CN215642599U - Automatic start-up circuit of intelligent module - Google Patents
Automatic start-up circuit of intelligent module Download PDFInfo
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- CN215642599U CN215642599U CN202122132367.7U CN202122132367U CN215642599U CN 215642599 U CN215642599 U CN 215642599U CN 202122132367 U CN202122132367 U CN 202122132367U CN 215642599 U CN215642599 U CN 215642599U
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Abstract
The utility model discloses an automatic starting circuit of an intelligent module, which comprises the intelligent module, a power supply and a reset chip. The power supply output end of the power supply is connected with the power supply input end of the reset chip and the battery voltage input end of the intelligent module at the same time; and the reset signal output end of the reset chip is connected with the power supply awakening end of the intelligent module. The utility model utilizes the reset chip to monitor the power supply output of the power supply to provide the reset signal for powering on and starting up the intelligent module, has simple circuit structure, simplifies the power-on automatic starting up process of the intelligent module and improves the use convenience of the intelligent module.
Description
Technical Field
The utility model relates to the field of intelligent modules, in particular to an automatic starting circuit of an intelligent module.
Background
At present, the application of intelligent modules is more and more extensive, such as intelligent home, security, intelligent POS machine and the like.
As shown in fig. 1, the booting method of the smart module generally uses two methods:
1. when the module is in the power-off state, the module is powered on by pulling down PWRKEY (power wake-up pin) for a period of time (usually within 2 seconds).
The method needs to manually pull down the PWRKEY signal or pull down the PWRKEY through a GPIO (serial input/output port), and the automatic power-on of the module cannot be realized.
2. If the intelligent module has a VBUS pin (5V power pin of USB), and the power-on function is supported. The VBUS can be connected with 5V for a period of time, and the intelligent module can be automatically started. And after the startup is successful, the voltage of the VBUS is removed.
The specific process is as follows:
when the product is in a power-off state or is being powered on, and the power-on success signal GPIO _ PowerOn is at a low level, the switch circuit 1 is turned on, and the switch circuit 2 is turned off.
When the product is in a starting state, the GPIO _ PowerOn outputs high level, the switch circuit 1 is disconnected, and the switch circuit 2 is connected.
After the product power supply is plugged in, the 5V voltage exists because the switch circuit 1 is conducted, and the intelligent module starts to be started.
When the intelligent module is started successfully, the GPIO _ PowerOn outputs high level, the switch circuit 1 is disconnected, and the switch circuit 2 is connected.
In the starting-up state, after the USB is inserted, the switch circuit 2 is switched on, and 5V has voltage, so that the USB right lifting process can be triggered, and the USB can be normally identified.
In the shutdown state, after the USB is inserted, the 5V power-off state cannot trigger the startup because the switch circuit 2 is off.
It can be seen that the first scheme does not implement automatic power-on and power-on. Although the second scheme realizes the automatic power-on starting, two switching circuits are needed to execute control, the actual circuit is complex, the operation is complex, and the starting cannot be triggered when the USB is inserted, so that the intelligent device is inconvenient to use.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: an automatic power-on circuit of an intelligent module simplifies the power-on automatic power-on process of the intelligent module and improves the use convenience of the intelligent module.
In order to solve the problems, the utility model adopts the following scheme:
an intelligent module automatic starting circuit comprises an intelligent module, a power supply and a reset chip;
the power supply output end of the power supply is simultaneously connected with the power supply input end of the reset chip and the battery voltage input end of the intelligent module;
and the reset signal output end of the reset chip is connected with the power supply awakening end of the intelligent module.
Furthermore, the device also comprises a current limiting resistor;
and the reset signal output end of the reset chip is connected with the power supply awakening end of the intelligent module through the current-limiting resistor.
Furthermore, the system also comprises a starting button;
one end of the start-up key is simultaneously connected with one end of the current-limiting resistor, which is far away from the reset chip, and the power supply awakening end of the intelligent module, and the other end of the start-up key is grounded.
Further, the device also comprises an energy storage capacitor;
one end of the energy storage capacitor is connected with the reset chip, and the other end of the energy storage capacitor is grounded.
Further, the device also comprises a decoupling capacitor;
one end of the decoupling capacitor is connected with the power input end of the reset chip, and the other end of the decoupling capacitor is grounded.
Further, the reset chip is an SOT23 packaged chip or an SOT6 packaged chip.
Further, the reset chip is a CE8818 chip.
In conclusion, the beneficial effects of the utility model are as follows: the circuit structure is simple, the power-on automatic starting process of the intelligent module is simplified, and the use convenience of the circuit is improved.
