CN208314760U - A kind of communication system and conversion circuit - Google Patents
A kind of communication system and conversion circuit Download PDFInfo
- Publication number
- CN208314760U CN208314760U CN201820622261.0U CN201820622261U CN208314760U CN 208314760 U CN208314760 U CN 208314760U CN 201820622261 U CN201820622261 U CN 201820622261U CN 208314760 U CN208314760 U CN 208314760U
- Authority
- CN
- China
- Prior art keywords
- port
- circuit
- connect
- conversion circuit
- communication
- 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.)
- Active
Links
Landscapes
- Bidirectional Digital Transmission (AREA)
Abstract
The utility model embodiment is related to serial port communication technology field, more particularly to a kind of communication system and conversion circuit.The communication system includes: dual-wire communications unit comprising sends pin and receives pin；Conversion circuit comprising first port, second port and third port, first port are connect with pin is sent, and second port is connect with pin is received；Single line communication unit comprising communication port, communication port are connect with third port；Dual-wire communications unit carries out information exchange by the communication port of conversion circuit and single line communication unit.The dual-wire communications unit in communication system, which only passes through conversion circuit, as a result, to carry out information exchange with single line communication unit, and structure is simple, and procedure quantity is small, easy to accomplish.
Description
Technical field
The utility model embodiment is related to serial port communication technology field, more particularly to a kind of communication system and conversion electricity
Road.
Background technique
As electronic technology and scientific and technical are constantly progressive, singlechip technology is rapidly developed, and MCU also starts extensively
It is applied in people's production and life generally, almost all of MCU has standard serial port on the market at present.
But inventor is in the process of implementing the utility model, there are following technical problems for the discovery prior art: in reality
In the application of border, since product structure limits or in the case where the another party for participating in communication uses single line communication, MCU is by nothing
Method is normally communicated by the standard serial port of itself with other side.The solution used in the prior art is generally by adopting
With I/O port simulative serial port ensure they it is normal communicate, but it is larger to will lead to procedure quantity by the way of I/O port simulative serial port,
It realizes more difficult.
Utility model content
The utility model embodiment is mainly solving the technical problems that provide a kind of communication system, dual-wire communications unit
Information exchange can be carried out with single line communication unit by conversion circuit, structure is simple, and procedure quantity is small, easy to accomplish.
In a first aspect, in order to solve the above technical problems, the technical solution that the utility model embodiment uses is: mentioning
For a kind of communication system, comprising:
Dual-wire communications unit comprising send pin and receive pin；
Conversion circuit comprising first port, second port and third port, the first port and the transmission pin
Connection, the second port are connect with the reception pin；
Single line communication unit comprising communication port, the communication port are connect with the third port；
The dual-wire communications unit carries out information by the communication port of the conversion circuit and the single line communication unit
Interaction.
Optionally, the conversion circuit further includes diode and pull-up circuit；
The output end of the diode is connect with the first port, the input terminal of the diode and the second port
Connect with the third port, one end of the pull-up circuit is connected with the third port, the pull-up circuit it is another
End connects to power supply；
Wherein, described when the dual-wire communications unit sends information to the conversion circuit by the transmission pin
Dual-wire communications unit controls the reception pin and interrupts receive capabilities, alternatively, the dual-wire communications unit is connect by receiving pin
It is not acted according to the information after receiving the information, alternatively, the dual-wire communications unit is by receiving described in pin reception
The information is abandoned after information.
Optionally, the pull-up circuit includes first resistor；
One end of the first resistor is connect with the communication port of the single line communication unit, the first resistor it is another
End connects to power supply.
Optionally, the conversion circuit further includes current-limiting circuit；
The communication that the input terminal and second port of the diode pass through the current-limiting circuit and the single line communication unit
Port connection.
Optionally, the current-limiting circuit includes second resistance；
One end of the second resistance is connect with the input terminal of the diode and the second port respectively, and described second
The other end of resistance is connect with the communication port of the single line communication unit.
Optionally, the conversion circuit includes connection terminal, and the third port is set on the connection terminal, described
The 4th port, the 4th port ground connection are additionally provided on connection terminal.
Second aspect, in order to solve the above technical problems, another technical solution that the utility model embodiment uses is:
A kind of conversion circuit is provided, the communication connection being used between dual-wire communications unit and single line communication unit, the dual-wire communications
Unit includes sending pin and receiving pin, and the single line communication unit includes communication port, and the conversion circuit includes: first
Port, second port and third port；The first port and second port are drawn with the transmission pin and the reception respectively
Foot connection, the third port are connect with the communication port；The dual-wire communications unit by the conversion circuit with it is described
The communication port of single line communication unit carries out information exchange.
