CN202737832U

CN202737832U - Level jump reset IC design circuit

Info

Publication number: CN202737832U
Application number: CN 201220460903
Authority: CN
Inventors: 曾元清
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2012-09-12
Filing date: 2012-09-12
Publication date: 2013-02-13
Anticipated expiration: 2022-09-12

Abstract

The utility model discloses a level jump resetting IC design circuit, comprising a reset IC, a reset circuit, and a switching circuit. The reset circuit and the switching circuit are connected with signal input pins of the reset IC. The level jump resetting IC design circuit can make mobile phones effectively realize reset shutdown and restart, and make the mobile phones enter a Recovery mode. Reset pulse time can be set by a user according to requirement, so that the user can distinguish two different operations of reset shutdown and restart. When the mobile phones enter the Recovery mode, the switching circuit makes the reset circuit loss efficacy, so that the mobile phones can normally and effectively enter the Recovery mode.

Description

A kind of level saltus step IC design circuit that resets

Technical field

The utility model relates to a kind of level saltus step IC design circuit that resets, and is specifically related to a kind of circuit of realizing that mobile phone resets shutdown and restarts function and can enter the Recovery pattern.

Background technology

Current smart mobile phone is because the situation that user's frequent operation often can occur crashing, and at this moment the user usually can only pull up battery and makes mobile phone restart, and the intelligent mobile phone battery of internal battery pulls out to get off.Be to solve problems, the designer adopts built in hardware reset circuit on smart mobile phone, namely in the mobile phone deadlock situation by realizing the shutdown of mobile phone after by the power key long enough time and restarting.And for the user, when hope that yes is pressed power key always, realize the function that mobile phone resets first and shuts down and and then can start shooting again.Like this, whenever the user can both be by realizing shutdown or the function of restarting what use mobile phone by power key.

Usually, reset IC(such as the CAT871 of pulse output) become designer's first-selection, this type of IC can add peripheral circuit just can realize simultaneously long reach shutdown or restart and effectively distinguish by power key reset and the function of other operations, but because its pulse width time is lacked very much (2ms-80ms, time is that IC fixes, can not artificially arrange), namely the reset circuit out-of-service time is too short after the shutdown, and then the utmost point once more start in the short time behind the mobile phone shutdown when causing the user to reset, just can not effectively distinguishing when the user operates like this resets shuts down and restarts this two kinds of different operations; And this type of IC can not distinguish reset operation and other operations when not adding peripheral circuit, as enters Recovery pattern (namely recovering pattern) operation.And the IC that resets of level saltus step can only realize resetting shut-off function when not adding peripheral circuit usually, can not realize the function of restarting.

The utility model content

For overcoming the problem of the deficiencies in the prior art and existence, the utility model provides a kind of level saltus step IC design circuit that resets, this circuit utilizes the level saltus step IC that resets, and adds that simple peripheral circuit can make mobile phone effectively realize the function that resets shutdown, restarts and enter the Recovery pattern.

The utility model is achieved through the following technical solutions: a kind of level saltus step IC design circuit that resets comprises the IC that resets, reset circuit and switching circuit; The described IC of resetting has two signal input pin SR0, SR1 and a signal output pin RST at least, and signal output pin RST is according to the input signal output corresponding signal of signal input pin SR0 and signal input pin SR1; Described reset circuit is connected with the signal input pin SR0 of the IC that resets, makes the shutdown that resets of the signal output pin RST output correlation signal realization mobile phone of the IC that resets; Described switching circuit is connected with the signal input pin SR1 of the IC that resets, is used for the control reset circuit and is in reset effective status or the disarmed state that resets, and makes mobile phone realize the function of restarting and entering the Recovery pattern.

Further, described switching circuit comprises triode Q1 and diode D1, the emitter E of described triode Q1 is connected with ground, its base stage B is connected with voltage source V CC1 by pull-up resistor R1, its collector electrode C is connected with voltage source V CC2 by pull-up resistor R2, and its collector electrode C also is connected with the signal input pin SR1 of the IC that resets by resistance R 3; The positive pole of described diode D1 is connected with the base stage B of triode Q1, and its negative pole is connected with the button of mobile phone.The voltage of the voltage source V CC1 of described switching circuit disappears along with the resetting shutdown of mobile phone, and the voltage of the voltage source V CC2 of switching circuit then exists always, can not disappear along with the resetting shutdown of mobile phone.Described button is that volume down key or the volume of mobile phone adds key or photograph key, after mobile phone power-on powers on, is low level when described button is pressed, and then is high level when not pressing.

Further, described reset circuit comprises the power key PWR of mobile phone, the end ground connection of described power key PWR, and the other end is connected with the signal input pin SR0 of the IC that resets by current-limiting resistance R4 and also is connected with voltage source V CC4 by pull-up resistor R5.

