CN205721154U - A kind of food processing machine control circuit - Google Patents
A kind of food processing machine control circuit Download PDFInfo
- Publication number
- CN205721154U CN205721154U CN201620309253.1U CN201620309253U CN205721154U CN 205721154 U CN205721154 U CN 205721154U CN 201620309253 U CN201620309253 U CN 201620309253U CN 205721154 U CN205721154 U CN 205721154U
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- Prior art keywords
- control chip
- circuit
- audion
- power supply
- voltage conversion
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- 235000013305 food Nutrition 0.000 title claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims description 44
- 230000005611 electricity Effects 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 description 15
- 230000005540 biological transmission Effects 0.000 description 8
- 101100236764 Caenorhabditis elegans mcu-1 gene Proteins 0.000 description 6
- 101150044561 SEND1 gene Proteins 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 235000010469 Glycine max Nutrition 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
Abstract
This utility model one food processing machine control circuit, including the first control chip and the second control chip, described first control chip is powered by power supply VCC, described second control chip is powered by power vd D, it is characterized in that, described power supply VCC ＜ power vd D, it is provided with communicating circuit between described first control chip and the second control chip, described communicating circuit includes that the data for described first control chip data are transferred to described second control chip send protection circuit, for described second control chip data being transferred to the data receiver protection circuit of described first control chip.Sending protection circuit by data and data receiver protection circuit realizes the reliable communicating of chip between different potentials, protection chip pin is not damaged by high pressure.
Description
Technical field
This utility model relates to the control field of household kitchen electric appliance, particularly relates to a kind of food processing machine and controls electricity
Road.
Background technology
In soy bean milk making machine industry, along with the complication of control system, the quantity of main control chip gets more and more, and these master control cores
Sheet needs again to carry out each other communication, and different main control chips, it is frequently present of the situation that power supply is different, such as, main
5V when control chip 1 is powered, main control chip 2 power supply is 3.3V, if directly carrying out communication between 2, due to the difference of level, agree
Surely cannot realize communication the most reliably, and the voltage of high potential is directly connected on the port of electronegative potential, is easily damaged core
The port of sheet.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of food processing machine control circuit, for different potentials
Between the communication protection circuit of communication, realize the difference communication for electric potential chip chamber the most reliably, protect PORT COM.
In order to solve above technical problem, this utility model one food processing machine control circuit, including the first control
Chip and the second control chip, described first control chip powered by power supply VCC, and described second control chip is supplied by power vd D
Electricity, it is preferred that described power supply VCC ＜ power vd D, is provided with communication electricity between described first control chip and the second control chip
Road, described communicating circuit includes that the data for described first control chip data are transferred to described second control chip send
Protection circuit, for described second control chip data being transferred to the data receiver protection circuit of described first control chip.
Preferably, described data transmission protection circuit includes voltage conversion circuit.
Preferably, described voltage conversion circuit includes the first voltage conversion circuit and the second voltage conversion circuit, described
One voltage conversion circuit electric connection of power supply VCC and the data sending terminal mouth of described first control chip, described second voltage turns
Change circuit electric connection of power supply VDD and the data receiver port of described second control chip, described first voltage conversion circuit and
Described second voltage conversion circuit electrical connection.
Preferably, described first voltage conversion circuit includes current-limiting resistance R1, audion T1, pull-up resistor R2, described three
The base stage of pole pipe T1 electrically connects the data sending terminal mouth of described first control chip, described audion by described current-limiting resistance R1
The emitter stage electric connection of power supply ground of T1, the colelctor electrode of described audion T1 passes through described pull-up resistor R2 electric connection of power supply VCC.
Preferably, described second voltage conversion circuit includes audion T2 and pull-up resistor R4, described audion T2's
Base stage electrically connects the colelctor electrode of described audion T1, the emitter stage electric connection of power supply ground of described audion T2, described audion T2
Colelctor electrode by described pull-up resistor R4 electric connection of power supply VDD.
Preferably, described voltage conversion circuit includes current-limiting resistance R7, audion T3, pull-up resistor R8.
Preferably, the data sending terminal mouth of base stage described first control chip of electrical connection of described audion T3, described three
The emitter stage electric connection of power supply ground of pole pipe T3, the colelctor electrode of described audion T3 passes through described pull-up resistor R8 electric connection of power supply
The outfan of the most described voltage conversion circuit of current collection of VDD, described audion T3 electrically connects the number of described second control chip
According to receiving port.