Drawings
Fig. 1 is a schematic connection diagram of a power-on and power-on circuit of an intelligent module in the prior art in the background art of the embodiment of the present invention;
fig. 2 is a schematic connection diagram of an auto-boot circuit of an intelligent module according to an embodiment of the present invention.
Description of reference numerals:
c1, an energy storage capacitor; c2, decoupling capacitance;
k1, a starting button;
r1, current limiting resistor;
VCC and a power supply;
u1 and an intelligent module; u2, reset chip.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 2, an automatic power-on circuit of an intelligent module U1 includes an intelligent module U1, a power supply VCC, and a reset chip U2;
the power supply output end of the power supply VCC is connected with the power supply input end of the reset chip U2 and the battery voltage input end of the intelligent module U1;
and the reset signal output end of the reset chip U2 is connected with the power supply awakening end of the intelligent module U1.
From the above description, the beneficial effects of the present invention are: the utility model provides an automatic start-up circuit of intelligent module U1 utilizes reset chip U2 to monitor the power supply output of power supply VCC to provide the reset signal that is used for the power-on start-up for intelligent module U1, and its circuit structure is simple, simplifies the automatic start-up flow of power-on of intelligent module U1, promotes its convenience of use.
Further, the device also comprises a current limiting resistor R1;
and the reset signal output end of the reset chip U2 is connected with the power supply wake-up end of the intelligent module U1 through the current-limiting resistor R1.
From the above description, the current limiting resistor R1 can limit the current of the output signal of the reset chip U2, and ensure that the signal input to the power wake-up terminal of the intelligent module U1 is a safety signal in an applicable range.
Further, a power-on key K1 is also included;
one end of the power-on key K1 is connected with one end of the current-limiting resistor R1 far away from the reset chip U2 and the power supply wake-up end of the intelligent module U1, and the other end of the power-on key K1 is grounded.
From the above description, the power-on key K1 realizes the function of pulling down the signal at the power wake-up end of the intelligent module U1 by manually pressing the key, thereby completing the process of manually powering on and powering on. Meanwhile, the startup key K1 can be matched with the current-limiting resistor R1 when pressed down, so that the direct grounding short circuit of the output signal of the reset chip U2 is avoided, and the safety of components in a loop is protected.
Further, the energy storage capacitor C1 is also included;
one end of the energy storage capacitor C1 is connected with the reset chip U2, and the other end of the energy storage capacitor C1 is grounded.
As can be seen from the above description, the energy storage capacitor C1 can increase the holding time of the reset chip U2 for outputting the reset signal for storing the charges.
Further, a decoupling capacitor C2 is also included;
one end of the decoupling capacitor C2 is connected with the power input end of the reset chip U2, and the other end of the decoupling capacitor C2 is grounded.
As can be seen from the above description, the decoupling capacitor C2 is connected to the power input terminal of the reset chip U2, which can play a role in resisting interference and improve the stability of the power signal.
Further, the reset chip U2 is an SOT23 packaged chip or an SOT6 packaged chip.
As can be seen from the above description, the reset chip U2 can be packaged using SOT23 or SOT6, and its size is selected in accordance with the actual design requirements.
Further, the reset chip U2 is a CE8818 chip.
As can be seen from the above description. The CE8818 chip is an adjustable reset chip U2 with a delay capacitor, and is convenient to use.
Referring to fig. 2, a first embodiment of the present invention is:
an automatic startup circuit of an intelligent module U1 is shown in FIG. 2 and includes an intelligent module U1, an energy storage capacitor C1, a decoupling capacitor C2, a power supply VCC and a reset chip U2. The power supply output end of the power supply VCC is connected with the power supply input end of the reset chip U2 and the battery voltage input end of the intelligent module U1. And a reset signal output end of the reset chip U2 is connected with a power supply wake-up end of the intelligent module U1. One end of the decoupling capacitor C2 is connected to the power input terminal of the reset chip U2, and the other end of the decoupling capacitor C2 is grounded. One end of the energy storage capacitor C1 is connected with the reset chip U2, and the other end of the energy storage capacitor C1 is grounded.
In this embodiment, the use process of the automatic start-up circuit of the intelligent module U1 is as follows:
firstly, the power supply output of a power supply VCC is turned on, namely the intelligent module U1 is powered on, then, the reset chip U2 detects that the power supply VCC is output, the reset chip U2 enters a reset state, and the reset signal output end outputs a low-level electrical signal to the power supply awakening end of the intelligent module U1; and finally, the intelligent module U1 normally opens the power supply after detecting that the power supply awakening end has a low level signal for a certain time, namely, the power supply automatic start-up is completed. Moreover, in order to further ensure the stability of the operation of the intelligent module U1, after the power-on and power-on are started, the reset chip U2 may also continue to maintain the reset state for a period of time.