Further, the described IC of resetting be RICOH R3200x series the level saltus step IC that resets; Described triode Q1 is NPN type triode.

Reset after the shutdown when reset circuit makes mobile phone, mobile phone shutdown causes the switching circuit output correlation signal to make reset circuit be in the disarmed state that resets, and continues to press the power key PWR in the reset circuit, realizes the function of restarting of mobile phone; Allow mobile phone enter the Recovery pattern, in the situation of mobile phone shutdown, pressing the button (such as volume down key VOL-) that is connected with switching circuit makes reset circuit be in the disarmed state that resets, and press the power key PWR in the reset circuit, detect power key PWR and whether volume down key VOL-presses simultaneously by software, be then to make mobile phone enter the Recovery pattern.

The utility model can make mobile phone effectively realize the function that resets shutdown, restarts and enter the Recovery pattern, its reset pulse time (i.e. shutdown is rear to the time between again starting shooting) can also artificially arrange, the user can be distinguished well reset shutdown and restart this two kinds of different operations, simultaneously, in the time will entering the Recovery pattern, utilize switching circuit that reset circuit was lost efficacy, when software detection is pressed simultaneously to volume down key VOL-and power key PWR, make it normally effectively enter the Recovery pattern thereby control mobile phone.

Description of drawings

Fig. 1 is the circuit theory schematic diagram of the utility model embodiment;

Fig. 2 is the workflow diagram that the utility model embodiment mobile phone resets shutdown and restarts;

Fig. 3 is that the utility model embodiment mobile phone enters the workflow diagram of Recovery pattern.

Embodiment

Understanding for the ease of those skilled in the art is described in further detail the utility model below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, a kind of level saltus step IC design circuit that resets comprises the IC that resets, reset circuit and switching circuit.The described IC of resetting be RICOH R3200x series the level saltus step IC that resets, the model of the IC that resets in the present embodiment is R3200K001B.Described reset circuit is connected with the signal input pin SR0 of the IC that resets, makes the shutdown that resets of the signal output pin RST output correlation signal realization mobile phone of the IC that resets; Described switching circuit is connected with the signal input pin SR1 of the IC that resets,, be used for the control reset circuit and be in reset effective status or the disarmed state that resets, make mobile phone realize the function of restarting and entering the Recovery pattern.The power supply input pin VDD of IC of resetting is connected with voltage source V CC3, and grounding pin GND ground connection is connected to capacitor C 1 between power supply input pin VDD and earth terminal GND; Another signal output pin of IC of resetting unsettled (indicating among Fig. 1).The DSR pin of IC of resetting is to select that pin---during DSR pin ground connection, the reset delay time is 7.5S the reset delay time (namely satisfying simultaneously reset condition to the time of output reset signal from signal input pin SRO and signal input pin SR1); When the DSR pin was connected with power supply input pin VDD, the reset delay time was 11.25S; In the present embodiment, the DSR pin is by resistance R 7 ground connection, and its reset delay time is 7.5S.The TEST pin of IC of resetting is the chip testing pin, is prescribed ground connection during the IC that resets work.

Described switching circuit comprises triode Q1 and diode D1, described triode Q1 is NPN type triode, the emitter E of this triode Q1 is connected with ground, its base stage B is connected with voltage source V CC1 by pull-up resistor R1, its collector electrode C is connected with voltage source V CC2 by pull-up resistor R2, and its collector electrode C also is connected with the signal input pin SR1 of the IC that resets by resistance R 3; The positive pole of described diode D1 is connected with the base stage B of triode Q1, and its negative pole is connected with the volume down key VOL-of mobile phone, and after mobile phone power-on powered on, described volume down key VOL-was low level when pressing, and then is high level when not pressing.The voltage of the voltage source V CC1 of switching circuit disappears along with the resetting shutdown of mobile phone, and the voltage of the voltage source V CC2 of switching circuit exists always, can not disappear along with the resetting shutdown of mobile phone.The negative pole that it is pointed out that the diode D1 in the switching circuit is not limited to be connected with the volume down key VOL-of mobile phone, also can add key with the volume of mobile phone or the photograph key is connected; Only with volume down key VOL-operation principle of the present utility model is described in the present embodiment.

Described reset circuit comprises the power key PWR of mobile phone, the end ground connection of this power key PWR, and the other end is connected with the signal input pin SR0 of the IC that resets by current-limiting resistance R4 and also is connected with voltage source V CC4 by pull-up resistor R5.

Below operation principle of the present utility model is further described.

After mobile phone power-on powered on, volume down key VOL-and power key PWR were high level in situation about not being pressed, be low level when being pressed.When volume down key VOL-was not pressed, volume down key VOL-was high level, diode D1 cut-off, and triode Q1 conducting, the level of its collector electrode C is dragged down, and the signal input pin SR1 of the IC that resets is in low level, and reset circuit is in the effective status that resets.At this moment, individual palpation power key PWR a period of time (about 7.5S), the signal output pin RST output high level of the IC that resets is realized the shutdown that resets of mobile phone.After mobile phone resets shutdown, the voltage source V CC1 of the base stage B of the triode Q1 of switching circuit disappears, triode Q1 turn-offs, the signal input pin SR1 of IC of resetting is existed by the voltage of voltage source V CC2(voltage source V CC2, VCC3, VCC4 always, do not disappear with mobile phone shutdown) on draw and be high level, reset circuit is in the disarmed state that resets.At this moment, continue not put according to power key PWR, mobile phone just enters the start rebooting status.So, longly realized just by power key PWR that mobile phone resets and restarted again the function of start after the shutdown that its workflow as shown in Figure 2.In addition, can adjust as required the reset pulse time (being to the time between again starting shooting behind the mobile phone shutdown), the resistance value that can change pull-up resistor R1 is adjusted the reset pulse time, allows the user distinguish well to reset shutdown to restart these two kinds different operations with starting shooting.

In the time will making mobile phone enter the Recovery pattern, in the situation of mobile phone shutdown, press first the longer power key PWR that presses of volume down key VOL-, then detect volume down key VOL-by related software and whether power key PWR presses simultaneously, be then to make it enter the Recovery pattern by the software control mobile phone.When volume down key VOL-is pressed, volume down key VOL-ground connection is low level, diode D1 conducting, the base stage B of triode Q1 is from diode D1 ground connection, the voltage at the base stage B place of triode Q1 is pulled low to about 0.05V, triode Q1 turn-offs, the signal input pin SR1 of IC of resetting is drawn on the voltage source V CC2 to be high level, this moment, reset circuit was in the disarmed state that resets, this duration is pressed power key PWR a period of time, and software detection is pressed simultaneously to volume down key VOL-and power key PWR, makes mobile phone enter smoothly the Recovery pattern, and the situation of the shutdown that can not occur resetting, its workflow is as shown in Figure 3.

Above-described embodiment is better implementation of the present utility model, is not to be to restriction of the present utility model, and under the prerequisite that does not break away from inventive concept of the present utility model, any apparent replacement is all within protection range of the present utility model.

Claims

1. level saltus step IC design circuit that resets is characterized in that, comprising:

The IC that resets has two signal input pin SR0, SR1 and a signal output pin RST at least, and signal output pin RST is according to the input signal output corresponding signal of signal input pin SR0 and signal input pin SR1;

Reset circuit is connected with the signal input pin SR0 of the described IC of resetting, makes the shutdown that resets of the signal output pin RST output correlation signal realization mobile phone of the IC that resets;

Switching circuit is connected with the signal input pin SR1 of the described IC of resetting, is used for the control reset circuit and is in reset effective status or the disarmed state that resets, and makes mobile phone realize the function of restarting and entering the Recovery pattern.

2. the level saltus step according to claim 1 IC design circuit that resets, it is characterized in that: described switching circuit comprises triode Q1 and diode D1, the emitter E of described triode Q1 is connected with ground, its base stage B is connected with voltage source V CC1 by pull-up resistor R1, its collector electrode C is connected with voltage source V CC2 by pull-up resistor R2, and its collector electrode C also is connected with the signal input pin SR1 of the IC that resets by resistance R 3; The positive pole of described diode D1 is connected with the base stage B of triode Q1, and its negative pole is connected with the button of mobile phone.

3. the level saltus step according to claim 2 IC design circuit that resets, it is characterized in that: the voltage of the voltage source V CC1 of described switching circuit disappears along with the resetting shutdown of mobile phone, the voltage of the voltage source V CC2 of switching circuit then exists always, can not disappear along with the resetting shutdown of mobile phone.

4. the level saltus step according to claim 2 IC design circuit that resets, it is characterized in that: described button is that volume down key or the volume of mobile phone adds key or photograph key.

5. the level saltus step according to claim 3 IC design circuit that resets, it is characterized in that: described reset circuit comprises the power key PWR of mobile phone, the end ground connection of described power key PWR, the other end are connected with the signal input pin SR0 of the IC that resets by current-limiting resistance R4 and also are connected with voltage source V CC4 by pull-up resistor R5.

6. each described level saltus step IC design circuit that resets according to claim 1-5 is characterized in that: the described IC of resetting is the level saltus step of the RICOH R3200x series IC that resets.

7. the level saltus step according to claim 6 IC design circuit that resets, it is characterized in that: described triode Q1 is NPN type triode.