Preferably, described data transmission protection circuit also includes that telecommunication filtration circuit, described voltage conversion circuit pass through institute
State telecommunication filtration circuit and electrically connect the data receiver port of described second control chip.
Preferably, described data receiver protection circuit includes current-limiting resistance R6, limiter diode D1 and filter capacitor C2.
Preferably, the negative electrode electric connection of power supply VCC of described limiter diode D1, the anode of described limiter diode D1 is electrically connected
Connecing the data receiver port of described first control chip, described filter capacitor C2 is electrically connected to the data of described first control chip
Between receiving port and power supply ground, one end of described current-limiting resistance R6 electrically connects the data receiver of described first control chip
Mouthful, the other end of described current-limiting resistance R6 electrically connects the data sending terminal mouth of described second control chip.
By increasing data between the chip communication circuit powered at two different potentials and send protection circuit and data connecing
Receive protection circuit, it is possible to achieve the frequency converter of communication between different potentials, prevent the communication caused because of signal level difference
Abnormal problem.
By increasing data between the chip communication circuit powered at two different potentials and send protection circuit and data connecing
Receive protection circuit, the port protection of low voltage power supply end can be protected, the problem preventing from causing chip port to damage because of high pressure.
Accompanying drawing explanation
The present invention is described in further detail with detailed description of the invention below in conjunction with the accompanying drawings:
Fig. 1 is the logical schematic of the embodiment 1 of this utility model a kind of food processing machine control circuit；
Fig. 2 is the circuit theory sketch of the embodiment 1 of this utility model a kind of food processing machine control circuit；
Fig. 3 is that the data transmission protection circuit of the embodiment 2 of this utility model a kind of food processing machine control circuit is former
Reason sketch.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is described in further detail:
Embodiment 1:
As it is shown in figure 1, a kind of food processing machine control circuit, including the first control chip and the second control chip, institute
Stating the first control chip to be powered by power supply VCC, described second control chip is powered by power vd D, it is characterised in that described power supply
VCC ＜ power vd D, is provided with communicating circuit between described first control chip and the second control chip, described communicating circuit includes
Send protection circuit for described first control chip data being transferred to the data of described second control chip, be used for described
Second control chip data are transferred to the data receiver protection circuit of described first control chip.
As in figure 2 it is shown, data send protection circuit, data receiver protection circuit and telecommunication filtration circuit in the present embodiment,
Physical circuit connects as follows:
1, protection circuit is sent:
Sending protection circuit circuit and include that described data send protection circuit and include voltage conversion circuit, described voltage is changed
Circuit includes the first voltage conversion circuit and the second voltage conversion circuit, described first voltage conversion circuit electric connection of power supply VCC
And the data sending terminal mouth of described first control chip, described second voltage conversion circuit electric connection of power supply VDD and described
The data receiver port of the second control chip, described first voltage conversion circuit and described second voltage conversion circuit electrical connection.
Described first voltage conversion circuit includes that current-limiting resistance R1, audion T1, pull-up resistor R2, the base stage of described audion T1 pass through
Described current-limiting resistance R1 electrically connects the data sending terminal mouth of described first control chip, the emitter stage electrical connection of described audion T1
Power supply ground, the colelctor electrode of described audion T1 passes through described pull-up resistor R2 electric connection of power supply VCC.Described second voltage conversion electricity
Road includes that the base stage of audion T2 and pull-up resistor R4, described audion T2 electrically connects the colelctor electrode of described audion T1, institute
Stating the emitter stage electric connection of power supply ground of audion T2, the colelctor electrode of described audion T2 is by described pull-up resistor R4 electrical connection electricity
Source VDD.
Operation principle: when the TXD port SEND1 end output low level of MCU1, the first voltage conversion circuit audion T1
Cut-off, now the C pole of audion T1 is due to the existence of pull-up resistor R2, and its output voltage is high level+3.3V；Now, second
Voltage conversion circuit input high level, audion T2 turns on, and its C end output voltage is low level, after filter circuit, MCU2
RXD port receive low level signal；When the TXD port SEND1 end of MCU1 exports high level, the first voltage conversion circuit
Audion T1 turns on, and now the C pole output voltage of audion T1 is low level；Now, the second voltage conversion circuit inputs low electricity
Flat, audion T2 ends, and its C end is because the existence of pull-up resistor R4, and output voltage is high level+5V, after filter circuit,
The RXD port of MCU2 receives high level signal.By above 2 kinds of states, it is achieved transmit from low-pressure end to the signal of high-pressure side
Process.
