CN201893835U - Dual-mode mobile terminal with slave system forced power-off function - Google Patents
Dual-mode mobile terminal with slave system forced power-off function Download PDFInfo
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- CN201893835U CN201893835U CN2010206059966U CN201020605996U CN201893835U CN 201893835 U CN201893835 U CN 201893835U CN 2010206059966 U CN2010206059966 U CN 2010206059966U CN 201020605996 U CN201020605996 U CN 201020605996U CN 201893835 U CN201893835 U CN 201893835U
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- mobile terminal
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Abstract
The utility model discloses a dual-mode mobile terminal with a slave system forced power-off function, which comprises a master system, a slave system and a NPN triode, wherein the master system comprises a general purpose input/output (GPIO) pin and the slave system comprises a PS_HOLD pin. The GPIO pin of the master system is connected with the base of the triode, the PS_HOLD pin is connected with the collector of the triode through a current-limiting resistance and the emitter of the triode is grounded. The dual-mode mobile terminal with the slave system forced power-off function has the advantages that the reliable power-off of the slave system in the dual-mode mobile terminal can be realized at very low cost, the abnormal situation that the slave system cannot be powered off is avoided and the reliability of the entire system is improved.
Description
Technical field
The utility model relates to cell phone apparatus, and particularly a kind of have from the mode mobile terminal of system's forced shutdown function.
Background technology
Usually bimodulus refers to different mobile telephone systems, as GSM, AMPS, TDMA, CDMA or the like.So bimodulus is exactly to support two or more mobile telephone system specifications, as GSM add satellite phone, GSM adds AMPS.Bimodulus is meant the employed frequency of system, as 900MHz, 1800MHz, 1900MHz.The GSM double frequency is exactly two kinds of frequencies of supporting homologous ray, as 900/1800MHz.GSM three just supports 900/1800/1900MHz frequently.
So-called " bimodulus " is exactly to be operated under two network schemers, these two mode of operations are exactly GSM network and cdma network, so-called " GSM/CDMA dual-mode handset " just is meant that mobile phone can support GSM and these two network communications technologys of CDMA simultaneously, it can be according to environment, the needs of communications cost or practical operation therefrom make a choice, which network technology more can play a role, just allow mobile phone switch to the work of going down of which kind of pattern, if in one mode, mobile communication is of low quality or other bad communication phenomenons occur, can freely forward on the another one network schemer and work, in fact it is exactly the use flexibility that has strengthened mobile phone, and improves the stability of communication greatly.
In the area that some cellphone subscribers relatively concentrate, especially suitable use dual-mode handset, because dual-mode handset can switch between GSM network and cdma network neatly, it is continuous to remain network, and can receive the signal of heterogeneous networks simultaneously, and then the signal that receives is handled respectively, noise signal is filtered, outstanding voice signal is enjoyed thereby obtain high-quality voice.In addition, dual-mode handset adopts broadband technology, support call transfer, Call Waiting, tripartite talk, caller ID display, short message, voice mail, the multiple function of automatic roaming.
Traditional technical scheme is to give from the machine open/close signal pins of system by main system to send out a switching on and shutting down signal (low level is effective) or order the shutdown of controlling from system by sending UART from system closedown.This method when following two kinds of situations, can occur unusual usually:
(1) when from system in case of system halt, off signal that can can't corresponding main system finally causes out of control from system;
(2) in the mobile phone shutdown process because of not during the off signal of corresponding main system, when starting shooting once more, causing being switched off on the contrary, thereby cause the asynchronous of master-slave system state from system from system busy, system occurs unusual.
In view of this, those skilled in the art provide a kind of and have had from the mode mobile terminal of system's forced shutdown function at the problems referred to above.
The utility model content
The utility model provides a kind of to have from the mode mobile terminal of system's forced shutdown function, overcome the difficulty of prior art, can be enough extremely low cost is realized in the mode mobile terminal the reliable shutdown from system, avoid occurring to close the abnormal conditions of electricity, improve the reliability of machine system from system.
The utility model adopts following technical scheme:
The utility model provides a kind of to have from the mode mobile terminal of system's forced shutdown function, comprises main system, from system and a NPN type triode, and described main system comprises a GPIO pin, comprises a PS_HOLD pin from system; The GPIO pin of described main system connects the base stage of described triode, and described PS_HOLD pin connects the collector electrode of described triode, the grounded emitter of described triode by a current-limiting resistance.
Preferably, comprise that also the series connection of second resistance is arranged between the GPIO pin of described transistor base and described main system.
Preferably, also comprise the 3rd resistance, the one end connects the node between described transistor base and described second resistance, other end ground connection.
Owing to adopted above-mentioned technology, compared with prior art, of the present utility model have from the mode mobile terminal of system's forced shutdown function can enough extremely low costs realize the mode mobile terminal reliable shutdown from system, avoid occurring to close the abnormal conditions of electricity, improve the reliability of machine system from system.