In the present embodiment, the reset chip U2 preferably has two optional simple and easy-to-use packaging forms of SOT23 and SOT6, and a CE8818 chip can be selected. In other equivalent embodiments, other models of reset chip U2 may also be used for the reset chip U2. Moreover, the power supply VCC can also adopt a USB interface power supply.
Referring to fig. 2, the second embodiment of the present invention is:
an automatic power-on circuit of an intelligent module U1 is shown in fig. 2, and further includes a current limiting resistor R1 and a power-on key K1 based on the second embodiment. The reset signal output end of the reset chip U2 is connected with the power supply wake-up end of the intelligent module U1 through the current-limiting resistor R1. One end of the power-on key K1 is connected with one end of the current-limiting resistor R1 far away from the reset chip U2 and the power supply wake-up end of the intelligent module U1, and the other end of the power-on key K1 is grounded.
In this embodiment, the intelligent module U1 further has a function of powering on and manually powering on, and the power wake-up end of the intelligent module U1 is powered down by the power key K1 to replace the original reset signal of the reset chip U2. Meanwhile, the current limiting resistor R1 can also prevent the high-level output of the reset chip U2 from being directly grounded and shorted.
In summary, the present invention discloses an automatic power-on circuit for an intelligent module, which utilizes a reset chip to monitor the power supply output of a power supply to provide a reset signal for power-on for the intelligent module, and has the advantages of simple circuit structure, simplified power-on automatic power-on process of the intelligent module, configuration of a power-on manual power-on function consisting of a current limiting resistor and a power-on button, and addition of an energy storage capacitor for increasing the effective signal output duration of the reset chip, and improvement of the stability of a power signal.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the contents of the present specification and the drawings, or applied to the related technical fields directly or indirectly, are included in the scope of the present invention.
Claims (7)
1. An intelligent module automatic starting circuit is characterized by comprising an intelligent module, a power supply and a reset chip;
the power supply output end of the power supply is simultaneously connected with the power supply input end of the reset chip and the battery voltage input end of the intelligent module;
and the reset signal output end of the reset chip is connected with the power supply awakening end of the intelligent module.
2. The intelligent module auto-on circuit of claim 1, further comprising a current limiting resistor;
and the reset signal output end of the reset chip is connected with the power supply awakening end of the intelligent module through the current-limiting resistor.
3. The intelligent module auto-on circuit according to claim 2, further comprising an on button;
one end of the start-up key is simultaneously connected with one end of the current-limiting resistor, which is far away from the reset chip, and the power supply awakening end of the intelligent module, and the other end of the start-up key is grounded.
4. The intelligent module auto-on circuit according to claim 1, further comprising an energy storage capacitor;
one end of the energy storage capacitor is connected with the reset chip, and the other end of the energy storage capacitor is grounded.
5. The intelligent module auto-on circuit according to claim 1, further comprising a decoupling capacitor;
one end of the decoupling capacitor is connected with the power input end of the reset chip, and the other end of the decoupling capacitor is grounded.
6. The auto-on circuit of claim 1, wherein the reset chip is a SOT23 packaged chip or a SOT6 packaged chip.
7. The auto-on circuit of claim 1, wherein the reset chip is a CE8818 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122132367.7U CN215642599U (en) | 2021-09-03 | 2021-09-03 | Automatic start-up circuit of intelligent module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122132367.7U CN215642599U (en) | 2021-09-03 | 2021-09-03 | Automatic start-up circuit of intelligent module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215642599U true CN215642599U (en) | 2022-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122132367.7U Active CN215642599U (en) | 2021-09-03 | 2021-09-03 | Automatic start-up circuit of intelligent module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215642599U (en) |
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2021
- 2021-09-03 CN CN202122132367.7U patent/CN215642599U/en active Active
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Address after: Room 201-9, Zone C, No. 18 Guanri Road, Phase II, Software Park, Torch High tech Zone, Xiamen City, Fujian Province, 361000 Patentee after: Fujian Huisibo Digital Technology Co.,Ltd. Address before: No. 89 Software Avenue, Tongpan Road, Gulou District, Fuzhou City, Fujian Province, 350000. 510, Floor 5, 34 #, Zone C, Fuzhou Software Park Patentee before: FUZHOU HUISIBO INFORMATION TECHNOLOGY Co.,Ltd. |