2, protection circuit is received:
Receive protection circuit and include current-limiting resistance R6, limiter diode D1 and filter capacitor C2.Described limiter diode D1
Negative electrode electric connection of power supply VCC, described limiter diode D1 anode electrically connect described first control chip data receiver
Mouthful, described filter capacitor C2 is electrically connected between data receiver port and the power supply ground of described first control chip, described current limliting
One end of resistance R6 electrically connects the data receiver port of described first control chip, the other end electrical connection of described current-limiting resistance R6
The data sending terminal mouth of described second control chip.
Its operation principle is that the RXD port of MCU1 receives when the transmission TXD port SEND2 output low level of MCU2
Low level signal；When the transmission TXD port SEND2 of MCU2 exports high level, owing to MCU2 power supply is+5V, passing through
After R6, by limiter diode D1, its output signal is limited in the amplitude of 3.3V+ limiter diode tube voltage drop Vt.By with
Upper 2 kinds of states, it is achieved from high-pressure side to the signals transmission of low-pressure end.
3, telecommunication filtration circuit
Described data send protection circuit and also include that telecommunication filtration circuit, described voltage conversion circuit are filtered by described communication
Wave circuit electrically connects the data receiver port of described second control chip.
It is emphasized that audion T1 and T2 of described first voltage conversion circuit and the second voltage conversion circuit uses
High-frequency triode, (different communication baud rates, capacitance selects to be had the electric capacity of its filter capacitor C1, C2 employing 1nF and following capacitance
Institute's difference).
Embodiment 2:
The present embodiment is with the difference of above-described embodiment 1, and described data send the voltage conversion circuit tool of protection circuit
Body circuit is different, concrete as it is shown on figure 3, described voltage conversion circuit includes current-limiting resistance R7, audion T3, pull-up resistor R8.
The base stage of described audion T3 electrically connects the data sending terminal mouth of described first control chip, the emitter stage electricity of described audion T3
Connecting power supply ground, the colelctor electrode of described audion T3 passes through described pull-up resistor R8 electric connection of power supply VDD, described audion T3's
The outfan of the most described voltage conversion circuit of current collection electrically connects the data receiver port of described second control chip.
Working principle of hardware: when the TXD port SEND1 end output low level of MCU1, voltage conversion circuit audion T3
Cut-off, now the C pole of audion T3 is due to the existence of pull-up resistor R8, and its output voltage is high level+5V；Pass through filter circuit
After, the RXD port of MCU2 receives high level signal；When the TXD port SEND1 end of MCU1 exports high level, voltage is changed
Circuit audion T3 turns on, and now the C pole output voltage of audion T3 is low level.By above 2 kinds of states, it is achieved from low pressure
Hold the signals transmission to high-pressure side.
Software work principle:
Mode one: MCU2 chip internal correspondence receives the software signal of pin and negates process, by sending protection electricity
Signal behind road, after being transferred to MCU2 chip pin, inside all negates process to its all signals received, real with this
Existing signal communication；
Signal is passed after carrying out negating process by the transmission pin software of mode two: MCU1 chip again by sending protection circuit
It is defeated by MCU2, realizes signal communication with this.
It is emphasized that protection scope of the present invention is including but not limited to above-mentioned detailed description of the invention.It is right to it should be pointed out that,
For those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to make some deformation and improvement, this
Also should be considered to belong to protection scope of the present invention a bit.
Claims (10)
1. a food processing machine control circuit, including the first control chip and the second control chip, described first controls core
Sheet is powered by power supply VCC, and described second control chip is powered by power vd D, it is characterised in that described power supply VCC ＜ power supply
VDD, is provided with communicating circuit between described first control chip and the second control chip, described communicating circuit includes for by described
First control chip data are transferred to the data of described second control chip and send protection circuit, for controlling core by described second
Sheet data are transferred to the data receiver protection circuit of described first control chip.
Food processing machine control circuit the most according to claim 1, it is characterised in that described data send protection circuit
Including voltage conversion circuit.