Optionally, the conversion circuit further includes connection terminal, diode, pull-up circuit and current-limiting circuit；
The output end of the diode is connect with the first port, the input terminal of the diode and the second port
It is connect with one end of the current-limiting circuit, one end of the other end of the current-limiting circuit and the pull-up circuit is with described
The connection of three ports, the other end of the pull-up circuit connect to power supply；
The third port is set on the connection terminal, and the 4th port is additionally provided on the connection terminal, described
4th port ground connection.
Optionally, the pull-up circuit includes first resistor, and the current-limiting circuit includes second resistance；
One end of the first resistor is connect with the third port, and the other end of the first resistor connects to power supply；
The input terminal of the diode and the second port are connect with one end of the second resistance, the second resistance it is another
End is connect with the third port.
Optionally, the conversion circuit further includes detection circuit and switch, one end of the detection circuit and described first
Port connection, the other end of the detection circuit are connect with the control terminal of the switch, and the input terminal of the diode passes through institute
Switch is stated to connect with the second port；
The detection circuit is for detecting whether have signal to input from the first port, if so, the detection circuit control
It makes the switch to disconnect, if it is not, closing the switch described in detection circuit control.
The beneficial effect of the utility model embodiment is: being in contrast to the prior art, the utility model embodiment party
A kind of communication system of formula, comprising: dual-wire communications unit comprising send pin and receive pin；Conversion circuit comprising the
Single port, second port and third port, the first port are connect with the transmission pin, and the second port connects with described
The connection of spasm foot；Single line communication unit comprising communication port, the communication port are connect with the third port；It is described double
Line communication unit carries out information exchange by the communication port of the conversion circuit and the single line communication unit.It communicates as a result,
Dual-wire communications unit in system can carry out information exchange with single line communication unit by conversion circuit, and structure is simple, program
Measure it is small, it is easy to accomplish.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these are exemplary
Illustrate not constitute the restriction to embodiment, the element in attached drawing with same reference numbers label is expressed as similar member
Part, unless there are special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the structural block diagram of the communication system of the utility model embodiment one；
Fig. 2 is a structural schematic diagram of the communication system of the utility model embodiment one；
Fig. 3 is another structural schematic diagram of the communication system of the utility model embodiment one；
Fig. 4 is a structural schematic diagram of the conversion circuit of the utility model embodiment two；
Fig. 5 is another structural schematic diagram of the conversion circuit of the utility model embodiment two.
Specific embodiment
For the ease of understanding the utility model, with reference to the accompanying drawings and detailed description, the utility model is carried out more
Detailed description.It should be noted that it can be directly in another element when element is expressed " being fixed on " another element
Upper or placed in the middle there may be one or more therebetween elements.When an element is expressed " connection " another element, it can
To be directly to another element or elements placed in the middle there may be one or more therebetween.This specification is used
Term "vertical", "horizontal", "left" and "right" and similar statement for illustrative purposes only.
Unless otherwise defined, technical and scientific term all used in this specification and the skill for belonging to the utility model
The normally understood meaning of the technical staff in art field is identical.Art used in the description of the utility model in this specification
Language is only for the purpose of describing specific embodiments, and is not intended to limitation the utility model.Art used in this specification
Language "and/or" includes any and all combinations of one or more related listed items.
Embodiment one
Referring to Fig. 1, the utility model embodiment one provides a kind of communication system 100, which includes:
Dual-wire communications unit 10, conversion circuit 20 and single line communication unit 30, conversion circuit 20 respectively with dual-wire communications unit 10 and single
Line communication unit 30 connects, and dual-wire communications unit 10 carries out letter by the communication port of conversion circuit 20 and single line communication unit 30
Breath interaction.
Wherein, dual-wire communications unit 10 includes that MCU (Microcontroller Unit, micro-control unit) etc. has standard
The communication module of serial ports, dual-wire communications unit 10 include sending pin TX and reception pin RX.
