CN207135082U - A kind of light-coupled isolation communicating circuit between controller chip - Google Patents
A kind of light-coupled isolation communicating circuit between controller chip Download PDFInfo
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- CN207135082U CN207135082U CN201720987779.XU CN201720987779U CN207135082U CN 207135082 U CN207135082 U CN 207135082U CN 201720987779 U CN201720987779 U CN 201720987779U CN 207135082 U CN207135082 U CN 207135082U
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- controller chip
- transmission circuit
- photoelectrical coupler
- light
- side power
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Abstract
It the utility model is related to vehicle electronics communication technique field, specifically disclose the light-coupled isolation communicating circuit between a kind of controller chip, including the first transmission circuit being connected between the transmitting end of the first controller chip and the receiving end of second controller chip, and the second transmission circuit being connected between the transmitting end of the second controller chip and the receiving end of first controller chip, first working power connects the sending side power end of first transmission circuit, the receiving side power end of second transmission circuit, second working power connects the receiving side power end of first transmission circuit, the sending side power end of second transmission circuit.Its advantage is：Two controller chips are kept apart using photoelectrical coupler in the communication link of two controller chips, the distance of communication link is increased, reduces transmission interference, so as to ensure that communication quality, improve the antijamming capability of communication signal between controller chip.
Description
Technical field
It the utility model is related to the light-coupled isolation between vehicle electronics communication technique field, more particularly to a kind of controller chip
Communicating circuit.
Background technology
At present, the communication between each controller chip of automotive electronics with CAN (controller local area network), (LIN is total by LIN
Line is a kind of inexpensive serial communications network for being directed to automobile distribution electronic system and defining, and is to other automobiles such as CAN
A kind of supplement of multi-channel network) based on, but still suffer from what needs were directly communicated using TX and RX (pin terminals of chip)
Situation, especially point-to-point short distance communication, such as the Communication Control of air-conditioner controller and flight data recorder, air-conditioner controller and sky
Communication Control of makings quantity sensor etc..
Short distance communication between two controller chips, the communication link between sending and receiving end need to do filtering process, lead to
Frequently with way be to increase resistance filter circuit, capacitor filter or resistance capacitance filter circuit in a link.At one
In the communication link that the transmitting end of controller chip is formed with the receiving end of another controller chip, typically require that this is transmitted
End and receiving end common ground --- altogether, and the power supply of the two controller chips is consistent (while being+5V or+3.3V) ---
Same power supply, under the link design for meeting the requirement, the distance of the communication link will certainly be increased, so as to cause interference with increase,
Finally there is the situation of communication abnormality, influence communication quality.
The content of the invention
Existing technical problem is in the introduction, between two controller chips altogether, with the link design of power supply, lead
The distance increase of communication link is caused, and then disturbs increase, communication abnormality.
To solve above technical problem, the utility model provides the light-coupled isolation communicating circuit between a kind of controller chip,
Including the first transmission circuit being connected between the transmitting end of the first controller chip and the receiving end of second controller chip, and
The second transmitting-receiving electricity being connected between the transmitting end of the second controller chip and the receiving end of first controller chip
Road, the first working power connect the receiving side electricity of the sending side power end of first transmission circuit, second transmission circuit
Source, the second working power connect the receiving side power end of first transmission circuit, the sending side of second transmission circuit
Power end.
Specifically, first transmission circuit is provided with the first pull-up resistor, the second pull-up resistor, first port protection electricity
Resistance, second port protective resistance and the first photoelectrical coupler.
Specifically, the sending side power end of first transmission circuit, which connects, connects described the after first pull-up resistor
The diode cathode end of one photoelectrical coupler, the transmitting end of first controller chip connect the first port protective resistance
The diode cathode end of first photoelectrical coupler is connected afterwards；
After the receiving side power end of first transmission circuit connects second pull-up resistor, the second controller core
After the receiving end of piece connects the second port protective resistance, the transistor collector of first photoelectrical coupler is connected jointly
End.
Specifically, the transistor emitter of first photoelectrical coupler terminates the first ground.
Specifically, the first triode and first luminous two of photoelectric coupling is provided with the inside of first photoelectrical coupler
Pole pipe, diode cathode end, the diode cathode end of first photoelectrical coupler are respectively first light emitting diode
Positive pole, negative pole, the transistor collector end of first photoelectrical coupler, triode emission are extremely respectively the one or three pole
Colelctor electrode, the emitter stage of pipe.
Specifically, second transmission circuit is provided with the 3rd pull-up resistor, the 4th pull-up resistor, the 3rd port protection electricity
Resistance, the 4th port protection resistance and the second photoelectrical coupler.
