CN201378316Y - Universal input/output interface extension circuit and mobile terminal with same - Google Patents
Universal input/output interface extension circuit and mobile terminal with same Download PDFInfo
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- CN201378316Y CN201378316Y CN200920009336U CN200920009336U CN201378316Y CN 201378316 Y CN201378316 Y CN 201378316Y CN 200920009336 U CN200920009336 U CN 200920009336U CN 200920009336 U CN200920009336 U CN 200920009336U CN 201378316 Y CN201378316 Y CN 201378316Y
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- general input
- output interface
- chip
- extended chip
- expanded circuit
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Abstract
The utility model discloses a universal input/output interface extension circuit and a mobile terminal with same, and relates to the technical field of interface extension. The utility model is designed to provide a plurality of universal input/output interfaces, and solve the defect of the prior art that the number of universal input/output interfaces is not enough. The universal input/output interface extension circuit comprises a main chip; the main chip is provided with an extension port; the extension port is connected with an extension chip by a bus; the extension chip comprises a control unit; the control unit comprises at least two transmission ports; and the two transmission ports are correspondingly connected with at least two universal input/output interfaces one by one. The mobile terminal is provided with the universal input/output interface extension circuit. The utility model can be used for the extension of the universal input/output interfaces.
Description
Technical field
The utility model relates to interface expansion technique field, relates in particular to a kind of general input/output interface expanded circuit and has the portable terminal of this general input/output interface expanded circuit.
Background technology
Along with the development of mobile communication technology, the function of portable terminal has increased increasing application from strength to strength.As shown in Figure 1, these use major part all is by (the General Purpose Input Output of the general I/O on the master chip 1, GPIO) external unit of interface connection is realized, when the external unit that connects on the master chip 1 increases gradually, cause the general input/output interface in the master chip 1 not enough easily, particularly for the two standby schemes with two platforms, this problem is more outstanding.
Secondly, in portable terminal, keyboard is similar as the keypad function in one of important input equipment and the computing machine, is bringing into play the effect of main control signal input in the operation of portable terminal.The general keyboard matrix method that adopts when on portable terminal, realizing the keyboard expansion at present, promptly the keyboard number that in portable terminal, needs more for a long time, usually with the one-tenth matrix form arranged evenly of button.
As shown in Figure 2, in the keyboard matrix 2, button 3 all is installed at the infall of each bar horizontal line and vertical curve.Therefore as shown in Figure 2, keyboard matrix 2 is 8 * 8 matrix, has taken 16 general input/output interfaces of master chip 1, has obtained 64 buttons 3.But this application keyboard matrix comes the method for extended keyboard still to take more general input/output interface.For example, supposing needs 22 buttons, then will adopt 5 * 5 keyboard matrix at least, so this keyboard matrix just need take 10 general input/output interfaces of master chip, this causes the general input/output interface of master chip 1 not enough equally easily.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of general input/output interface expanded circuit, and more general input/output interface can be provided, and solves the not enough defective of general input/output interface in the prior art.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of general input/output interface expanded circuit, comprise master chip, described master chip has the expansion mouth, described expansion mouth is connected with extended chip by bus, described extended chip comprises control module, described control module has at least two transmit pories, and described at least two transmit pories are connected with at least two general input/output interfaces correspondingly.
Wherein, described control module comprises look-at-me generation module, and described look-at-me generation module generates look-at-me according to the state variation of described general input/output interface, and by described bus described look-at-me is sent to described master chip.
According to different application scenarios, described extended chip is general input/output interface extended chip or keyboard extended chip.
Further, described expansion mouth comprises internal integrate circuit bus interface.
Perhaps, described expansion mouth comprises that timing control unit and two general input/output interfaces, described timing control unit control described two general input/output interfaces with the simulated interior integrate circuit bus interface.
Particularly, described bus comprises data line, clock line, system reset line and look-at-me line.
And, in described data line, clock line and look-at-me line, be provided with pull-up resistor respectively.
The general input/output interface expanded circuit that the utility model provides, owing in the expansion mouth of described master chip, be connected with extended chip, described extended chip has at least two general input/output interfaces, by described extended chip, described general input/output interface expanded circuit can use less general input/output interface, expand more general input/output interface, thereby the utility model can provide more general input/output interface, the not enough defective of general input/output interface in the solution prior art.
