CN102164200A

CN102164200A - Mobile phone

Info

Publication number: CN102164200A
Application number: CN201110054395XA
Authority: CN
Inventors: 杨金华
Original assignee: Huizhou TCL Mobile Communication Co Ltd
Current assignee: Huizhou TCL Mobile Communication Co Ltd
Priority date: 2011-03-08
Filing date: 2011-03-08
Publication date: 2011-08-24

Abstract

The invention discloses a mobile phone which comprises a control chip, a first key, a second key, a first signal line and a second signal line, wherein the control chip comprises a first key scanning interface and a second key scanning interface; the first key scanning interface is correspondingly connected with the first signal line; the second key scanning interface is correspondingly connected with the second signal line; when the first key is pressed, the first key scanning interface is connected to a reference level through the first signal line; and when the second key is pressed, the second key scanning interface is connected to the reference level through the second signal line. Through the technical scheme provided by the invention, the area of the printed circuit board can be effectively reduced, and the cost is effectively saved.

Description

A kind of mobile phone

Technical field

The present invention relates to electronic technology field, particularly relate to a kind of mobile phone.

Background technology

In mobile phones design, volume is adjusted general of button needs two buttons, promptly increases volume key and reduces volume key.

Adjust the method for designing of button according to present volume, at least need 3 holding wires to control and increase volume key and reduce volume key, not only need capable signal but also need column signal, when button is pressed, send the control chip of an interrupt signal by a row key scan interface to mobile phone, control chip determines that by scanning two capable key scan interfaces which button is pressed after receiving this interrupt signal, and carries out the operation that volume enlarges or volume reduces according to the button of pressing.

Because prior art need be provided with 3 holding wires, and, need carry out the electrostatic defending design to each root holding wire, it needs 3 electrostatic protection devices (corresponding to 3 holding wires) at least, therefore, the volume of prior art is adjusted the key method for designing often needs to take bigger PCB (Printed Circuit Board, printed circuit board (PCB)) area, and the number of electrostatic protection device is more, can cause the increase of cost.

Therefore, needing badly provides a kind of mobile phone, to address the above problem.

Summary of the invention

The technical problem that the present invention mainly solves provides a kind of mobile phone, to address the above problem.

For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of mobile phone is provided, comprise control chip, first button, second button, first holding wire and secondary signal line, control chip comprises the first key scan interface and the second key scan interface, corresponding first holding wire that connects of the first key scan interface, the corresponding secondary signal line that connects of the second key scan interface, by first holding wire first key scan interface is connected to reference level when first button is pressed, by the secondary signal line the second key scan interface is connected to reference level when second button is pressed.

Wherein, produce first interrupt signal when the first key scan interface is connected to described reference level, control chip produces volume according to first interrupt signal and increases signal.

Wherein, produce second interrupt signal when the second key scan interface is connected to described reference level, control chip produces the volume down small-signal according to second interrupt signal.

Wherein, the first key scan interface and the second key scan interface are row key scan interface.

Wherein, first button and second button are arranged on the side of mobile phone.

Wherein, reference level is a ground level.

Wherein, mobile phone further comprises electrostatic protection device, and first holding wire and secondary signal line are connected to ground level through electrostatic protection device respectively.

The invention has the beneficial effects as follows: be different from prior art, disclosed mobile phone can obtain interrupt signal from the first key scan interface and the second key scan interface, thereby make the volume adjustment button of mobile phone only need use 2 signal line and 2 electrostatic protection devices, can effectively reduce the area of printed circuit board (PCB), effectively save cost.

Description of drawings

Fig. 1 is the electrical block diagram according to the mobile phone of first embodiment of the invention.

Embodiment

At first see also Fig. 1, Fig. 1 is the electrical block diagram according to the mobile phone of first embodiment of the invention.

