CN207442811U - A kind of electronic reset circuit and function module or device - Google Patents
A kind of electronic reset circuit and function module or device Download PDFInfo
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- CN207442811U CN207442811U CN201721273452.2U CN201721273452U CN207442811U CN 207442811 U CN207442811 U CN 207442811U CN 201721273452 U CN201721273452 U CN 201721273452U CN 207442811 U CN207442811 U CN 207442811U
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Abstract
The utility model discloses a kind of electronic reset circuit and function module or device, wherein electronic reset circuit includes：Reset signal output unit, for exporting reset signal；Reset signal be low level signal predetermined hold-time section after be converted to high level；First phase inverter, input terminal are connected with reset signal output unit, and output terminal is directly connected to or by the second phase inverter with treating the reset pin of reset chip with treating that the reset pin of reset chip is connected；First resistor is connected between the output terminal and input terminal of first phase inverter；The input terminal of first phase inverter is also by the first capacity earth, and also with treating that the output pin of reset chip is connected, when normally starting after reset chip reset, treats that the output pin of reset chip by output low transition is output high level.The utility model realizes the conversion of reset pin institute incoming level by capacitance charging process, so as to can repeatedly resend reset signal when reset chip does not start.
Description
Technical field
The utility model is related to chip periphery field of circuit technology, and in particular to a kind of electronic reset circuit and function module
Or device.
Background technology
Chip is often to hold when the running software in chip goes wrong as function module or the core component of device
It easily leads to entire function module or exception occurs in device.To solve the problems, such as this, the periphery of chip, which is usually all provided with, resets electricity
For providing reset function, reset reboot operation is carried out when chip runs and occurs abnormal for road.
Existing chip is usually that low level is effective, that is, it is low level certain time (such as 200ms) to require reset signal
High level is converted to afterwards.To realize this reset signal, prior art generally use RC reset circuits or reset chip.Figure
1 shows the schematic diagram of RC reset circuits.After reset circuit is connected, power supply (3.3V) is charged by resistance R to capacitance C, is connected
The momentary reset pin of power supply is low level, and the level of reset pin is high level after capacitance is fully charged after a period of time.By
This as it can be seen that RC reset circuits realize the process that reset pin converts from low level to high level by capacitance charging process,
Give chip reset signal.Above-mentioned RC reset circuits can also be realized by reset chip.
However, above-mentioned RC reset circuits or reset chip are only capable of providing a chip reset signal, when chip internal goes out
When now exception could not normally start, generally require the mode artificially re-powered or reset circuit weight is artificially made by button etc.
New connection can just make reset circuit to treating that reset chip sends reset signal again.
The content of the invention
In view of this, the utility model embodiment provides a kind of electronic reset circuit and function module or device, with solution
When certainly once resetting reboot operation could not be such that the chip normally starts, it is necessary to which manual operation can again be sent to reset chip is treated
The problem of reset signal.
The utility model first aspect provides a kind of electronic reset circuit, including：Reset signal output unit, for defeated
Go out reset signal；The reset signal be low level signal predetermined hold-time section after be converted to high level；First phase inverter,
Input terminal is connected with the reset signal output unit；Its output terminal be directly connected to treating the reset pin of reset chip or
It is connected by the second phase inverter with the reset pin for treating reset chip；The output terminal of first phase inverter and input terminal it
Between be connected with first resistor；The input terminal of first phase inverter also is waited to reset also by the first capacity earth with described
Chip output pin connection, when it is described after reset chip reset after normally start when, the output pin for treating reset chip
It is output high level by output low transition.
Optionally, the reset signal output unit includes reset chip.
Optionally, the reset signal output unit includes：Second resistance, its one end are connected to power supply, and the other end passes through
Second capacity earth；The output terminal of the reset signal output unit be arranged at the second resistance and second capacitance it
Between.
Optionally, also wrapped between the input terminal of the output terminal of the reset signal output unit and first phase inverter
It includes：First diode, the anode of first diode are connected with the input terminal of first phase inverter, cathode and the reset
The output terminal connection of signal output unit.
Optionally, further included between the input terminal of first phase inverter and the output pin for treating reset chip：The
Two diodes, the anode of second diode are connected with the output pin for treating reset chip, and cathode is anti-with described first
The input terminal connection of phase device.