Another technical matters to be solved in the utility model is to provide a kind of portable terminal, the general input/output interface expanded circuit of described portable terminal inside can provide more general input/output interface, solves the not enough defective of general input/output interface in the prior art.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of portable terminal, comprise general input/output interface expanded circuit, described general input/output interface expanded circuit comprises master chip, described master chip has the expansion mouth, described expansion mouth is connected with extended chip by bus, described extended chip comprises control module, and described control module has at least two transmit pories, and described at least two transmit pories are connected with at least two general input/output interfaces correspondingly.
Wherein, described extended chip is general input/output interface extended chip, is connected with external unit in described at least two general input/output interfaces of described general input/output interface extended chip.
Perhaps, described extended chip is the keyboard extended chip, be connected with signal wire in described at least two general input/output interfaces of described keyboard extended chip, described signal wire comprises horizontal signal lines and vertical signal wire, and described horizontal signal lines and vertical signal wire intersect to form keyboard matrix.
The portable terminal that the utility model provides, comprise general input/output interface expanded circuit in the described portable terminal, owing in the expansion mouth of described master chip, be connected with extended chip, described extended chip has at least two general input/output interfaces, by described extended chip, described general input/output interface expanded circuit can use less general input/output interface, expand more general input/output interface, thereby the utility model can provide more general input/output interface, the not enough defective of general input/output interface in the solution prior art.
Description of drawings
Fig. 1 is the structural representation of a kind of portable terminal in the prior art;
Fig. 2 is the structural representation of another kind of portable terminal in the prior art;
Fig. 3 is the structural representation of the general input/output interface expanded circuit of the utility model embodiment;
Fig. 4 is the structural representation set up look-at-me generation module in general input/output interface expanded circuit shown in Figure 3 after;
Fig. 5 is the structural representation of expansion mouth in the general input/output interface expanded circuit shown in Figure 3;
Fig. 6 is the detailed structure synoptic diagram of bus in the general input/output interface expanded circuit shown in Figure 3;
Fig. 7 is the structural representation of an embodiment of the utility model portable terminal;
Fig. 8 is the structural representation of another embodiment of the utility model portable terminal;
Fig. 9 is the example block diagram of portable terminal shown in Figure 8.
Embodiment
The utility model aims to provide a kind of general input/output interface expanded circuit and has the portable terminal of this circuit, and more general input/output interface can be provided, and solves the not enough defective of general input/output interface in the prior art.
Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.
As shown in Figure 3, a specific embodiment for the general input/output interface expanded circuit of the utility model, in the present embodiment, described general input/output interface expanded circuit comprises master chip 1, master chip 1 has expansion mouthfuls 11, and expansion mouthfuls 11 is connected with extended chip 4 by bus 5, and extended chip 4 comprises control module 41, control module 41 has at least two transmit pories 411, and at least two transmit pories 411 are connected with at least two general input/output interfaces 42 correspondingly.
Owing in the expansion mouth 11 of master chip 1, be connected with extended chip 4, extended chip 4 has at least two general input/output interfaces 411, by extended chip 4, described general input/output interface expanded circuit can use less general input/output interface, expand more general input/output interface, thereby the utility model can provide more general input/output interface, the not enough defective of general input/output interface in the solution prior art.
Particularly, extended chip 4 has unique address, and master chip 1 can be according to the control module 41 in this address visit extended chip 4, thereby reaches the purpose of at least two general input/output interfaces 42 of control by control module 41.Described at least two general input/output interfaces 42 both can be used as output interface, also can be used as input interface.
Wherein, as shown in Figure 4, control module 41 also comprises look-at-me generation module 412, when general input/output interface 42 during as input interface, state can change after it received data, as becoming low level by high level, look-at-me generation module 412 generates look-at-me according to the state variation of general input/output interface 42, and by bus 5 this look-at-me is sent to master chip 1.Then, master chip 1 can be made corresponding processing to this look-at-me.
In the present embodiment, expansion mouth 11 can be the internal integrate circuit bus interface on the master chip 1.Internal integrate circuit bus interface (Inter-Integrated Circuit, I2C interface) can be between central processing unit and controlled integrated chip, or carries out the two-way transmission of data between integrated chip and the integrated chip, and data transfer rate is higher.
But present embodiment is not limited thereto, when master chip 1 not tool can use internal integrate circuit bus interface the time, can use general input/output interface to come the simulated interior integrate circuit bus interface.For example, as shown in Figure 5, expansion mouth 11 comprises timing control unit 111 and two general input/output interfaces 112, and timing control unit 111 is controlled two general input/output interfaces 112 with the simulated interior integrate circuit bus interface, thereby plays the effect of internal integrate circuit bus interface.
