CN105204601A - System automatic power-on circuit and method - Google Patents
System automatic power-on circuit and method Download PDFInfo
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- CN105204601A CN105204601A CN201510589767.7A CN201510589767A CN105204601A CN 105204601 A CN105204601 A CN 105204601A CN 201510589767 A CN201510589767 A CN 201510589767A CN 105204601 A CN105204601 A CN 105204601A
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Abstract
The invention discloses a system automatic power-on circuit and method. The circuit comprises a constant power generation unit, a pulse generation unit, a power supply management unit and a system CPU unit, wherein the input end of the constant power generation unit is connected with a power supply, the output end of the constant power generation unit is respectively connected with the pulse generation unit and the power supply management unit to supply power for the pulse generation unit and the power supply management unit; the pulse output end of the pulse generation unit is connected with the pulse input end of the power supply management unit; the output end of the power supply management unit is connected with the input end of the system CPU unit. The system automatic power-on circuit and method disclosed by the invention have the advantages that the circuit structure is simple, the cost is low, the pulses generated by the pulse generation unit are used for triggering a power supply management chip to realize the automatic power-on of the system, the stability is good, the compatibility is good, the development period is short and the circuit and method are suitable for various constant power supply devices.
Description
Technical field
The present invention relates to technical field of electronic equipment, be specifically related to a kind of system electrification automatic boot circuit and starting-up method thereof.
Background technology
At present electronic equipment, particularly in hand-held (consumption) electronic equipment such as mobile phone and dull and stereotyped apparatus such as computer, the start of equipment normally produces by the button pressed on equipment that a pulse signal starts.In order to design conveniently, corresponding power management chip is all using the necessary condition of the triggering of key pulse as system electrification.
But, when using the design of this kind of power management chip not need button to trigger the equipment or device that start, button trigger pip becomes the restraining factors in design on the contrary, if replacing power management chip, then the design of the power supply of whole system equals to make a new start, and causes larger design risk and affects product development progress.In this case, design the trigger circuit that reasonably power on and just become the highest selection of cost performance.
In addition in the handheld device, also have a kind of by plugging USB line to equipment charge or the mode making device power-up, but its essence does not still depart from portable set, its object is not that the operation of alternative button is designed to non-portable device, but in order to supplementing of improving that usb charge function does.
Therefore a kind of structure is simple, cost is low, the system electrification Auto Power On motor utilizing this power management chip to realize and starting-up method thereof urgently propose.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of system electrification automatic boot circuit and starting-up method thereof, this circuit structure is simple, cost is low, utilize impulse generating unit pulsing to carry out triggering voltage managing chip, thus the system that realizes powers on automatically, good stability, compatibility are good, construction cycle is short, is applicable to various normal electric supply arrangement.
In order to achieve the above object, technical scheme of the present invention is as follows:
A kind of system electrification automatic boot circuit, comprising: normal electric generating unit, impulse generating unit, Power Management Unit and system CPU unit; The input end of normal electric generating unit is connected with power supply, and the output terminal of normal electric generating unit is connected with Power Management Unit with impulse generating unit respectively, for impulse generating unit and Power Management Unit are powered; The pulse output end of impulse generating unit is connected with the pulse input end of Power Management Unit; The output terminal of Power Management Unit is connected with the input end of system CPU unit.
Tradition application Power Management Unit is on portable devices applied on normal electric supply arrangement by a kind of system electrification of the present invention automatic boot circuit, and make the cost of normal electric supply arrangement low, the construction cycle is short, is convenient to the research and development of product.
On the basis of technique scheme, also can do following improvement:
As preferred scheme, Power Management Unit is the chip or circuit that are started by trigger action.
Adopt above-mentioned preferred scheme, the scope of application is large.
As preferred scheme, impulse generating unit is electronic circuit reset chip.
Adopt above-mentioned preferred scheme, cost is low, output reaches.
As preferred scheme, Power Management Unit is connected by I2C bus with system CPU unit.
Adopt above-mentioned preferred scheme, signal transmission quick and precisely.
As preferred scheme, be also provided with on-off circuit between power supply and normal electric generating unit, the signal input port of on-off circuit is connected with system CPU unit; When on-off circuit does not receive the chopping signal of system CPU unit transmission, on-off circuit is channel status, and normal electric generating unit is communicated with power supply; When on-off circuit receives the chopping signal of system CPU unit transmission, on-off circuit is off state, and normal electric generating unit and power supply disconnect.