Optionally, the phase inverter includes TTL NOT gate chips or CMOS inverter.
Optionally, the output pin for treating reset chip is connected to power supply by pull-up resistor.
Optionally, the output pin for treating reset chip is grounded by pull down resistor.
The utility model second aspect provides a kind of function module or device, including：Treat reset chip；First aspect or
Electronic reset circuit described in any one optional embodiment of person's first aspect.
The electronic reset circuit that the utility model embodiment is provided is exported by reset signal output unit and resets letter
Number, the reset signal be low level signal predetermined hold-time section after be converted to high level；Without just after reset chip reset
Low level is exported when often starting, and the input terminal of the first phase inverter is low level, output terminal is high level, and the first capacitance starts to fill
Electricity, after the first capacitance is fully charged, the input terminal of the first phase inverter is converted to high level, output terminal is converted to low level, passes through
Capacitance charging process realizes the conversion for the reset pin institute incoming level for treating reset chip, so as to treat that reset chip do not open
Reset signal can be repeatedly resend when dynamic, until treating that reset chip normally starts.
Description of the drawings
Can be more clearly understood the feature and advantage of the utility model by reference to attached drawing, attached drawing be schematically without
It is interpreted as carrying out any restrictions to the utility model, in the accompanying drawings：
Fig. 1 shows the schematic diagram of existing RC reset circuits；
Fig. 2 shows a kind of schematic diagram of electronic reset circuit according to the utility model embodiment
Fig. 3 shows the schematic diagram of another electronic reset circuit according to the utility model embodiment；
Fig. 4 shows the schematic diagram of another electronic reset circuit according to the utility model embodiment.
Specific embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, those skilled in the art's all other embodiments obtained without creative efforts, belongs to this reality
With novel protected scope.
Embodiment one
Fig. 2 shows a kind of schematic diagram of electronic reset circuit according to the utility model embodiment.Electronic reset electricity
Treat that reset chip includes at least one reset pin and an output pin for being resetted to chip in road.As shown in Fig. 2,
The electronic reset circuit includes reset signal output unit 10, the first phase inverter 20, resistance R1 and the first capacitance C1.
Reset signal output unit 10 resets letter for exporting, which is low level signal predetermined hold-time section
After be converted to high level.Existing RC reset circuits as shown in Figure 1 may be employed in the reset signal output unit 10, can also adopt
It realizes or can realize the circuit of the reset signal using other to realize with reset chip as shown in Figure 4, the application
It does not limit herein.
The input terminal of first phase inverter 20 is connected with reset signal output unit 10, and the output terminal of the first phase inverter 20 is with treating
The reset pin of reset chip 10 is directly connected to or by the second phase inverter 30 with treating that the reset pin of reset chip is connected.
First resistor R1 is connected between the output terminal and input terminal of first phase inverter 20.The input terminal of first phase inverter 20 also passes through
One capacitance C1 is grounded, and also with treating that the output pin of reset chip is connected, when normally starting after reset chip reset, is treated
The output pin of reset chip is output high level by output low transition.
Can be that (when i.e. reset pin input is high level, chip internal performs reset for high level reset when reset chip
Reboot operation), or low level resets.When reset chip for high level reset when, the output terminal of the first phase inverter 20
The reset pin for treating reset chip is connected directly to, as shown in Figure 2.When reset chip for low level reset when, the first reverse phase
The output terminal of device 20 is connected to the reset pin for treating reset chip by the second phase inverter 30, as shown in Figure 3.
Exemplified by treating that reset chip resets for low level, the operation principle for the electronic reset circuit that the present embodiment is provided is such as
Under：
As shown in figure 3, when reset signal output unit 10 exports low level, the input terminal of the first phase inverter 20 is low electricity
Flat, output terminal is high level, so that the input terminal of the second phase inverter 30 is high level, output terminal is low level, treats reset chip
Reset pin for low level, reset signal is effective, and chip internal, which performs, resets reboot operation, this is resets for the first time.In chip
Before the success of internal reset reboot operation, chip normally start, treat that the output pin of reset chip exports low level always.
