CN204965315U - MCU has a quick reset circuit who goes up electric time delay function - Google Patents
MCU has a quick reset circuit who goes up electric time delay function Download PDFInfo
- Publication number
- CN204965315U CN204965315U CN201520560514.2U CN201520560514U CN204965315U CN 204965315 U CN204965315 U CN 204965315U CN 201520560514 U CN201520560514 U CN 201520560514U CN 204965315 U CN204965315 U CN 204965315U
- Authority
- CN
- China
- Prior art keywords
- mcu
- resistance
- reset
- chip
- throne
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Electronic Switches (AREA)
Abstract
The utility model provides a MCU has a quick reset circuit who goes up electric time delay function, include: chip U1, resistance R7, resistance R8 and resistance R9 restore to the throne, chip U1's the signal output control end of restoring to the throne is connected to MCU's reset terminal through resistance R7 to through resistance R9 ground connection, resistance R8's both ends respectively with chip U1's power end and the signal output control end of restoring to the throne is connected. The utility model discloses a chip U1 and the peripheral circuit of restoring to the throne has realized that low voltage detecting restores to the throne and last electricity time delay starts the function, when outage or other reasons result in operating voltage to reduce to threshold values voltage 1.9V, can force to make MCU to get into the spare state of reset state protection in advance, guarantees that the data inside the MCU can not lost because of cutting off the power supply, when acting as electric power supply voltage and rising to threshold values voltage 1.9V, can just let the MCU initialization after last electricity time delay, guarantee to carry out normal initialization when MCU goes up the electricity.
Description
Technical field
The utility model relates to a kind of reset circuit, particularly relates to the quick-reset circuit with delayed function of a kind of MCU.
Background technology
Traditional MCU reset circuit is generally and is resetted by the mode of reset terminal (Reser end) the external RC circuit of MCU, the principle of this circuit reset is changed by the low and high level of the discharge and recharge control MCU reset terminal (Reser end) of RC components and parts, and then realize making the initialized object of MCU Program; Find in actual product uses, part MCU particularly domestic MCU estimation is the reason such as IC indoor design or technique, and simple external RC circuit " powers on " fast or there will be in " power down " process and crashes and cause the phenomenons such as product cannot normally use.
Summary of the invention
Technical problem to be solved in the utility model needs to provide a kind of structure simple, and the quick-reset circuit with delayed function that product can not be caused to crash.
To this, the utility model provides the quick-reset circuit with delayed function of a kind of MCU, comprising: reset chip U1, resistance R7, resistance R8 and resistance R9; The signal output control terminal of described reset chip U1 is connected to the reset terminal of MCU by resistance R7, and by resistance R9 ground connection; The two ends of described resistance R8 are connected with signal output control terminal with the power end of described reset chip U1 respectively.MCU described in the utility model is preferably the MCU on telepilot.
Further improvement of the utility model is, also comprises battery and resistance R4, the minus earth of described battery, and the positive pole of described battery is connected to the power end of described reset chip U1 by resistance R4.
Further improvement of the utility model is, also comprises electric capacity C13, and the positive pole of described battery is by electric capacity C13 ground connection.
Further improvement of the utility model is, described electric capacity C13 is for there being polar capacitor, and the positive pole of described battery is connected with the anode of described electric capacity C13, the plus earth of described electric capacity C13.
Further improvement of the utility model is, also comprises electric capacity C15, and the positive pole of described battery is by electric capacity C15 ground connection.
Compared with prior art, the beneficial effects of the utility model are: achieve low voltage test and reset circuit by reset chip U1 and peripheral circuit thereof, when power-off or other reasons cause the supply voltage of described quick-reset circuit to be reduced to threshold voltage 1.9V, the signal output control terminal of reset chip U1 can start the reset terminal (Reset) of output level "0" to MCU, namely output low level is to the reset terminal of MCU, and then injunction MCU enters reset mode protection Status of Backups in advance, ensure that the data inside MCU can not be lost because of power-off, upon power-up, when the supply voltage of described quick-reset circuit rises to threshold voltage 1.9V, reset signal will be released and make MCU initialization after about 50-200mS time delay, and then can normal initialization be carried out when ensure that MCU powers on, ensure that the work of program normal table, avoid the products such as the telepilot adopting homemade chip to crash, this 50-200mS is setting-up time, and described setting-up time is adjustable.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing, preferably embodiment of the present utility model is described in further detail.