Further referring to Fig. 2, conversion circuit 20 includes first port 21, second port 22, third port 23, diode
D1, pull-up circuit 24 and current-limiting circuit 25.Specifically, first port 21 is used to connect with the transmission pin TX of dual-wire communications unit 10
It connects, second port 22 with the reception pin RX of dual-wire communications unit 10 for connecting；The output end and first port of diode D1
21 connections, the input terminal and second port 22 of diode D1 is connect with third port 23, further, in order to carry out port limit
Stream, the input terminal and second port 22 of diode D1 are connected by current-limiting circuit 25 and the communication port of single line communication unit 30
It connects, further alternative, current-limiting circuit 25 includes second resistance R2, the input with diode D1 respectively of one end of second resistance R2
End and second port 22 connect, and the other end of second resistance R2 passes through the communication port of third port 23 and single line communication unit 30
Connection；In order to guarantee in an idle state, the transmission pin TX and reception pin RX of dual-wire communications unit 10 are high level, with
Meet the basic demand of serial communication, therefore, pull-up circuit 24, one end of pull-up circuit 24 and is provided in conversion circuit 20
The connection of three ports 23, the other end of pull-up circuit 24 are connect with power Vcc；Further alternative, pull-up circuit 24 includes first
Resistance R1；One end of first resistor R1 is connect by third port 23 with the communication port of single line communication unit 30, first resistor
The other end of R1 is connect with power Vcc.Optionally, conversion circuit 20 further includes connection terminal P1,23 company of being set to of third port
On connecting terminal P1, the 4th port 26, the 4th port 26 ground connection are additionally provided on connection terminal P1.Optionally, in order to guarantee to communicate
The pressure drop of quality, diode D1 wants as small as possible, and diode D1 includes Schottky diode and germanium diode etc..Optionally,
The resistance value of first resistor R1 is one kilo-ohm, and the resistance value of second resistance R2 is one kilo-ohm.Optionally, connection terminal P1 includes screw cap end
Son and spring terminal etc..
Single line communication unit 30 includes communication port, and communication port is connect with third port 23.
Dual-wire communications unit 10 carries out information exchange by the communication port of conversion circuit 20 and single line communication unit 30, into
One step, in order to avoid when dual-wire communications unit 10 by send pin TX to conversion circuit 20 send information when, dual-wire communications
The reception pin RX of unit 10, which has received the information and goes forward side by side to take action, to be made to cause to malfunction, therefore, in the utility model embodiment one
In, when dual-wire communications unit 10 sends information to conversion circuit 20 by sending pin TX, the control of dual-wire communications unit 10 is closed
The receive capabilities of pin RX are closed, alternatively, dual-wire communications unit 10 after receiving pin RX reception information according to information by not carrying out
Movement, alternatively, dual-wire communications unit 10 is by abandoning information after reception pin RX reception information；Specifically, to work as two-pass
When believing that unit 10 sends information to conversion circuit 20 by sending pin TX, dual-wire communications unit 10, which is closed, receives connecing for pin RX
In case where receiving function, system work process is described further: when system starts, first standard serial port being carried out just
Beginningization then forbids the reception of dual-wire communications unit 10 to interrupt when needing to send data, that is, closes connecing for dual-wire communications unit 10
The receive capabilities of spasm foot RX, and the transmission pin TX for beginning through dual-wire communications unit 10 sends data, when needing to receive number
According to when, then open dual-wire communications unit 10 reception interrupt, i.e., unlatching dual-wire communications unit 10 reception pin RX reception function
Can, and start to receive data.
Certainly, it in other alternate embodiments, can also avoid working as dual-wire communications unit 10 by other technologies means
When sending information to conversion circuit 20 by sending pin TX, the reception pin RX of dual-wire communications unit has received the information and goes forward side by side
Action is made to cause to malfunction, for example, conversion circuit 20 further includes detection circuit 27 and switch 28, detection electricity further referring to Fig. 3
The one end on road 27 is connect with first port 21, and the other end of detection circuit 27 is connect with the control terminal (not shown) of switch 28, and two
The input terminal of pole pipe D1 is connect by switch 28 with second port 22；Detection circuit 27 is for detecting whether there is signal from first end
Mouth 21 inputs, if so, 27 control switch 28 of detection circuit disconnects, if it is not, 27 control switch 28 of detection circuit is closed.It is worth explanation
, detection circuit 27 and the response time of switch 28 are extremely short, are timely broken with ensuring that detection circuit 27 can control switch 28
It opens or is closed, to ensure the normal work of system.