Food processing machine control circuit the most according to claim 2, it is characterised in that described voltage conversion circuit includes
First voltage conversion circuit and the second voltage conversion circuit, described first voltage conversion circuit electric connection of power supply VCC and described
The data sending terminal mouth of the first control chip, described second voltage conversion circuit electric connection of power supply VDD and described second controls
The data receiver port of chip, described first voltage conversion circuit and described second voltage conversion circuit electrical connection.
Food processing machine control circuit the most according to claim 3, it is characterised in that described first voltage conversion circuit
Including current-limiting resistance R1, audion T1, pull-up resistor R2, the base stage of described audion T1 is electrically connected by described current-limiting resistance R1
The data sending terminal mouth of described first control chip, the emitter stage electric connection of power supply ground of described audion T1, described audion T1
Colelctor electrode by described pull-up resistor R2 electric connection of power supply VCC.
Food processing machine control circuit the most according to claim 4, it is characterised in that described second voltage conversion circuit
Base stage including audion T2 and pull-up resistor R4, described audion T2 electrically connects the colelctor electrode of described audion T1, described
The emitter stage electric connection of power supply ground of audion T2, the colelctor electrode of described audion T2 passes through described pull-up resistor R4 electric connection of power supply
VDD。
Food processing machine control circuit the most according to claim 2, it is characterised in that described voltage conversion circuit includes
Current-limiting resistance R7, audion T3, pull-up resistor R8.
Food processing machine control circuit the most according to claim 6, it is characterised in that the base stage electricity of described audion T3
Connect the data sending terminal mouth of described first control chip, the emitter stage electric connection of power supply ground of described audion T3, described three poles
The colelctor electrode of pipe T3 passes through described pull-up resistor R8 electric connection of power supply VDD, and the most described voltage of current collection of described audion T3 turns
The outfan changing circuit electrically connects the data receiver port of described second control chip.
Food processing machine control circuit the most according to claim 2, it is characterised in that described data send protection circuit
Also including telecommunication filtration circuit, described voltage conversion circuit electrically connects described second control chip by described telecommunication filtration circuit
Data receiver port.
Food processing machine control circuit the most according to claim 1, it is characterised in that described data receiver protection circuit
Including current-limiting resistance R6, limiter diode D1 and filter capacitor C2.
Food processing machine control circuit the most according to claim 9, it is characterised in that described limiter diode D1's
The anode of negative electrode electric connection of power supply VCC, described limiter diode D1 electrically connects the data receiver port of described first control chip,
Described filter capacitor C2 is electrically connected between data receiver port and the power supply ground of described first control chip, described current-limiting resistance
One end of R6 electrically connects the data receiver port of described first control chip, and the other end electrical connection of described current-limiting resistance R6 is described
The data sending terminal mouth of the second control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620309253.1U CN205721154U (en) | 2016-04-14 | 2016-04-14 | A kind of food processing machine control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620309253.1U CN205721154U (en) | 2016-04-14 | 2016-04-14 | A kind of food processing machine control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205721154U true CN205721154U (en) | 2016-11-23 |
Family
ID=57307228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620309253.1U Active CN205721154U (en) | 2016-04-14 | 2016-04-14 | A kind of food processing machine control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205721154U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113541673A (en) * | 2020-04-15 | 2021-10-22 | 成都鼎桥通信技术有限公司 | Level conversion circuit, module and gateway |
-
2016
- 2016-04-14 CN CN201620309253.1U patent/CN205721154U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113541673A (en) * | 2020-04-15 | 2021-10-22 | 成都鼎桥通信技术有限公司 | Level conversion circuit, module and gateway |
| CN113541673B (en) * | 2020-04-15 | 2024-02-13 | 成都鼎桥通信技术有限公司 | Level conversion circuit, module and gateway |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 310018 No. 760 Yinhai Street, Xiasha Street, Hangzhou Economic and Technological Development Zone, Zhejiang Province Patentee after: HANGZHOU JIUYANG HOUSEHOLD ELECTRICAL APPLIANCES CO.,LTD. Country or region after: China Address before: 310018, No. 52, No. 22, Poplar Street, Hangzhou economic and Technological Development Zone, Zhejiang Patentee before: HANGZHOU JIUYANG HOUSEHOLD ELECTRICAL APPLIANCES CO.,LTD. Country or region before: China |