Adopt above-mentioned preferred scheme, this circuit of on-off circuit is more energy-conservation.
A kind of system electrification automatic power-on method, utilizes system electrification automatic boot circuit to start shooting, comprises the following steps:
(1) power supply powers to normal electric generating unit;
(2) normal electric generating unit generates suitable voltage and powers to impulse generating unit and Power Management Unit respectively;
(3) impulse generating unit is started working, production burst, sends to Power Management Unit;
(4) Power Management Unit receives pulse triggering signal, starts to start, and Power Management Unit triggering system CPU element powers on.
A kind of system electrification automatic power-on method of the present invention starting procedure is fast convenient.
As preferred scheme, in step (3), impulse generating unit is started working, and the pin of the pulse output end of impulse generating unit is first set to high level, then exports a low pulse at interval of a period of time, sends to Power Management Unit.
Adopt above-mentioned preferred scheme, guarantee Power Management Unit effectively can receive the pulse that impulse generating unit sends.
As preferred scheme, in step (3), the time interval that the pulse output end of impulse generating unit exports low pulse can regulate.
Adopt above-mentioned preferred scheme, be convenient to the time regulating start.
As preferred scheme, step (4) comprises following sub-step:
(4.1) Power Management Unit receives pulse triggering signal, and Power Management Unit marks inner register flag bit simultaneously, and it is impulse generating unit that mark starts auto-trigger source;
(4.2) Power Management Unit control system CPU element powers on;
(4.3) system CPU unit powers on successfully, and system CPU unit reads the internal register zone bit of Power Management Unit, judges whether this zone bit exists mark;
If there is mark, then the action that powers on of system CPU unit be Power Management Unit trigger, system CPU unit subsequently at once shielded power supply administrative unit continue send trigger pip;
If not mark, then the action that powers on of system CPU unit is triggered by the electrification circuit beyond Power Management Unit.
Adopt above-mentioned preferred scheme, the trigger pip that shielded power supply administrative unit is sent here after system CPU unit successfully powers on, the work that the system of guarantee subsequently can be stable.
As preferred scheme, system electrification automatic power-on method also comprises step (5):
(5) system CPU unit powers on successfully, and system CPU unit sends chopping signal to on-off circuit, and on-off circuit is off state subsequently, and normal electric generating unit and power supply disconnect.
Adopt above-mentioned preferred scheme, normal electric generating unit and power supply power on successfully at system CPU unit and disconnect, and do not waste electric energy, more environmental protection.
Accompanying drawing explanation
One of structural representation of the system electrification automatic boot circuit that Fig. 1 provides for the embodiment of the present invention.
The circuit diagram of the system electrification automatic boot circuit that Fig. 2 provides for the embodiment of the present invention.
The structural representation two of the system electrification automatic boot circuit that Fig. 3 provides for the embodiment of the present invention.
Wherein: 1 normal electric generating unit, 2 impulse generating unit, 3 Power Management Unit, 4 system CPU unit, 5 power supplys, 6 on-off circuits.
Embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
In order to reach object of the present invention, in the embodiment of a kind of system electrification automatic boot circuit of the present invention and starting-up method thereof,
As illustrated in fig. 1 and 2, a kind of system electrification automatic boot circuit, comprising: normal electric generating unit 1, impulse generating unit 2, Power Management Unit 3 and system CPU unit 4; The input end of normal electric generating unit 1 is connected with power supply 5, and the output terminal of normal electric generating unit 1 is connected with Power Management Unit 3 with impulse generating unit 2 respectively, for impulse generating unit 2 and Power Management Unit 3 are powered; The pulse output end of impulse generating unit 2 is connected with the pulse input end of Power Management Unit 3; The output terminal of Power Management Unit 3 is connected with the input end of system CPU unit 4 by I2C bus.
In the present embodiment, Power Management Unit 3 is the chip started by trigger action.Certainly, Power Management Unit 3 also can for the circuit started by trigger action.
Impulse generating unit 2 is electronic circuit reset chip.
