.
Description
Technical field
The present invention relates to field of mobile communication, especially relate to a kind of device for mobile communication of realizing earphone and JTAG function.
Background technology
JTAG (JOINT TEST ACTION GROUP) Chinese combined testing action group is a kind of international standard test protocol, is mainly used in the chip internal test.Most now high-grade device are all supported the JTAG agreement, as CPU, DSP, FPGA device etc.JTAG can carry out circuit collection, CPU read-write, fault simulation etc., realizes observation, emulation, the simulation of fault in the development process.The definition of the relevant pin of JTAG: TCK is the test clock input; TDI is test data input (data is by TDI pin input jtag interface); TDO is test data output (data are exported from jtag interface by the TDO pin); TMS is that test pattern is selected (TMS is used for being provided with jtag interface and is in certain specific test pattern); TRST is a test reset, input pin, and low level is effective.
By the observation of JTAG to the system signal state, can accurately search system's barrier, JTAG is a very practical testing standard.In order when cell phone system goes wrong, to use the JTAG function, need to increase the jtag interface circuit in the mobile phone circuit.
In order when mobile phone circuit breaks down, to use the JTAG debug function, need from the CPU pin, draw the jtag interface circuit.Because JTAG needs five interfaces, needs when in use the pad of five interface signals of JTAG by JTAG gone between out, be connected on the JTAG debugger, on the corresponding JTAG debugger welding lead is arranged also.
Yet general JTAG debugger all is a socket type, is unfavorable for bonding wire.Yin Xian length and diameter have very big influence to the speed of JTAG simultaneously, and also are very easy to short circuit, open circuit with what lead-in wire connected, are unfavorable for debugging.
In addition, also can use analog switch to switch, yet, if use analog switch to switch, increased the cost of analog switch again, be unfavorable for realizing the cost degradation of present device for mobile communication equipment.
Summary of the invention
The present invention is intended to solve the deficiencies in the prior art, provides a kind of and can realize earphone and JTAG function, the device for mobile communication of stable performance features simple structure simultaneously.
For addressing the above problem, the invention provides a kind of device for mobile communication of realizing earphone and JTAG function, it is characterized in that: the debug circuit that has tail plug-in road, head circuit and JTAG on the circuit board of device for mobile communication, described tail plug-in road can be connected with the JTAG debug circuit by 0 ohm impedance, also can be connected with head circuit by 0 ohm impedance.
The present invention also has following feature: described device for mobile communication is a mobile phone, described 0 ohm impedance comprises 0 ohm of exclusion and 0 Ohmic resistance, impedance by 0 ohm, the TMS of described JTAG debug circuit links to each other with the global semaphore MIC_HP_IO that tail is inserted, TDO links to each other with the global semaphore EAR_R_IO that tail is inserted, TDI links to each other with the global semaphore EAR_L_IO on tail plug-in road, and TCK links to each other with the global semaphore EARDET_IO on tail plug-in road, and TRST links to each other with the global semaphore DGND_IO on tail plug-in road.JTAG five road signals link to each other with the circuit of CPU by tail plug-in road, and the EARDET that passes through 0 ohm impedance head circuit is connected with the global semaphore EARDET_IO on tail plug-in road, the EAR_R of head circuit is connected with the global semaphore EAR_R_IO on tail plug-in road, EAR_L is connected with the global semaphore EAR_L_IO on tail plug-in road, MIC_HP is connected with the global semaphore MIC_HP_IO on tail plug-in road, and GND is connected with the global semaphore DGND_IO on tail plug-in road.
By said method, can realize the debug function of JTAG by multiplexing its head circuit and JTAG debug circuit on the tail plug-in road of device for mobile communication.
Description of drawings
Below in conjunction with the drawings and the specific embodiments the present invention is further described.
Fig. 1 is the schematic diagram that five global semaphores on five signals of JTAG debug circuit and mobile phone tail plug-in road link to each other with 0 Ohmic resistance R627 by 0 ohm of exclusion RR602;
Fig. 2 is the schematic diagram that five global semaphores on five signals of head circuit and mobile phone tail plug-in road link to each other with 0 Ohmic resistance R626 by 0 ohm of exclusion RR601;
Fig. 3 is five global semaphore schematic diagrames on tail plug-in road and tail plug-in road.
Embodiment
See also Fig. 1 and shown in Figure 3, it is the schematic diagram that five global semaphores on five signals of JTAG debug circuit and mobile phone tail plug-in road link to each other with 0 Ohmic resistance R627 by 0 ohm of exclusion RR602.Wherein, EARDET_IO, EAR_R_IO, EAR_L_IO, MIC_HP_IO and DGND_IO are five global semaphores that link to each other with mobile phone tail plug-in road.In addition, on the device for mobile communication device, also have circuit board, it is provided with CPU.And in the debug circuit of JTAG, TCK is the test clock input; TDI is test data input (data is by TDI pin input jtag interface); TDO is test data output (data are exported from jtag interface by the TDO pin); TMS is that test pattern is selected (TMS is used for being provided with jtag interface and is in certain specific test pattern).When in 0 ohm of exclusion RR602 and the 0 Ohmic resistance R627 welding time, and this moment 0 ohm of exclusion RR601 and not welding of 0 Ohmic resistance R626, five road signal TDO of JTAG link to each other with the global semaphore EAR_R_IO on tail plug-in road, TDI links to each other with the global semaphore EAR_L_IO on tail plug-in road, TCK links to each other with the global semaphore EARDET_IO on tail plug-in road, TRST links to each other with the global semaphore DGND_IO on tail plug-in road, TMS links to each other with the global semaphore MIC_HP_IO on tail plug-in road, and then JTAG five road signals link to each other with the circuit of CPU by tail plug-in road.At this moment, mobile phone tail plug-in road can be directly connected on the JTAG debugger, has realized being connected of cell phone mainboard and JTAG debugger, thereby can carry out the debug function of JTAG.