Specifically, the sending side power end of second transmission circuit, which connects, connects described the after the 3rd pull-up resistor
The diode cathode end of two photoelectrical couplers, the transmitting end of first controller chip connect the 3rd port protection resistance
The diode cathode end of second photoelectrical coupler is connected afterwards；
After the receiving side power end of second transmission circuit connects the 4th pull-up resistor, the second controller core
After the receiving end of piece connects the 4th port protection resistance, the transistor collector of second photoelectrical coupler is connected jointly
End.
Specifically, the transistor emitter of second photoelectrical coupler terminates the second ground.
Specifically, the second triode and second luminous two of photoelectric coupling is provided with the inside of second photoelectrical coupler
Pole pipe, diode cathode end, the diode cathode end of second photoelectrical coupler are respectively second light emitting diode
Positive pole, negative pole, the transistor collector end of second photoelectrical coupler, triode emission are extremely respectively the two or three pole
Colelctor electrode, the emitter stage of pipe.
The utility model provides the light-coupled isolation communicating circuit between a kind of controller chip, in the logical of two controller chips
Two controller chips are kept apart using photoelectrical coupler in news link, the distance of communication link is increased, reduces transmission
Interference, so as to ensure that communication quality, improves the antijamming capability of communication signal between controller chip.
Brief description of the drawings
Fig. 1 is two Vehicle Controller chip chamber short distance communication electricity in the prior art that the utility model embodiment provides
The catenation principle figure on road；
Fig. 2 is that the connection of the light-coupled isolation communicating circuit between a kind of controller chip that the utility model embodiment provides is former
Reason figure.
Embodiment
Embodiment of the present utility model is specifically illustrated below in conjunction with the accompanying drawings, and embodiment is only given to illustrate mesh
, it can not be interpreted as to restriction of the present utility model, including the type selecting of component and value size and accompanying drawing are only preferably real
Example is applied, only for reference and explanation uses, and the limitation to the utility model patent protection domain is not formed, because not departing from this reality
On the basis of new spirit and scope, many changes can be carried out to the utility model.
It is two Vehicle Controller chip chamber short distances in the prior art that the utility model embodiment provides referring to Fig. 1
The catenation principle figure of communicating circuit, in the prior art, the first controller chip MCU_A and second controller chip MCU_B it
Between short distance communication, (in Fig. 1, TXD is transmitting end, and RXD is receiving end, and GND is earth terminal, and VCC is working power for sending and receiving end
End) between communication link need to do filtering process, the way of use is to increase resistance in a link, such as the R11 in Fig. 1 and
R12.In this communication link, the transmitting end (TXD) and receiving end (RXD) are typically required altogether (GND), and the two controllers
The same power supply of chip (while being+5V or+3.3V), but under the link design for meeting the requirement, the communication chain will certainly be increased
The distance on road, so as to cause interference with increase, so as to the situation of communication abnormality occur, influence communication quality.
It is the light between a kind of controller chip that the utility model embodiment provides referring to Fig. 2 to improve communication quality
Coupling isolates the catenation principle figure of communicating circuit.In the present embodiment, the light-coupled isolation communication between a kind of described controller chip
Circuit, including it is connected to the first controller chip MCU_A transmitting end TXD_A and second controller chip MCU_B receiving end
The first transmission circuit 1 between RXD_B, and it is connected to the transmitting end TXD_B of the second controller chip MCU_B and described the
The second transmission circuit 2 between one controller chip MCU_A receiving end RXD_A, the first working power VCC1 connections described
The sending side power end 1_X of one transmission circuit 1, the receiving side power end 2_R of second transmission circuit 2, the second working power
The receiving side power end 1_R of VCC2 connections first transmission circuit 1, the sending side power end 2_ of second transmission circuit 2
X。
Specifically, first transmission circuit 1 is provided with the first pull-up resistor Rb1, the second pull-up resistor Rb2, first port
Protective resistance Rp1, second port protective resistance Rp2 and the first photoelectrical coupler U1.
Specifically, connect after sending side power end 1_X connections the first pull-up resistor Rb1 of first transmission circuit 1
Connect the first photoelectrical coupler U1 diode cathode end U1_PIN1 (" PIN " in " PIN1 " represents pin, " 1 " represent draws
Pin is numbered, similarly hereinafter), the transmitting end TXD_A connections first port protective resistance Rp1 of the first controller chip MCU_A
The diode cathode end U1_PIN2 of the first photoelectrical coupler U1 is connected afterwards；
After receiving side power end 1_R connections the second pull-up resistor Rb2 of first transmission circuit 1, described second
After the controller chip MCU_B receiving end RXD_B connections second port protective resistance Rp2, first light is connected jointly
Electric coupler U1 transistor collector end U1_PIN3.
Specifically, the extreme U1_PIN4 of triode emission of the first photoelectrical coupler U1 meets the first ground GND1.
Specifically, the hairs of the first triode Q1 and first of photoelectric coupling are provided with the inside of the first photoelectrical coupler U1
Optical diode D1, the first photoelectrical coupler U1 diode cathode end U1_PIN1, diode cathode end U1_PIN2 difference
For positive pole (+), the negative pole (-) of the first light emitting diode D1, the transistor collector end of the first photoelectrical coupler U1
The extreme U1_PIN4 of U1_PIN3, triode emission is respectively colelctor electrode (c), the emitter stage (e) of the first triode Q1.
Specifically, second transmission circuit 2 is provided with the 3rd pull-up resistor Rb3, the 4th pull-up resistor Rb4, the 3rd port
Protective resistance Rp3, the 4th port protection resistance Rp4 and the second photoelectrical coupler U2.
Specifically, connect after sending side power end 2_X connections the 3rd pull-up resistor Rb3 of second transmission circuit 2
Connect the diode cathode end U2_PIN1 of the second photoelectrical coupler U2, the transmitting end of the first controller chip MCU_A
The diode cathode end U2_ of the second photoelectrical coupler U2 is connected after TXD_A connections the 3rd port protection resistance Rp3
PIN2；
After receiving side power end 2_R connections the 4th pull-up resistor Rb4 of second transmission circuit 2, described second
After controller chip MCU_B receiving end RXD_B connections the 4th port protection resistance Rp4, second light is connected jointly
Electric coupler U2 transistor collector end U2_PIN3.
Specifically, the extreme U2_PIN4 of triode emission of the second photoelectrical coupler U2 meets the second ground GND2.
Specifically, the hairs of the second triode Q2 and second of photoelectric coupling are provided with the inside of the second photoelectrical coupler U2
Optical diode D2, the second photoelectrical coupler U2 diode cathode end U2_PIN1, diode cathode end U2_PIN2 difference
For positive pole (+), the negative pole (-) of the second light emitting diode D2, the transistor collector end of the second photoelectrical coupler U2
The extreme U2_PIN4 of U2_PIN3, triode emission is respectively colelctor electrode (c), the emitter stage (e) of the second triode Q2.
As shown in Fig. 2 as the first controller chip MCU_AMCU_A by its transmitting end TXD_A to the described second control
When device chip MCU_BMCU_B processed receiving end RXD_B sends communication signal, it is high level when invalid, is low level when effective,
When the first port protective resistance Rp1 is low level, the first photoelectrical coupler U1 conductings, Rp1 is by original high level
Change turns to low level, i.e., the low level signal for the communication signal that described first controller chip MCU_A is sent is by described first
It is changed into the low level that the second controller chip MCU_B is received after photoelectrical coupler U1 isolation.Conversely, when the described second control
Device chip MCU_B sends communication letter by its transmitting end TXD_B to the receiving end RXD_A of the first controller chip MCU_A
Number when, it is as the same.In this way, realize the communication interaction of the chip chamber of short distance two.
Wherein, the first working power VCC1 and the first ground GND1 is the power supply of the first controller chip MCU_A
And ground, the second working power VCC2 and power supply and ground that the second ground GND2 is the second controller chip MCU_B.
Especially, the first working power VCC1 and the second working power VCC2 do not have restriction relation, can be identical
The voltage (being all+5V or+3.3V etc.) of pressure value or different voltages (one is+5V, and one is+3.3V, etc.)；Ordinary circumstance
Under, the first ground GND1 and the second ground GND2, it is two different ground.All resistance selects according to different occasions and performance
Select corresponding suitable value.
The utility model embodiment provides the light-coupled isolation communicating circuit between a kind of controller chip, in two controller cores
Two controller chips are kept apart using photoelectrical coupler (U1, U2) in the communication link of piece (MCU_A, MCU_B), increased
The distance of communication link, reduces transmission interference, so as to ensure that communication quality, improves communication signal between controller chip
Antijamming capability.
Above-described embodiment is the preferable embodiment of the utility model, but embodiment of the present utility model is not by above-mentioned
The limitation of embodiment, it is other it is any without departing from Spirit Essence of the present utility model with made under principle change, modify, replace
Generation, combination, simplify, should be equivalent substitute mode, be included within the scope of protection of the utility model.
Claims (9)
1. the light-coupled isolation communicating circuit between a kind of controller chip, it is characterised in that including being connected to the first controller chip
Transmitting end and second controller chip receiving end between the first transmission circuit, and be connected to the second controller chip
Transmitting end and first controller chip receiving end between the second transmission circuit, the first working power connection described the
The receiving side power end of the sending side power end of one transmission circuit, second transmission circuit, the second working power connection described in
The sending side power end of the receiving side power end of first transmission circuit, second transmission circuit.
2. the light-coupled isolation communicating circuit between a kind of controller chip as claimed in claim 1, it is characterised in that：Described first
Transmission circuit is provided with the first pull-up resistor, the second pull-up resistor, first port protective resistance, second port protective resistance and first
Photoelectrical coupler.
3. the light-coupled isolation communicating circuit between a kind of controller chip as claimed in claim 2, it is characterised in that：Described first
The sending side power end of transmission circuit is connecting the diode of first photoelectrical coupler just after connecting first pull-up resistor
Extremely, the transmitting end of first controller chip connects first photoelectric coupling after connecting the first port protective resistance
The diode cathode end of device；
After the receiving side power end of first transmission circuit connects second pull-up resistor, the second controller chip
After receiving end connects the second port protective resistance, the transistor collector end of first photoelectrical coupler is connected jointly.
4. the light-coupled isolation communicating circuit between a kind of controller chip as claimed in claim 3, it is characterised in that：Described first
The transistor emitter of photoelectrical coupler terminates the first ground.
5. the light-coupled isolation communicating circuit between a kind of controller chip as claimed in claim 4, it is characterised in that：Described
The inside of one photoelectrical coupler is provided with the first triode and the first light emitting diode of photoelectric coupling, first photoelectrical coupler
Diode cathode end, diode cathode end be respectively first light emitting diode positive pole, negative pole, the first photoelectricity coupling
The transistor collector end of clutch, triode emission are extremely respectively colelctor electrode, the emitter stage of first triode.
6. the light-coupled isolation communicating circuit between a kind of controller chip as claimed in claim 1, it is characterised in that：Described second
Transmission circuit is provided with the 3rd pull-up resistor, the 4th pull-up resistor, the 3rd port protection resistance, the 4th port protection resistance and second
Photoelectrical coupler.
7. the light-coupled isolation communicating circuit between a kind of controller chip as claimed in claim 6, it is characterised in that：Described second
The sending side power end of transmission circuit is connecting the diode of second photoelectrical coupler just after connecting the 3rd pull-up resistor
Extremely, the transmitting end of first controller chip connects second photoelectric coupling after connecting the 3rd port protection resistance
The diode cathode end of device；
After the receiving side power end of second transmission circuit connects the 4th pull-up resistor, the second controller chip
After receiving end connects the 4th port protection resistance, the transistor collector end of second photoelectrical coupler is connected jointly.
8. the light-coupled isolation communicating circuit between a kind of controller chip as claimed in claim 7, it is characterised in that：Described second
The transistor emitter of photoelectrical coupler terminates the second ground.
9. the light-coupled isolation communicating circuit between a kind of controller chip as claimed in claim 8, it is characterised in that：Described
The inside of two photoelectrical couplers is provided with the second triode and the second light emitting diode of photoelectric coupling, second photoelectrical coupler
Diode cathode end, diode cathode end be respectively second light emitting diode positive pole, negative pole, the second photoelectricity coupling
The transistor collector end of clutch, triode emission are extremely respectively colelctor electrode, the emitter stage of second triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720987779.XU CN207135082U (en) | 2017-08-09 | 2017-08-09 | A kind of light-coupled isolation communicating circuit between controller chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720987779.XU CN207135082U (en) | 2017-08-09 | 2017-08-09 | A kind of light-coupled isolation communicating circuit between controller chip |
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| Publication Number | Publication Date |
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| CN207135082U true CN207135082U (en) | 2018-03-23 |
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| CN201720987779.XU Active CN207135082U (en) | 2017-08-09 | 2017-08-09 | A kind of light-coupled isolation communicating circuit between controller chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737699A (en) * | 2019-10-28 | 2021-04-30 | 尼得科驱动专家有限公司 | Current splitter for a LIN bus system |
-
2017
- 2017-08-09 CN CN201720987779.XU patent/CN207135082U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737699A (en) * | 2019-10-28 | 2021-04-30 | 尼得科驱动专家有限公司 | Current splitter for a LIN bus system |
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