As shown in Figure 1, this example provides the quick-reset circuit with delayed function of a kind of MCU, comprising: reset chip U1, resistance R7, resistance R8 and resistance R9; The signal output control terminal of described reset chip U1 is connected to the reset terminal of MCU by resistance R7, and by resistance R9 ground connection; The two ends of described resistance R8 are connected with signal output control terminal with the power end of described reset chip U1 respectively.
This routine described reset chip U1 is preferably RT9818T-18GV chip or CE8809C19M chip; This example also comprises battery and resistance R4, electric capacity C13 and electric capacity C15; The minus earth of described battery, the positive pole of described battery is connected to the power end of described reset chip U1 by resistance R4; The positive pole of described battery is by electric capacity C13 ground connection, and preferably, described electric capacity C13 is for there being polar capacitor, and the positive pole of described battery is connected with the anode of described electric capacity C13, the plus earth of described electric capacity C13; The positive pole of described battery is by electric capacity C15 ground connection.
This example achieves low voltage test and reset circuit by reset chip U1 and peripheral circuit thereof, described reset chip U1 is preferably RT9818T-18GV chip or CE8809C19M chip etc., when power-off or other reasons cause the supply voltage of described quick-reset circuit to be reduced to threshold voltage 1.9V, the signal output control terminal of reset chip U1 can export the reset terminal (Reset) of level "0" to MCU, namely output low level is to the reset terminal of MCU, and then injunction MCU enters reset mode protection Status of Backups in advance, ensure that the data inside MCU can not be lost because of power-off, upon power-up, when the supply voltage of described quick-reset circuit rises to threshold voltage 1.9V, reset signal will be released and make MCU initialization after about 50-200mS time delay, and then can normal initialization be carried out when ensure that MCU powers on, ensure that the work of program normal table, avoid product to crash, this 50-200mS is setting-up time, and described setting-up time is adjustable.
The embodiment of the above is better embodiment of the present utility model; not limit concrete practical range of the present utility model with this; scope of the present utility model comprises and is not limited to this embodiment, and the equivalence change that all shapes according to the utility model, structure are done is all in protection domain of the present utility model.
Claims (5)
1. a quick-reset circuit with delayed function of MCU, is characterized in that, comprising: reset chip U1, resistance R7 and resistance R9; The signal output control terminal of described reset chip U1 is connected to the reset terminal of MCU by resistance R7, and by resistance R9 ground connection; The common ground end ground connection of described reset chip U1.
2. the quick-reset circuit with delayed function of MCU according to claim 1, it is characterized in that, also comprise battery and resistance R4, the minus earth of described battery, the positive pole of described battery is connected to the power end of described reset chip U1 by resistance R4.
3. the quick-reset circuit with delayed function of MCU according to claim 2, is characterized in that, also comprises electric capacity C13, and the positive pole of described battery is by electric capacity C13 ground connection.
4. the quick-reset circuit with delayed function of MCU according to claim 3, is characterized in that, described electric capacity C13 is for there being polar capacitor, and the positive pole of described battery is connected with the anode of described electric capacity C13, the plus earth of described electric capacity C13.