Further, the bus in this enforcement 5 comprises data line 51, clock line 52, system reset line 53 and look-at-me line 54.Wherein, data line 51 is used for sending or receiving data; Clock line 52 is used for transmit clock signal, the transmission direction of clock signal control data and transmission time; System reset line 53 is used for the transmission system reset instruction; Look-at-me line 54 is used to receive the look-at-me that look-at-me generation module 412 produces, and this look-at-me is sent to master chip 1, so that 1 pair of this look-at-me of master chip is made corresponding processing.
And, in data line 51, clock line 52 and look-at-me line 54, being provided with pull-up resistor 55 respectively, pull-up resistor 55 can improve output level, and then improves the noise margin of master chip 1 output signal, the antijamming capability of enhancing signal.
In addition, according to different application scenarios, extended chip 4 is general input/output interface extended chip or keyboard extended chip.For example, in the time of need inserting external unit on extended chip 4, extended chip 4 selects for use general input/output interface extended chip comparatively suitable; And when needing extended keyboard, then extended chip 4 selects for use the keyboard extended chip comparatively suitable.
In sum, the general input/output interface expanded circuit of present embodiment, owing in the expansion mouth 11 of master chip 1, be connected with extended chip 4, extended chip 4 has at least two general input/output interfaces 411, by extended chip 4, described general input/output interface expanded circuit can use less general input/output interface, expand more general input/output interface, thereby the utility model can provide more general input/output interface, the not enough defective of general input/output interface in the solution prior art.
In addition, the utility model also provides a kind of portable terminal.Described portable terminal, comprise general input/output interface expanded circuit, described general input/output interface expanded circuit comprises master chip, described master chip has the expansion mouth, described expansion mouth is connected with extended chip by bus, described extended chip comprises control module, and described control module has at least two transmit pories, and described at least two transmit pories are connected with at least two general input/output interfaces correspondingly.
Owing in the expansion mouth of described master chip, be connected with extended chip, described extended chip has at least two general input/output interfaces, by described extended chip, described general input/output interface expanded circuit can use less general input/output interface, expand more general input/output interface, thereby the utility model can provide more general input/output interface, the not enough defective of general input/output interface in the solution prior art.
As shown in Figure 7, a specific embodiment for the utility model portable terminal, in the present embodiment, described portable terminal comprises general input/output interface expanded circuit, described general input/output interface expanded circuit comprises master chip 1, master chip 1 has expansion mouth 11, expansion mouthfuls 11 is connected with extended chip 4 by bus 5, extended chip 4 comprises control module 41, control module 41 has at least two transmit pories 411, and at least two transmit pories 411 are connected with at least two general input/output interfaces 42 correspondingly.
Wherein, extended chip 4 is general input/output interface extended chip, is connected with external unit 6 at least two general input/output interfaces 42 of general input/output interface extended chip.External unit 6 can be flashlamp, backlight etc.So just increase the ability of portable terminal control external unit, and then increased the function of portable terminal.
As shown in Figure 8, another specific embodiment for the utility model portable terminal, in the present embodiment, described portable terminal comprises general input/output interface expanded circuit, described general input/output interface expanded circuit comprises master chip 1, master chip 1 has expansion mouth 11, expansion mouthfuls 11 is connected with extended chip 4 by bus 5, extended chip 4 comprises control module 41, control module 41 has at least two transmit pories 411, and at least two transmit pories 411 are connected with at least two general input/output interfaces 42 correspondingly.
Wherein, extended chip 4 is the keyboard extended chip, is connected with signal wire at least two general input/output interfaces 42 of keyboard extended chip, and signal wire comprises horizontal signal lines and vertical signal wire, and horizontal signal lines and vertical signal wire intersect to form keyboard matrix 2.Like this, realized 5 * 5 keyboard matrix, and can also insert external unit in the remaining general input/output interface by the general input/output interface 42 on the extended chip 4.As shown in Figure 9, be the example block diagram of portable terminal in the present embodiment, by among the figure as can be known, can also ground connection in the remaining general input/output interface, perhaps unsettled.
In sum, above-mentioned two embodiment portable terminals, owing in the expansion mouth 11 of master chip 1, be connected with extended chip 4, extended chip 4 has at least two general input/output interfaces 411, by extended chip 4, described general input/output interface expanded circuit can use less general input/output interface, expand more general input/output interface, thereby the utility model can provide more general input/output interface, the not enough defective of general input/output interface in the solution prior art
The above; it only is embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the described protection domain of claim.