It should be noted that being illustrated below to the working condition and principle of the utility model embodiment one:
Firstly, when dual-wire communications unit 10 is in idle condition, due to the presence of pull-up circuit 24, it can be ensured that two-wire
The transmission pin TX and reception pin RX of communication unit 10 are high level, meet the basic demand of serial communication.
Secondly, the transmission pin TX of dual-wire communications unit 10 will when dual-wire communications unit 10 is in and sends data mode
In the state for sending data, the level of communication port will change according to data content, to realize from dual-wire communications unit 10
Send pin TX send data transmission to single line communication unit 30 communication port.In order to avoid influencing communication, this is practical
Novel embodiment one can be avoided by above-mentioned technological means when dual-wire communications unit 10 is by sending pin TX to conversion electricity
When road 20 sends information, the reception pin RX of dual-wire communications unit 10, which has received the information and goes forward side by side to take action, makees to cause the feelings of error
Condition.
Finally, the level of communication port can be according to single line communication when dual-wire communications unit 10 is in and receives data mode
The data content variation that unit 30 is sent, since there are diode D1, the data of communication port do not interfere with transmission and draw at this time
Foot TX does not have any influence to standard serial port.
In the utility model embodiment one, communication system 100 includes: dual-wire communications unit 10 comprising transmission is drawn
Foot TX and reception pin RX；Conversion circuit 20 comprising first port 21, second port 22 and third port 23, first port
21 connect with pin TX is sent, and second port 22 is connect with pin RX is received；Single line communication unit 30 comprising communication port,
Communication port is connect with third port 23；Dual-wire communications unit 10 passes through the communication ends of conversion circuit 20 and single line communication unit 30
Mouth carries out information exchange.As a result, the dual-wire communications unit 10 in communication system 100 by conversion circuit 20 can and single line communication
Unit 30 carries out information exchange, realizes that standard serial port turns single line communication, compared with the prior art middle single-chip simulation single line serial port
When, need the plenty of time to write the mode of code and test, the utility model embodiment can be directly realized by communication, accelerate out
Hair progress, and structure is simple, procedure quantity is small, easy to accomplish.
Embodiment two
Fig. 4 and Fig. 5 are please referred to, the utility model embodiment two provides a kind of conversion circuit 20, is used for dual-wire communications
Communication connection between unit 10 and single line communication unit 30, dual-wire communications unit 10 include sending pin TX and reception pin
RX, single line communication unit 30 include communication port, and conversion circuit 20 includes: first port 21, second port 22 and third port
23；First port 21 and second port 22 are connect with transmission pin TX and reception pin RX respectively, third port 23 and communication ends
Mouth connection；Dual-wire communications unit 10 carries out information exchange by the communication port of conversion circuit 20 and single line communication unit 30.
Specifically, conversion circuit 20 further includes diode D1, pull-up circuit 24 and current-limiting circuit 25, first port 21 is used for
It is connect with the transmission pin TX of dual-wire communications unit 10, second port 22 is used to connect with the reception pin RX of dual-wire communications unit 10
It connects；The output end of diode D1 is connect with first port 21, and the input terminal and second port 22 of diode D1 is and third port
23 connections, further, in order to carry out port current limliting, the input terminal and second port 22 of diode D1 by current-limiting circuit 25 with
The communication port of single line communication unit 30 is attached, further alternative, and current-limiting circuit 25 includes second resistance R2, the second electricity
One end of resistance R2 is connect with the input terminal of diode D1 and second port 22 respectively, the other end and third port of second resistance R2
23 connections；One end of pull-up circuit 24 and third port 23 connect, and the other end of pull-up circuit 24 is connect with power Vcc；Into one
Step is optional, and pull-up circuit 24 includes first resistor R1；One end of first resistor R1 is connect with third port 23, first resistor R1
The other end connect with power Vcc.Optionally, conversion circuit 20 further includes connection terminal P1, and third port 23 is set to connection
In terminals P 1, the 4th port 26, the 4th port 26 ground connection are additionally provided on connection terminal P1.Further, in order to avoid when double
When line communication unit 10 sends information to conversion circuit 20 by sending pin TX, the reception pin RX of dual-wire communications unit is received
Information action of going forward side by side is made to cause to malfunction, and therefore, conversion circuit 20 further includes detection circuit 27 and switch 28, detection circuit 27
One end connect with first port 21, the other end of detection circuit 27 is connect with the control terminal (not shown) of switch 28, diode
The input terminal of D1 is connect by switch 28 with second port 22；Detection circuit 27 is for detecting whether there is signal from first port 21
Input, if so, 27 control switch 28 of detection circuit disconnects, if it is not, 27 control switch 28 of detection circuit is closed.It is worth explanation
It is that detection circuit 27 and the response time of switch 28 are extremely short, is timely disconnected with ensuring that detection circuit 27 can control switch 28
Or closure, to ensure the normal work of system.