As shown in Figure 1, disclosed mobile phone comprises control chip 101, first button 102, second button 103, first holding wire 104 and secondary signal line 105, control chip 101 comprises the first key scan interface 106 and the second key scan interface 107, the first key scan interface, 106 corresponding first holding wires 104 that connect, the second key scan interface, the 107 corresponding secondary signal lines 105 that connect, by first holding wire 104 the first key scan interface 106 is connected to reference voltage when first button 102 is pressed, by secondary signal line 105 the second key scan interface 107 is connected to reference voltage when second button 103 is pressed.

Wherein, first button 102 and second button 103 are mechanical key.When first button 102 was pressed, the first key scan interface 106 was connected to reference voltage, at this moment, produced the first key scan interface 106 of first interrupt signal to control chip 101, and control chip 101 produces volume according to this first interrupt signal and increases signal.Wherein, this volume increases signal may command audio output signal and increases, thereby makes broadcast sound volume increase.

And when second button 103 was pressed, the second key scan interface 107 was connected to reference voltage, at this moment, produced the second key scan interface 107 of second interrupt signal to control chip 101, and control chip 101 produces the volume down small-signal according to this second interrupt signal.Wherein, this volume down small-signal may command audio output signal reduces, thereby makes broadcast sound volume reduce.

Therefore, disclosed mobile phone can directly obtain interrupt signal from the first key scan interface and the second key scan interface.

It should be noted that as shown in Figure 1, reference level is preferably ground level, more than first interrupt signal that produced and second interrupt signal be low level and trigger.But reference level also can be other level, and the present invention does not do concrete qualification to this.In addition, in a preferred embodiment of the invention, first holding wire 104 is connected to ground level through electrostatic protection device respectively with secondary signal line 105, and electrostatic protection device can guarantee that first holding wire 104 is not subjected to electrostatic interference with secondary signal line 105.

In a preferred embodiment of the invention, control chip 101 can be preferably baseband chip, and it can be high performance flush bonding processor, and the first key scan interface 106 and the second key scan interface 107 are preferably the row key scan interface in the control chip 101.But also can utilize capable key scan interface or universal input/output interface to realize that the present invention does not limit this according to actual needs.

Wherein, the first above-mentioned button 102 and second button 103 are adjusted the side that button can be arranged on mobile phone as volume, when needs are adjusted the broadcast sound volume of mobile phone it are carried out push action to make things convenient for the user.

And in actual applications, the shell 110 of first button 102 and second button 103 is preferably ground connection.

Therefore, by above technical scheme, disclosed mobile phone can obtain interrupt signal from the first key scan interface and the second key scan interface, thereby make the volume adjustment button of mobile phone only need use 2 signal line, only need to use 2 electrostatic protection devices, can effectively reduce the area of printed circuit board (PCB), and effectively save cost.

Below only be embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.

Claims

1. mobile phone, described mobile phone comprises control chip, first button, second button, first holding wire and secondary signal line, described control chip comprises the first key scan interface and the second key scan interface, described first holding wire of the corresponding connection of the described first key scan interface, the described secondary signal line of the corresponding connection of the described second key scan interface, it is characterized in that, by described first holding wire described first key scan interface is connected to reference level when described first button is pressed, by described secondary signal line the described second key scan interface is connected to reference level when described second button is pressed.

2. mobile phone according to claim 1 is characterized in that, produces first interrupt signal when the described first key scan interface is connected to described reference level, and described control chip produces volume according to described first interrupt signal and increases signal.

3. mobile phone according to claim 2 is characterized in that, produces second interrupt signal when the described second key scan interface is connected to described reference level, and described control chip produces the volume down small-signal according to described second interrupt signal.

4. mobile phone according to claim 1 is characterized in that, described first key scan interface and the described second key scan interface are row key scan interface.

5. mobile phone according to claim 1 is characterized in that, described first button and described second button are arranged on the side of described mobile phone.

6. according to any described mobile phone of claim 1-5, it is characterized in that described reference level is a ground level.

7. mobile phone according to claim 6 is characterized in that described mobile phone further comprises electrostatic protection device, and described first holding wire and described secondary signal line are connected to described ground level through described electrostatic protection device respectively.