5. the quick-reset circuit with delayed function of the MCU according to claim 2 to 4 any one, is characterized in that, also comprises electric capacity C15, and the positive pole of described battery is by electric capacity C15 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520560514.2U CN204965315U (en) | 2015-07-29 | 2015-07-29 | MCU has a quick reset circuit who goes up electric time delay function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520560514.2U CN204965315U (en) | 2015-07-29 | 2015-07-29 | MCU has a quick reset circuit who goes up electric time delay function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204965315U true CN204965315U (en) | 2016-01-13 |
Family
ID=55060369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520560514.2U Expired - Fee Related CN204965315U (en) | 2015-07-29 | 2015-07-29 | MCU has a quick reset circuit who goes up electric time delay function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204965315U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106843437A (en) * | 2017-02-08 | 2017-06-13 | 深圳市爱普特微电子有限公司 | It is a kind of to can be used for the zero quiescent dissipation electrification reset circuit of voltage detecting |
| CN107231145A (en) * | 2016-03-23 | 2017-10-03 | 中国科学院微电子研究所 | Reset unit and chip |
| CN112564680A (en) * | 2020-12-09 | 2021-03-26 | 杭州乾龙电器有限公司 | Power-on time delay hardware automatic reset circuit |
-
2015
- 2015-07-29 CN CN201520560514.2U patent/CN204965315U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107231145A (en) * | 2016-03-23 | 2017-10-03 | 中国科学院微电子研究所 | Reset unit and chip |
| CN107231145B (en) * | 2016-03-23 | 2020-10-27 | 中国科学院微电子研究所 | Reset unit and chip |
| CN106843437A (en) * | 2017-02-08 | 2017-06-13 | 深圳市爱普特微电子有限公司 | It is a kind of to can be used for the zero quiescent dissipation electrification reset circuit of voltage detecting |
| CN106843437B (en) * | 2017-02-08 | 2019-06-21 | 深圳市爱普特微电子有限公司 | A kind of zero quiescent dissipation electrification reset circuit can be used for voltage detecting |
| CN112564680A (en) * | 2020-12-09 | 2021-03-26 | 杭州乾龙电器有限公司 | Power-on time delay hardware automatic reset circuit |
| CN112564680B (en) * | 2020-12-09 | 2023-10-20 | 杭州乾龙电器有限公司 | Automatic reset circuit for power-on time-delay hardware |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204965315U (en) | MCU has a quick reset circuit who goes up electric time delay function | |
| CN202651773U (en) | Overvoltage protection device of direct current adapter | |
| CN204215352U (en) | Integration computer power-off protection power supply | |
| CN204650218U (en) | A kind of single-chip microcomputer Self-disconnecting restarts circuit | |
| CN103401215A (en) | Over-voltage and under-voltage protection circuit, protection socket and terminal | |
| CN204272066U (en) | For automatic boot circuit and the meter-copy collector of wireless communication module | |
| CN202772358U (en) | Intelligent protection type socket | |
| CN207835033U (en) | A kind of circuit reducing product stand-by power consumption | |
| CN203232871U (en) | Electrostatic protection circuit for IO port of USB flash disk | |
| CN202975963U (en) | Power adapter intelligent control circuit of laptop | |
| CN202633896U (en) | Circuit for protecting universal serial bus (USB) interface | |
| CN203747777U (en) | Reset circuit | |
| CN205121473U (en) | Computer power failure protection circuit | |
| CN204314639U (en) | POS deadlock circuit for forced shutdown | |
| CN204633735U (en) | A kind of refrigerator protective circuit | |
| CN204965079U (en) | Can improve circuit of anti ESD ability of MCU | |
| CN102780390B (en) | Slowly-starting circuit for mine direct current conversion intrinsic safe power supply | |
| CN203574423U (en) | Integration voltage stabilization and low voltage detection power supply chip applied to electronic product | |
| CN203800560U (en) | USB interface short circuit protection circuit | |
| CN203707842U (en) | Emergent special multifunctional mobile power supply dormancy circuit | |
| CN203205065U (en) | DVD player having anti-lightning function | |
| CN203415958U (en) | Battery discharge protection device of booster circuit | |
| CN202978402U (en) | Power-fail protection dual-standby power source circuit | |
| CN104345855B (en) | Current-limiting circuit for USB interface | |
| CN202678930U (en) | Gas meter power-off protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 Termination date: 20190729 |