After it is high level that the reset signal that reset signal output unit 10 is exported is by low transition, the first reverse phase
The input terminal of device 20 is high level.If chip internal resets reboot operation success, chip normally starts, the defeated of reset chip is treated
Go out pin and also export high level.At this point, the input terminal of the first phase inverter 20 is high level, output terminal is low level, the second reverse phase
The input terminal of device 30 is low level, output terminal is high level, and reset pin input is high level, and chip internal no longer performs reset
Reboot operation.
However, if chip internal reset reboot operation is unsuccessful, chip enough could not normally start, the defeated of reset chip is treated
It is low level to go out pin output.Even if the reset signal that reset signal output unit 10 is exported is high electricity by low transition
Flat, it is high level that the input terminal of the first phase inverter 20, which is still pulled low as low level, output terminal,.At this point, the second phase inverter 30
Input terminal is high level, output terminal is low level, treats the reset pin of reset chip as low level, reset signal is effective, chip
Inside, which performs, resets reboot operation；At the same time, the first capacitance C1 is started to charge up, and electric current is passed through from the output terminal of the first phase inverter 20
First resistor R1 flows to input terminal, after the first capacitance C1 is fully charged, the just extremely input of high level namely the first phase inverter 20
End is converted to high level, output terminal is low level, and the input terminal of the second phase inverter 30 is low level, output terminal is high level, multiple
Position pin input is high level, and chip internal no longer performs reset reboot operation, and secondary reset terminates.If chip internal resets weight
It opens to operate still unsuccessful, chip and could not reach and normally start, then the electronic reset circuit can also perform reset as procedure described above
Reboot operation third time, the 4th time, the 5th time ...
It should be added that above-mentioned only give the circuit diagram for treating that reset chip is low level reset, ability
Circuit design and above-mentioned principle of the field technique personnel based on the present embodiment, which are readily conceivable that, treats what reset chip resetted for high level
Circuit theory, details are not described herein by the application.
Above-mentioned electronic reset circuit exports reset signal by reset signal output unit, which is low level
High level is converted to after signal predetermined hold-time section；Low level is exported when after reset chip reset without normally starting, the
The input terminal of one phase inverter is low level, output terminal is high level, and the first capacitance starts to charge up, after the first capacitance is fully charged,
The input terminal of first phase inverter is converted to high level, output terminal is converted to low level, is realized and is treated again by capacitance charging process
The conversion of the reset pin institute incoming level of position chip, so as to can repeatedly be sent out again when reset chip does not start
Reset signal is sent, until treating that reset chip normally starts.
As a kind of optional embodiment of the present embodiment, as shown in figure 4, reset signal output unit 10 includes reset coil
The output terminal (RESET pins) of piece U1, reset chip U1 are connected with the input terminal of the first phase inverter 20.Optionally, reset coil is treated
The output pin of piece U1 is connected to power supply (such as 3.3V) by pull-up resistor R2.
As the embodiment in parallel of above-mentioned optional embodiment, reset signal output unit 10 can also be that RC resets electricity
Road, as shown in Figure 1, including second resistance R, its one end is connected to power supply, and the other end is grounded by the second capacitance C；Reset signal
The output terminal of output unit 10 is arranged between second resistance R and the second capacitance C.
As a kind of optional embodiment of the present embodiment, as shown in figure 4, the output terminal of reset signal output unit 10 with
Further include the first diode D1 between the input terminal of first phase inverter 20, the anode of the first diode D1 and the first phase inverter 20
Input terminal connects, and cathode is connected with the output terminal of reset signal output unit 10.When the output of reset signal output unit 10 is believed
Number by low transition for after high level, the first diode D1 can prevent the high level from influencing the charging process of capacitance C1,
Reset signal is formed again so as to influence the first phase inverter 20 and first resistor R1, the first capacitance C1.
As a kind of optional embodiment of the present embodiment, as shown in figure 4, the input terminal of the first phase inverter 20 is resetted with waiting
The second diode D2, the anode of the second diode D2 and the output pin for treating reset chip are further included between the output pin of chip
Connection, cathode are connected with the input terminal of the first phase inverter 20.Second diode can prevent the capacitance C1 after charging from externally putting
The level signal of the output pin of reset chip is treated in electricity and interference.
Optionally, above-mentioned first phase inverter, 20 and second phase inverter 30 can be TTL NOT gate chips or or
CMOS inverter.
