CN202394231U - Novel microprocessor circuit - Google Patents
Novel microprocessor circuit Download PDFInfo
- Publication number
- CN202394231U CN202394231U CN 201120552345 CN201120552345U CN202394231U CN 202394231 U CN202394231 U CN 202394231U CN 201120552345 CN201120552345 CN 201120552345 CN 201120552345 U CN201120552345 U CN 201120552345U CN 202394231 U CN202394231 U CN 202394231U
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- Prior art keywords
- microprocessor
- voltage
- resistance
- triode
- watchdog chip
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Abstract
The utility model provides a novel microprocessor circuit which comprises a microprocessor, a super capacitor, a watchdog chip, resistors R1, R2 and R3, a voltage-regulator diode and a triode, wherein one end of the resistor R1 is connected with one end of the resistor R2 and the cathode of the voltage-regulator diode respectively, the other end of the resistor R2 is connected with a base electrode of the triode, a collector electrode of the triode is connected with one end of the resistor R3 and a first input/output end of the microprocessor respectively, the other end of the resistor R3, the anode of the voltage-regulator diode and the cathode of the super capacitor are grounded, the anode of the super capacitor, and the other end of the resistor R1 and an emitter electrode of the triode are respectively connected with a system voltage end of the microprocessor respectively; and a voltage monitoring end of the watchdog chip is connected with the system voltage end of the microprocessor, and a reset signal output end of the watchdog chip is connected with a reset end of the microprocessor, and a second input/output end of the microprocessor is connected with a feeding-dog end of the watchdog chip. The circuit has the advantages of being scientific in design, easy to realize, and high in reliability.
Description
Technical field
The utility model relates to a kind of microcontroller circuit, specifically, has related to a kind of new type microprocessor circuit.
Background technology
Microprocessor technology has been widely used in producing and various fields in life, and the little toy that arrives arrives automobile, aircraft, steamer greatly, can find the shadow of microprocessor; Microprocessor is as the product that is widely used, and the reliability of its work is crucial beyond doubt, and especially for main equipment, any control error all possibly cause serious consequence.Various occasions at microprocessor work inevitably will receive various interference; When receiving serious interference, normal operating conditions is got back to by the system that still can guarantee, when running into accident power-off, the service data of system is unlikely to be destroyed, and this is the problem that in microprocessor system designs, pays particular attention to; When running into serious problem, can microprocessor system reliable reset become the key factor that can the system of influence reliably working.
Traditional system reset circuit has rc reset circuit, voltage monitoring reset chip reset circuit, hardware watchdog reset circuit etc.; Rc reset circuit commonly used, function singleness can not receive the problem that need reset when serious interference causes program fleet by settlement procedure; The voltage monitoring chip that resets can be monitored system voltage, and being lower than a certain magnitude of voltage can send reset signal to microprocessor, so that make system reset; Voltage monitoring adds the chip of feeding the dog function can the resolution system power-off reset and the system reset of program fleet.More than these application, when system's power down, resetting of system all is to accomplish moment; Do not inform in advance system and promptly will reset, for some particular application, system often has little time to preserve the important parameter in the operational process and causes parameter to be lost; And then influence the normal operation of system, or the moment that is about to reset in system, microprocessor writes data toward some storer; Owing to the unexpected reset of system makes the data write error mistake, cause system's operation undesired.
In order to solve the problem of above existence, people are seeking a kind of desirable technical solution always.
Summary of the invention
The purpose of the utility model is the deficiency to prior art, thereby providing a kind of conceives uniqueness, design science, be easy to realize, new type microprocessor circuit that reliability is high.
To achieve these goals, the technical scheme that the utility model adopted is: a kind of new type microprocessor circuit, and it comprises microprocessor U1, super capacitor C1, watchdog chip U2 and electric voltage observation circuit; Wherein, Said electric voltage observation circuit comprises resistance R 1, resistance R 2, resistance R 3, voltage stabilizing diode D1 and triode Q1; Said resistance R 1 one ends connect the negative pole of said resistance R 2 one ends and said voltage stabilizing diode D1 respectively; Said resistance R 2 other ends connect the base stage of said triode Q1; The collector of said triode Q1 connects said resistance R 3 one ends, and the positive pole of said resistance R 3 other ends and said voltage stabilizing diode D1 is ground connection respectively, and the emitter of said resistance R 1 other end and said triode Q1 is connected the system voltage end of said microprocessor U1 respectively; The collector of said triode Q1 connects first input/output terminal of said microprocessor U1; The positive pole of said super capacitor C1 connects the system voltage end of said microprocessor U1, the minus earth of said super capacitor C1; The voltage monitoring end of said watchdog chip U2 connects the system voltage end of said microprocessor U1; The reset signal output terminal of said watchdog chip U2 connects the reset terminal of said microprocessor U1, and second input/output terminal of said microprocessor U1 connects the dog that feeds of said watchdog chip U2 and holds.
The relative prior art of the utility model has substantive distinguishing features and progress; Specifically; This new type microprocessor circuit combines outer watchdog chip commonly used with voltage detecting circuit, super capacitor technology; Make microprocessor have power down early warning informing function,, avoid important parameter to lose so that microprocessor is in time preserved important parameter; The program fleet system automatically resets, can reliably working when guaranteeing that system runs into strong interference; Power-off reset early warning voltage is adjustable flexibly, is fit to the system of different operating voltage.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Through embodiment, the technical scheme of the utility model is done further detailed description below.
As shown in Figure 1, a kind of new type microprocessor circuit, it comprises microprocessor U1, super capacitor C1, watchdog chip U2 and electric voltage observation circuit; Wherein, Said electric voltage observation circuit comprises resistance R 1, resistance R 2, resistance R 3, voltage stabilizing diode D1 and triode Q1; Said resistance R 1 one ends connect the negative pole of said resistance R 2 one ends and said voltage stabilizing diode D1 respectively; Said resistance R 2 other ends connect the base stage of said triode Q1; The collector of said triode Q1 connects said resistance R 3 one ends, and the positive pole of said resistance R 3 other ends and said voltage stabilizing diode D1 is ground connection respectively, and the emitter of said resistance R 1 other end and said triode Q1 is connected the system voltage end of said microprocessor U1 respectively; The collector of said triode Q1 connects first input/output terminal of said microprocessor U1; The positive pole of said super capacitor C1 connects the system voltage end of said microprocessor U1, the minus earth of said super capacitor C1; The voltage monitoring end of said watchdog chip U2 connects the system voltage end of said microprocessor U1; The reset signal output terminal of said watchdog chip U2 connects the reset terminal of said microprocessor U1, and second input/output terminal of said microprocessor U1 connects the dog that feeds of said watchdog chip U2 and holds.
When system's power down; Super capacitor C1 store electrical energy guaranteed before voltage falls to threshold voltage and causes that watchdog chip U2 resets, and there is the sufficient time in system; Inform that microprocessor system is about to power down; Make microprocessor that time enough arranged, the important parameter in the saved system operational process avoids parameter to lose.
System reset informs that threshold voltage by voltage stabilizing diode D1 decision, informs the time that resets continued of threshold values to watchdog chip U2 from system reset, and the power consumption when normally being moved by the capacity of super capacitor C1 and system determines.
Said electric voltage observation circuit is used for the supply voltage of microprocessor is monitored, and under the normal operation, the GPIO1 of microprocessor U1 end is high level; When system voltage was lower than the voltage of voltage regulation of voltage stabilizing diode D1, triode Q1 ended, and the GPIO1 end of microprocessor U1 will detect low level; Be about to power down with apprizing system; When monitoring this pin when being low level, microprocessor U1 can carry out the preservation of important parameter, simultaneously; Microprocessor U1 stops the read-write operation to storer, avoids destroying important systematic parameter.
Watchdog chip U2 has software simultaneously and feeds dog and low-voltage auto-reset function; When super capacitor C1 continuous discharge; When making system voltage be lower than the threshold voltage of watchdog chip U2, watchdog chip U2 can make the microprocessor reliable reset, when the program fleet of microprocessor U1; Do not have feeding-dog signal to give watchdog chip U2, then watchdog chip U2 also can make the microprocessor reliable reset.
Owing to used super capacitor C1, the power supply ripple of system is significantly reduced, improved the stability of system.
Should be noted that at last: above embodiment only in order to the explanation the utility model technical scheme but not to its restriction; Although with reference to preferred embodiment the utility model has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can make amendment to the embodiment of the utility model perhaps is equal to replacement to the part technical characterictic; And not breaking away from the spirit of the utility model technical scheme, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (1)
1. new type microprocessor circuit, it is characterized in that: it comprises microprocessor U1, super capacitor C1, watchdog chip U2 and electric voltage observation circuit; Wherein, Said electric voltage observation circuit comprises resistance R 1, resistance R 2, resistance R 3, voltage stabilizing diode D1 and triode Q1; Said resistance R 1 one ends connect the negative pole of said resistance R 2 one ends and said voltage stabilizing diode D1 respectively; Said resistance R 2 other ends connect the base stage of said triode Q1; The collector of said triode Q1 connects said resistance R 3 one ends, and the positive pole of said resistance R 3 other ends and said voltage stabilizing diode D1 is ground connection respectively, and the emitter of said resistance R 1 other end and said triode Q1 is connected the system voltage end of said microprocessor U1 respectively; The collector of said triode Q1 connects first input/output terminal of said microprocessor U1; The positive pole of said super capacitor C1 connects the system voltage end of said microprocessor U1, the minus earth of said super capacitor C1; The voltage monitoring end of said watchdog chip U2 connects the system voltage end of said microprocessor U1; The reset signal output terminal of said watchdog chip U2 connects the reset terminal of said microprocessor U1, and second input/output terminal of said microprocessor U1 connects the dog that feeds of said watchdog chip U2 and holds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120552345 CN202394231U (en) | 2011-12-27 | 2011-12-27 | Novel microprocessor circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120552345 CN202394231U (en) | 2011-12-27 | 2011-12-27 | Novel microprocessor circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202394231U true CN202394231U (en) | 2012-08-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120552345 Expired - Fee Related CN202394231U (en) | 2011-12-27 | 2011-12-27 | Novel microprocessor circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202394231U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102521208A (en) * | 2011-12-27 | 2012-06-27 | 河南汉威电子股份有限公司 | Novel microprocessor circuit |
-
2011
- 2011-12-27 CN CN 201120552345 patent/CN202394231U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102521208A (en) * | 2011-12-27 | 2012-06-27 | 河南汉威电子股份有限公司 | Novel microprocessor circuit |
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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 |
Granted publication date: 20120822 Termination date: 20151227 |
|
| EXPY | Termination of patent right or utility model |