Further specify the utility model below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is having from the circuit theory diagrams of the mode mobile terminal of system's forced shutdown function among the embodiment.
Embodiment
Introduce a kind of specific embodiment of the present utility model below by Fig. 1.
Embodiment 1
As shown in Figure 1, of the present utility model a kind ofly have from the mode mobile terminal of system's forced shutdown function, comprises main system, from system and a NPN type triode Q1, and described main system comprises a GPIO pin, comprises a PS_HOLD pin from system; The GPIO pin of described main system connects the base stage of described triode Q1, and described PS_HOLD pin connects the collector electrode of described triode Q1, the grounded emitter of described triode Q1 by a current-limiting resistance R1.
In actual the use, also comprise second resistance R 2 and the 3rd resistance R 3,2 series connection of described second resistance R are arranged between the GPIO pin of described triode Q1 base stage and described main system.One end of described the 3rd resistance R 3 connects the node between described triode Q1 base stage and described second resistance R 2, other end ground connection.
Relate in the utility model: GPIO (general I/O) or bus extender utilize industrial standard I2C, SMBus
TMOr SPI
TMInterface has been simplified the expansion of I/O mouth.When microcontroller or chipset do not have enough I/O ports, or when system need adopt far-end serial communication or control, the GPIO product can provide extra control and function for monitoring.
Of the present utility model have from the actual operating position of the mode mobile terminal of system's forced shutdown function as follows:
(1) hardware connects:
As shown in Figure 1, in actual the use, the GPIO xx of main system is connected to the base stage of Q1; The grounded emitter of Q1; The collector electrode of Q1 is connected to PS_HOLD pin from the power supply managing unit by a current-limiting resistance R1.
(2) implementation method:
In the needs positive closing during from system, make some GPIO xx (selection defaults to inner drop-down GPIO) output high level of main system Base Band Unit by software, through the NPN type triode Q1 (or reverse logic gate cell) of an outside oppositely after, PS_HOLD pin from the Power Management Unit of system is forced to drag down a period of time (2～3 seconds), thereby realize pass electric control from system.
(3) realize principle:
From the PS_HOLD pin of the power management chip of system is that power supply is kept the control pin, drags down this pin, can make from the power supply of system to stop.During from system boot or operate as normal, the GPIO xx of main system keeps default low level state; When needs during, this GPIO output high level 2～3 seconds from system's forced shutdown, at this moment, dragged down from the PS_HOLD pin of system end, realize from the electronic work in the pass of system.
In summary, owing to adopted above-mentioned technology, of the present utility model have from the mode mobile terminal of system's forced shutdown function can enough extremely low costs realize the mode mobile terminal reliable shutdown from system, avoid occurring to close the abnormal conditions of electricity, improve the reliability of machine system from system.
Above-described embodiment only is used to illustrate technological thought of the present utility model and characteristics, its purpose is to make those skilled in the art can understand content of the present utility model and implements according to this, can not only limit claim of the present utility model with present embodiment, be all equal variation or modifications of doing according to the spirit that the utility model disclosed, still drop in the claim of the present utility model.
Claims (3)
1. one kind has from the mode mobile terminal of system's forced shutdown function, it is characterized in that: comprise main system, from system and a NPN type triode, described main system comprises a GPIO pin, comprises a PS_HOLD pin from system; The GPIO pin of described main system connects the base stage of described triode, and described PS_HOLD pin connects the collector electrode of described triode, the grounded emitter of described triode by a current-limiting resistance.
2. as claimed in claim 1 have from the mode mobile terminal of system's forced shutdown function, it is characterized in that: comprise that also the series connection of second resistance is arranged between the GPIO pin of described transistor base and described main system.
3. as claimed in claim 2 have from the mode mobile terminal of system's forced shutdown function, it is characterized in that: also comprise the 3rd resistance, the one end connects the node between described transistor base and described second resistance, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206059966U CN201893835U (en) | 2010-11-12 | 2010-11-12 | Dual-mode mobile terminal with slave system forced power-off function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206059966U CN201893835U (en) | 2010-11-12 | 2010-11-12 | Dual-mode mobile terminal with slave system forced power-off function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201893835U true CN201893835U (en) | 2011-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206059966U Expired - Lifetime CN201893835U (en) | 2010-11-12 | 2010-11-12 | Dual-mode mobile terminal with slave system forced power-off function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932706A (en) * | 2019-11-19 | 2020-03-27 | 广东天波信息技术股份有限公司 | Control circuit for avoiding shutdown leakage current of intelligent hardware |
-
2010
- 2010-11-12 CN CN2010206059966U patent/CN201893835U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932706A (en) * | 2019-11-19 | 2020-03-27 | 广东天波信息技术股份有限公司 | Control circuit for avoiding shutdown leakage current of intelligent hardware |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110706 |
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| CX01 | Expiry of patent term |