Claims (10)
1, a kind of general input/output interface expanded circuit, comprise master chip, described master chip has the expansion mouth, it is characterized in that, described expansion mouth is connected with extended chip by bus, described extended chip comprises control module, and described control module has at least two transmit pories, and described at least two transmit pories are connected with at least two general input/output interfaces correspondingly.
2, general input/output interface expanded circuit according to claim 1, it is characterized in that, described control module comprises look-at-me generation module, described look-at-me generation module generates look-at-me according to the state variation of described general input/output interface, and by described bus described look-at-me is sent to described master chip.
3, general input/output interface expanded circuit according to claim 1 and 2 is characterized in that, described extended chip is general input/output interface extended chip or keyboard extended chip.
4, general input/output interface expanded circuit according to claim 1 is characterized in that, described expansion mouth comprises internal integrate circuit bus interface.
5, general input/output interface expanded circuit according to claim 1, it is characterized in that, described expansion mouth comprises that timing control unit and two general input/output interfaces, described timing control unit control described two general input/output interfaces with the simulated interior integrate circuit bus interface.
6, general input/output interface expanded circuit according to claim 1 is characterized in that, described bus comprises data line, clock line, system reset line and look-at-me line.
7, general input/output interface expanded circuit according to claim 6 is characterized in that, is provided with pull-up resistor respectively in described data line, clock line and look-at-me line.
8, a kind of portable terminal, comprise general input/output interface expanded circuit, described general input/output interface expanded circuit comprises master chip, described master chip has the expansion mouth, it is characterized in that described expansion mouth is connected with extended chip by bus, described extended chip comprises control module, described control module has at least two transmit pories, and described at least two transmit pories are connected with at least two general input/output interfaces correspondingly.
9, portable terminal according to claim 8, it is characterized in that, described extended chip is general input/output interface extended chip, is connected with external unit in described at least two general input/output interfaces of described general input/output interface extended chip.
10, portable terminal according to claim 8, it is characterized in that, described extended chip is the keyboard extended chip, be connected with signal wire in described at least two general input/output interfaces of described keyboard extended chip, described signal wire comprises horizontal signal lines and vertical signal wire, and described horizontal signal lines and vertical signal wire intersect to form keyboard matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920009336U CN201378316Y (en) | 2009-03-19 | 2009-03-19 | Universal input/output interface extension circuit and mobile terminal with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920009336U CN201378316Y (en) | 2009-03-19 | 2009-03-19 | Universal input/output interface extension circuit and mobile terminal with same |
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| Publication Number | Publication Date |
|---|---|
| CN201378316Y true CN201378316Y (en) | 2010-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920009336U Expired - Fee Related CN201378316Y (en) | 2009-03-19 | 2009-03-19 | Universal input/output interface extension circuit and mobile terminal with same |
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| CN (1) | CN201378316Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268302A (en) * | 2013-04-19 | 2013-08-28 | 华为技术有限公司 | Interface expanding circuit, interface expanding connecting method and embedded system |
| CN105045746A (en) * | 2015-09-09 | 2015-11-11 | 四川九洲电器集团有限责任公司 | Interface expanding device |
| CN107957963A (en) * | 2016-10-18 | 2018-04-24 | 佛山市顺德区美的电热电器制造有限公司 | IO output ports expanded circuit and household electrical appliance |
-
2009
- 2009-03-19 CN CN200920009336U patent/CN201378316Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268302A (en) * | 2013-04-19 | 2013-08-28 | 华为技术有限公司 | Interface expanding circuit, interface expanding connecting method and embedded system |
| CN103268302B (en) * | 2013-04-19 | 2016-08-03 | 华为技术有限公司 | A kind of Interface Expanding circuit, Interface Expanding method of attachment and embedded system |
| CN105045746A (en) * | 2015-09-09 | 2015-11-11 | 四川九洲电器集团有限责任公司 | Interface expanding device |
| CN107957963A (en) * | 2016-10-18 | 2018-04-24 | 佛山市顺德区美的电热电器制造有限公司 | IO output ports expanded circuit and household electrical appliance |
| CN107957963B (en) * | 2016-10-18 | 2021-04-20 | 佛山市顺德区美的电热电器制造有限公司 | IO output port expanding circuit and household appliance |
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| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100106 Termination date: 20120319 |