See also Fig. 2 and shown in Figure 3, it is the schematic diagram that five global semaphores on five signals of head circuit and mobile phone tail plug-in road link to each other with 0 Ohmic resistance R626 by 0 ohm of exclusion RR601.Wherein, EARDET is the detection signal that earphone inserts, and MIC_HP is Mike's signal of earphone, and EAR_R is the right-channel signals of earphone, and EAR_L is the left channel signals of earphone, and GND is the earth signal of earphone.In addition, on the device for mobile communication device, also have circuit board, it is provided with CPU.When in 0 ohm of exclusion RR601 and the 0 Ohmic resistance R626 welding time, and this moment 0 ohm of exclusion RR602 and not welding of 0 Ohmic resistance R627, EARDET is connected with the global semaphore EARDET_IO on tail plug-in road, EAR_R is connected with the global semaphore EAR_R_IO on tail plug-in road, EAR_L is connected with the global semaphore EAR_L_IO on tail plug-in road, MIC_HP is connected with the global semaphore MIC_HP_IO on tail plug-in road, GND is connected with the global semaphore DGND_IO on tail plug-in road, earphone is communicated with cpu circuit by tail plug-in road, ear-phone function can use, and the JTAG debug function can not be used.
Comprehensively above-mentioned, the present invention has finished inventor's goal of the invention, and the device for mobile communication of realization earphone provided by the invention and JTAG function can be realized earphone and JTAG function simultaneously, need not bonding wire, so its stable performance does not need external analog switch, its features simple structure in addition yet.
Claims (5)
1. device for mobile communication of realizing earphone and JTAG function, it is characterized in that: the debug circuit that has tail plug-in road, head circuit and JTAG on the circuit board of device for mobile communication, described tail plug-in road can be connected with the JTAG debug circuit by 0 ohm impedance, also can be connected with head circuit by 0 ohm impedance.
2. the device for mobile communication of realization earphone as claimed in claim 1 and JTAG function is characterized in that: described device for mobile communication is a mobile phone.
3. the device for mobile communication of realization earphone as claimed in claim 1 and JTAG function is characterized in that: described 0 ohm impedance comprises 0 ohm of exclusion and 0 Ohmic resistance.
4. the device for mobile communication of realization earphone as claimed in claim 1 and JTAG function, it is characterized in that: by 0 ohm impedance, the TMS of described JTAG debug circuit links to each other with the global semaphore MIC_HP_IO that tail is inserted, TDO links to each other with the global semaphore EAR_R_IO that tail is inserted, TDI links to each other with the global semaphore EAR_L_IO on tail plug-in road, TCK links to each other with the global semaphore EARDET_IO on tail plug-in road, and TRST links to each other with the global semaphore DGND_IO on tail plug-in road.
5. the device for mobile communication of realization earphone as claimed in claim 1 and JTAG function, it is characterized in that: by described 0 ohm impedance, the EARDET of head circuit is connected with the global semaphore EARDET_IO on tail plug-in road, the EAR_R of head circuit is connected with the global semaphore EAR_R_IO on tail plug-in road, EAR_L is connected with the global semaphore EAR_L_IO on tail plug-in road, MIC_HP is connected with the global semaphore MIC_HP_IO on tail plug-in road, and GND is connected with the global semaphore DGND_IO on tail plug-in road.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102006238A CN101360145B (en) | 2008-09-27 | 2008-09-27 | Mobile communication apparatus implementing function of earphone and JTAG |
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| CN2008102006238A CN101360145B (en) | 2008-09-27 | 2008-09-27 | Mobile communication apparatus implementing function of earphone and JTAG |
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| CN101360145A CN101360145A (en) | 2009-02-04 |
| CN101360145B true CN101360145B (en) | 2010-12-15 |
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| CN101893685B (en) * | 2009-05-23 | 2013-12-25 | 深圳富泰宏精密工业有限公司 | Debugging device |
| CN103093990B (en) * | 2011-10-31 | 2015-06-03 | 成都信息工程学院 | Multiplex design circuit of systematic physical key |
| CN104484268A (en) * | 2014-11-21 | 2015-04-01 | 厦门美图移动科技有限公司 | Debugging method and mobile terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101102566A (en) * | 2007-06-25 | 2008-01-09 | 中兴通讯股份有限公司 | A design method and debugging method for mobile phone JTAG debugging interface signals |
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| CN101102566A (en) * | 2007-06-25 | 2008-01-09 | 中兴通讯股份有限公司 | A design method and debugging method for mobile phone JTAG debugging interface signals |
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