In the utility model embodiment two, communication system 100 includes: dual-wire communications unit 10 comprising transmission is drawn
Foot TX and reception pin RX；Conversion circuit 20 comprising first port 21, second port 22 and third port 23, first port
21 with the transmission pin TX of dual-wire communications unit 10 for connecting, and the reception that second port 22 is used for dual-wire communications unit 10 is drawn
Foot RX connection, third port 23 with the communication port of single line communication unit 30 for connecting；Dual-wire communications unit 10 passes through conversion
The communication port of circuit 20 and single line communication unit 30 carries out information exchange.Dual-wire communications unit 10 passes through conversion circuit as a result,
20 can carry out information exchange with single line communication unit 30, realize that standard serial port turns single line communication, middle single compared with the prior art
When piece machine simulates single line serial port, the plenty of time is needed to write the mode of code and test, the utility model embodiment can be straight
Realization communication, Speeding up development progress are connect, and structure is simple, procedure quantity is small, easy to accomplish.
The foregoing is merely the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
It is equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, directly or indirectly uses
In other related technical areas, it is also included in the patent protection scope of the utility model.
Claims (10)
1. a kind of communication system characterized by comprising
Dual-wire communications unit comprising send pin and receive pin；
Conversion circuit comprising first port, second port and third port, the first port and the transmission pin connect
It connects, the second port is connect with the reception pin；
Single line communication unit comprising communication port, the communication port are connect with the third port；
The dual-wire communications unit carries out information exchange by the communication port of the conversion circuit and the single line communication unit.
2. communication system according to claim 1, which is characterized in that
The conversion circuit further includes diode and pull-up circuit；
The output end of the diode is connect with the first port, the input terminal of the diode and the second port with
Third port connection, one end of the pull-up circuit connects with the third port, the other end of the pull-up circuit and
Power supply connection；
Wherein, when the dual-wire communications unit sends information to the conversion circuit by the transmission pin, the two-wire
Communication unit controls the reception pin and interrupts receive capabilities, alternatively, the dual-wire communications unit receives institute by receiving pin
It is not acted according to the information after stating information, alternatively, the dual-wire communications unit receives the information by receiving pin
The information is abandoned afterwards.
3. communication system according to claim 2, which is characterized in that
The pull-up circuit includes first resistor；
One end of the first resistor is connect with the communication port of the single line communication unit, the other end of the first resistor with
Power supply connection.
4. communication system according to claim 2, which is characterized in that
The conversion circuit further includes current-limiting circuit；
The communication port that the input terminal and second port of the diode pass through the current-limiting circuit and the single line communication unit
Connection.
5. communication system according to claim 4, which is characterized in that
The current-limiting circuit includes second resistance；
One end of the second resistance is connect with the input terminal of the diode and the second port respectively, the second resistance
The other end connect with the communication port of the single line communication unit.
6. communication system according to claim 4, which is characterized in that
The conversion circuit further includes detection circuit and switch, and one end of the detection circuit is connect with the first port, institute
The other end for stating detection circuit is connect with the control terminal of the switch, the input terminal of the diode by the switch with it is described
Second port connection；
The detection circuit is for detecting whether have signal to input from the first port, if so, the detection circuit controls institute
It states switch to disconnect, if it is not, closing the switch described in detection circuit control.
7. a kind of conversion circuit, the communication connection being used between dual-wire communications unit and single line communication unit, the two-pass
Believe that unit includes sending pin and receiving pin, the single line communication unit includes communication port, which is characterized in that the conversion
Circuit includes:
First port, second port and third port；
The first port and second port are connect with the transmission pin and the reception pin respectively, the third port with
The communication port connection；
The dual-wire communications unit carries out information exchange by the communication port of the conversion circuit and the single line communication unit.
8. conversion circuit according to claim 7, which is characterized in that
The conversion circuit further includes connection terminal, diode, pull-up circuit and current-limiting circuit；
The output end of the diode is connect with the first port, the input terminal of the diode and the second port with
One end of the current-limiting circuit connects, one end of the other end of the current-limiting circuit and the pull-up circuit with the third end
Mouth connection, the other end of the pull-up circuit connect to power supply；
The third port is set on the connection terminal, is additionally provided with the 4th port on the connection terminal, and the described 4th
Port ground connection.