A kind of system electrification automatic power-on method, utilizes system electrification automatic boot circuit to start shooting, comprises the following steps:
(1) power supply 5 powers to normal electric generating unit 1;
(2) normal electric generating unit 1 generates suitable voltage and powers to impulse generating unit 2 and Power Management Unit 3 respectively;
(3) impulse generating unit 2 is started working, and the pin of the pulse output end of impulse generating unit 2 is first set to high level, then exports the low pulse of an a few tens of milliseconds every 1 second, sends to Power Management Unit 3;
(4.1) Power Management Unit 3 receives pulse triggering signal, and Power Management Unit 3 marks inner register flag bit simultaneously, and it is impulse generating unit 2 that mark starts auto-trigger source;
(4.2) Power Management Unit 3 control system CPU element 4 powers on;
(4.3) system CPU unit 4 powers on successfully, and system CPU unit 4 reads the internal register zone bit of Power Management Unit 3, judges whether this zone bit exists mark;
If there is mark, then the action that powers on of system CPU unit 4 is that Power Management Unit 3 triggers, the trigger pip of the system CPU unit 4 lasting transmission of shielded power supply administrative unit 3 at once subsequently, the inside power up interrupt of powered-down administrative unit 3 is enable at once subsequently for system CPU unit 4, makes Power Management Unit 3 no longer send look-at-me to system CPU unit 4 after receiving the lasting low pulse of impulse generating unit 2;
If not mark, then the action that powers on of system CPU unit 4 is triggered by the electrification circuit beyond Power Management Unit 3.
A kind of system electrification automatic boot circuit of the present invention and starting-up method thereof, Power Management Unit 3 is when low pulse input signal being detected, think the action that one-touch is pressed, then open internal circuit, and exporting each several part circuit after the voltage feed system of each road according to the default value that powers on, Power Management Unit 3 can arrange internal register zone bit and mark the action starting self is simultaneously pulse triggering source.After system CPU unit 4 powers on, the zone bit that system CPU unit 4 reads Power Management Unit 3 by I2C bus is trigger action action but not other actions such as timer to know this boot action, therefore system CPU unit 4 enters normal electrifying startup state, start operation system of software, open each functional block in hardware system.Meanwhile, mask the trigger pip that Power Management Unit 3 is sent here after system CPU unit 4 powers on, wake-up interrupts, make system no longer accept " button " action.Achieve the safe and reliable power up utilizing the Power Management Unit 3 in handheld device to realize normal electric supply arrangement smoothly.
A kind of system electrification automatic boot circuit of the present invention utilizes simple electronic circuit reset chip to simulate " button " and triggers, and achieve the triggering to Power Management Unit 3, thus realize start, cost is low, and compatible and good stability, system reliability is high.Meanwhile, the input utilizing software masking to fall periodic follow-up pulse triggers, and ensure that compatibility and the good stability of the hardware and software of normal electric supply arrangement.
Tradition application Power Management Unit 3 be on portable devices applied on normal electric supply arrangement, make the cost of normal electric supply arrangement low, the construction cycle is short, is convenient to the research and development of product.Without under the prerequisite of creative thinking, be difficult to expect utilizing this Power Management Unit 3 to be applied on normal electric supply arrangement.Meanwhile, by regulating normal electric input block 1 can be adapted to the input of different range voltage, and effectively can export the voltage being applicable to impulse generating unit 2 and Power Management Unit 3 work.
In order to optimize implementation result of the present invention further, in other embodiment, all the other feature technologies are identical, and difference is, in step (3), the time interval that the pulse output end of impulse generating unit exports low pulse can regulate.
Adopt above-mentioned preferred scheme, be convenient to the time regulating start.
As shown in Figure 3, in order to optimize implementation result of the present invention further, in other embodiment, all the other feature technologies are identical, difference is, is also provided with on-off circuit 6 between power supply 5 and normal electric generating unit 1, and the signal input port of on-off circuit 6 is connected with system CPU unit 4; When on-off circuit 6 does not receive the chopping signal of system CPU unit 4 transmission, on-off circuit is channel status, and normal electric generating unit 1 is communicated with power supply 5; When on-off circuit 6 receives the chopping signal of system CPU unit 4 transmission, on-off circuit 6 is off state, and normal electric generating unit 1 disconnects with power supply 5.
System electrification automatic power-on method also comprises step (5):
(5) system CPU unit powers on successfully, and system CPU unit 4 sends chopping signal to on-off circuit 6, and on-off circuit 6 is off state subsequently, and normal electric generating unit 1 disconnects with power supply 5.
Adopt above-mentioned preferred scheme, normal electric generating unit 1 and power supply 5 power on successfully at system CPU unit 4 and disconnect, and do not waste electric energy, more environmental protection.
Above is only the preferred embodiment of the present invention, and it should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (10)
1. a system electrification automatic boot circuit, is characterized in that, comprising: normal electric generating unit, impulse generating unit, Power Management Unit and system CPU unit;
The input end of described normal electric generating unit is connected with power supply, and the output terminal of described normal electric generating unit is connected with described Power Management Unit with described impulse generating unit respectively, for described impulse generating unit and described Power Management Unit are powered;
The pulse output end of described impulse generating unit is connected with the pulse input end of described Power Management Unit;
The output terminal of described Power Management Unit is connected with the input end of described system CPU unit.
2. system electrification automatic boot circuit according to claim 1, is characterized in that, described Power Management Unit is the chip or circuit that are started by trigger action.
3. system electrification automatic boot circuit according to claim 2, is characterized in that, described impulse generating unit is electronic circuit reset chip.
4. system electrification automatic boot circuit according to claim 3, is characterized in that, described Power Management Unit is connected by I2C bus with described system CPU unit.
5. the system electrification automatic boot circuit according to any one of claim 1-4, is characterized in that, is also provided with on-off circuit between described power supply and described normal electric generating unit, and the signal input port of described on-off circuit is connected with described system CPU unit;
When described on-off circuit does not receive the chopping signal of described system CPU unit transmission, described on-off circuit is channel status, and described normal electric generating unit is communicated with described power supply;
When described on-off circuit receives the chopping signal of described system CPU unit transmission, described on-off circuit is off state, and described normal electric generating unit and described power supply disconnect.
6. a system electrification automatic power-on method, is characterized in that, utilizes the system electrification automatic boot circuit described in any one of claim 1-5 to start shooting, comprises the following steps:
(1) power supply powers to normal electric generating unit;
(2) normal electric generating unit generates suitable voltage and powers to impulse generating unit and Power Management Unit respectively;
(3) described impulse generating unit is started working, production burst, sends to described Power Management Unit;
(4) described Power Management Unit receives pulse triggering signal, starts to start, and described Power Management Unit triggers described system CPU unit and powers on.
7. system electrification automatic power-on method according to claim 6, it is characterized in that, in described step (3), described impulse generating unit is started working, the pin of the pulse output end of described impulse generating unit is first set to high level, then export a low pulse at interval of a period of time, send to described Power Management Unit.
8. system electrification automatic power-on method according to claim 7, is characterized in that, in described step (3), the time interval that the pulse output end of described impulse generating unit exports low pulse can regulate.
9. system electrification automatic power-on method according to claim 8, is characterized in that, described step (4) comprises following sub-step:
(4.1) described Power Management Unit receives pulse triggering signal, and described Power Management Unit marks inner register flag bit simultaneously, and it is impulse generating unit that mark starts auto-trigger source;
(4.2) described Power Management Unit controls described system CPU unit and powers on;
(4.3) described system CPU unit powers on successfully, and described system CPU unit reads the internal register zone bit of described Power Management Unit, judges whether this zone bit exists mark;
If there is mark, then the action that powers on of described system CPU unit is that described Power Management Unit triggers, and described system CPU unit shields the trigger pip that described Power Management Unit continues to send subsequently at once;
If not mark, then the action that powers on of described system CPU unit is triggered by the electrification circuit beyond described Power Management Unit.
10. the system electrification automatic power-on method according to any one of claim 6-9, is characterized in that, described system electrification automatic power-on method also comprises step (5):
(5) described system CPU unit powers on successfully, and described system CPU unit sends chopping signal to on-off circuit, and described on-off circuit is off state subsequently, and described normal electric generating unit and described power supply disconnect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510589767.7A CN105204601B (en) | 2015-09-16 | 2015-09-16 | A kind of system electrification automatic boot circuit and its starting-up method |
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| CN201510589767.7A CN105204601B (en) | 2015-09-16 | 2015-09-16 | A kind of system electrification automatic boot circuit and its starting-up method |
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| CN105204601A true CN105204601A (en) | 2015-12-30 |
| CN105204601B CN105204601B (en) | 2019-04-12 |
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| CN110488725A (en) * | 2019-09-24 | 2019-11-22 | 天津七一二通信广播股份有限公司 | A kind of subway facility switching circuit |
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