Optionally, treat that the output pin of reset chip is grounded by pull down resistor R3.
Embodiment two
The utility model embodiment provides a kind of function module or device, including treat reset chip and embodiment one or its
Electronic reset circuit described in any one optional embodiment.
Although being described in conjunction with the accompanying the embodiment of the utility model, those skilled in the art can not depart from this
Various modification can be adapted in the case of the spirit and scope of utility model and modification, and such modifications and variations are each fallen within by appended power
Profit is required within limited range.
Claims (9)
1. a kind of electronic reset circuit, which is characterized in that including：
Reset signal output unit, for exporting reset signal；The reset signal is low level signal predetermined hold-time section
After be converted to high level；
First phase inverter, input terminal are connected with the reset signal output unit；Its output terminal and the reset for treating reset chip
Pin is directly connected to or is connected by the second phase inverter with the reset pin for treating reset chip；
First resistor is connected between the output terminal and input terminal of first phase inverter；The input terminal of first phase inverter is also
It by the first capacity earth, and is also connected with the output pin for treating reset chip, when described after reset chip resets
During normal startup, the output pin for treating reset chip is output high level by output low transition.
2. electronic reset circuit according to claim 1, which is characterized in that the reset signal output unit includes resetting
Chip.
3. electronic reset circuit according to claim 1, which is characterized in that the reset signal output unit includes：
Second resistance, its one end are connected to power supply, and the other end passes through the second capacity earth；The reset signal output unit it is defeated
Outlet is arranged between the second resistance and second capacitance.
4. electronic reset circuit according to claim 1, which is characterized in that the output terminal of the reset signal output unit
It is further included between the input terminal of first phase inverter：
First diode, the anode of first diode are connected with the input terminal of first phase inverter, cathode with it is described multiple
The output terminal connection of position signal output unit.
5. electronic reset circuit according to claim 1, which is characterized in that the input terminal of first phase inverter with it is described
It treats to further include between the output pin of reset chip：
Second diode, the anode of second diode are connected with the output pin for treating reset chip, cathode with it is described
The input terminal connection of first phase inverter.
6. electronic reset circuit according to claim 1 or 2, which is characterized in that the phase inverter includes TTL NOT gate chips
Or CMOS inverter.
7. electronic reset circuit according to claim 3, which is characterized in that the output pin for treating reset chip passes through
Pull-up resistor is connected to power supply.
8. electronic reset circuit according to claim 3, which is characterized in that the output pin for treating reset chip passes through
Pull down resistor is grounded.
9. a kind of function module or device, which is characterized in that including：
Treat reset chip；
Claim 1 to 8 any one of them electronic reset circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721273452.2U CN207442811U (en) | 2017-09-29 | 2017-09-29 | A kind of electronic reset circuit and function module or device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721273452.2U CN207442811U (en) | 2017-09-29 | 2017-09-29 | A kind of electronic reset circuit and function module or device |
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| Publication Number | Publication Date |
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| CN207442811U true CN207442811U (en) | 2018-06-01 |
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| CN201721273452.2U Active CN207442811U (en) | 2017-09-29 | 2017-09-29 | A kind of electronic reset circuit and function module or device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508582A (en) * | 2017-09-29 | 2017-12-22 | 创达特（苏州）科技有限责任公司 | A kind of electronic reset circuit and functional module or device |
-
2017
- 2017-09-29 CN CN201721273452.2U patent/CN207442811U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508582A (en) * | 2017-09-29 | 2017-12-22 | 创达特（苏州）科技有限责任公司 | A kind of electronic reset circuit and functional module or device |
| CN107508582B (en) * | 2017-09-29 | 2024-06-21 | 创耀(苏州)通信科技股份有限公司 | Electronic reset circuit and functional module or device |
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Address after: 215021 unit 133, phase 1, international science and Technology Park, 1355 Jinjihu Avenue, Suzhou Industrial Park, Suzhou, Jiangsu Province Patentee after: Chuangyao (Suzhou) communication technology Co., Ltd Address before: 215021 C504, international science and Technology Park, Jinji Lake Avenue, Suzhou Industrial Park, Jiangsu, 1355 Patentee before: Triductor Technology (Suzhou) Inc. |