9. conversion circuit according to claim 8, which is characterized in that
The pull-up circuit includes first resistor, and the current-limiting circuit includes second resistance；
One end of the first resistor is connect with the third port, and the other end of the first resistor connects to power supply；It is described
The input terminal of diode and the second port are connect with one end of the second resistance, the other end of the second resistance with
The third port connection.
10. conversion circuit according to claim 9, which is characterized in that
The conversion circuit further includes detection circuit and switch, and one end of the detection circuit is connect with the first port, institute
The other end for stating detection circuit is connect with the control terminal of the switch, the input terminal of the diode by the switch with it is described
Second port connection；
The detection circuit is for detecting whether have signal to input from the first port, if so, the detection circuit controls institute
It states switch to disconnect, if it is not, closing the switch described in detection circuit control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820622261.0U CN208314760U (en) | 2018-04-27 | 2018-04-27 | A kind of communication system and conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820622261.0U CN208314760U (en) | 2018-04-27 | 2018-04-27 | A kind of communication system and conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208314760U true CN208314760U (en) | 2019-01-01 |
Family
ID=64713584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820622261.0U Active CN208314760U (en) | 2018-04-27 | 2018-04-27 | A kind of communication system and conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208314760U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111147341A (en) * | 2020-01-20 | 2020-05-12 | 苏州易泰勒电子科技有限公司 | Communication conversion circuit and communication system for RGV |
| CN114244390A (en) * | 2021-12-10 | 2022-03-25 | 深圳市精泰达科技有限公司 | Double-wire data and single-wire data communication conversion circuit |
-
2018
- 2018-04-27 CN CN201820622261.0U patent/CN208314760U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111147341A (en) * | 2020-01-20 | 2020-05-12 | 苏州易泰勒电子科技有限公司 | Communication conversion circuit and communication system for RGV |
| CN114244390A (en) * | 2021-12-10 | 2022-03-25 | 深圳市精泰达科技有限公司 | Double-wire data and single-wire data communication conversion circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208314760U (en) | A kind of communication system and conversion circuit | |
| CN205680208U (en) | A kind of single node bluetooth controlled in wireless self-help terminal equipment | |
| CN102856741A (en) | Multi-channel remote control switch socket | |
| CN105446929A (en) | Port multiplexing circuit capable of supporting SPI, I2C, I2CL and UART protocols | |
| CN105471569B (en) | Multinode electric current loop full-duplex communication circuit | |
| CN205792601U (en) | A kind of fiber optical transceiver of optical port self-adaptive | |
| CN107341118B (en) | A kind of common interface circuit of compatible MIPI signal output | |
| CN205540000U (en) | Intelligent control system for household appliances | |
| CN106227691B (en) | A kind of reciprocity bi-directional single-wire serial communication method based between MCU | |
| CN208128284U (en) | A kind of Ethernet based on S698PM turns Multi-path synchronous serial interface communication apparatus | |
| CN110505200A (en) | A kind of multi-protocols daisy chain interface conversion chip | |
| CN106354611A (en) | Monitoring device of terminal network state | |
| CN205921709U (en) | Accuse switch detection device in tax accuse tanker aircraft | |
| CN204496480U (en) | A kind ofly realize that mobile phone is made out an invoice, certification, printing communication connecting apparatus | |
| CN204044808U (en) | The device that a kind of RS232 of realization, RS485 and USB turn mutually | |
| CN207718777U (en) | A kind of digital tube display device of real-time display bus station fare information | |
| CN203552657U (en) | LED display screen module group with bidirectional communication | |
| CN102184153A (en) | RS-485 transmitting-receiving automatic conversion circuit | |
| CN203965471U (en) | Testing apparatus and communication device thereof | |
| CN106584862A (en) | 3D printing WIFI control system with built-in Web service and control method thereof | |
| CN208954085U (en) | A kind of inputting and transferring equipment, input unit | |
| CN202795821U (en) | Intelligent remote meter reading simulation teaching device | |
| CN101521124A (en) | Programmable time delay relay | |
| CN207337124U (en) | A kind of data acquisition circuit | |
| CN206490682U (en) | CAN and 422/485 common interface circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |