CN208636823U - Compound serial port circuit - Google Patents
Compound serial port circuit Download PDFInfo
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- CN208636823U CN208636823U CN201821254101.1U CN201821254101U CN208636823U CN 208636823 U CN208636823 U CN 208636823U CN 201821254101 U CN201821254101 U CN 201821254101U CN 208636823 U CN208636823 U CN 208636823U
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Abstract
A kind of compound serial port circuit, including interface module, level switch module and control module, the level switch module are connected with the interface module and the control module；The level switch module can receive multiple and different interface level signals of the interface module, and receive every time interface level signal is converted into predetermined level signal；The predetermined level signal is also transmitted to the control module by the level switch module；When the control module is not received by the predetermined level signal, the control module can transfer data to the interface module by the level switch module.The compound serial port circuit of the utility model can be communicated from the serial equipment of different communications protocol, and compatibility is strong, and circuit structure is simple.
Description
Technical field
The utility model relates to electronic circuits, more particularly to a kind of compound serial port circuit.
Background technique
Controller of the concentrated controling management device as serial communication equipment need to carry out communication connection with serial communication equipment.
The serial equipment type that the serial line interface of existing concentrated controling management device is supported is single, for example, only supporting the string of RS232 type
Jaws equipment or the serial equipment for only supporting RS485 type.When concentrated controling management device needs simultaneously to multiple a variety of different communications
When the serial communication equipment of agreement is attached control, then communication converter is installed additional, but after installation converter, the cloth of converter
Line and placement position are all more intractable.
Utility model content
Based on this, it is necessary to which the serial equipment type supported for the serial line interface of concentrated controling management device single is asked
Topic, provides a kind of compound serial port circuit.
A kind of compound serial port circuit, including interface module, level switch module and control module, the level switch module
It is connected with the interface module and the control module；The level switch module can receive the interface module it is multiple not
Same interface level signal, and receive every time interface level signal is converted into predetermined level signal；The level
The predetermined level signal is also transmitted to the control module by conversion module；When the control module be not received by it is described pre-
If when level signal, the control module can transfer data to the interface module by the level switch module.
The level switch module includes that the first level conversion unit and second electrical level are converted in one of the embodiments,
Unit；First level conversion unit is used to receive the first interface level signal of the interface module, and will receive
First interface level signal is converted into predetermined level signal, and first level conversion unit also passes the predetermined level signal
Transport to the control module.
First level conversion unit includes the first electrical level transferring chip, the first power supply in one of the embodiments,
And first resistor；First electrical level transferring chip is equipped with pin A, pin B, pin R0, pin D1, pin RE and pin DE；
The pin A of first electrical level transferring chip is connect with first input end I1, pin B is connected with the first output end O1, and described
One input terminal I1 and the first output end O1 are connected with the interface module；
The pin R0 of first electrical level transferring chip is connected with second output terminal O2, first electrical level transferring chip
Pin D1 is connected with the second input terminal I2, pin RE and pin DE and the third input terminal I3 phase of first electrical level transferring chip
Even, the second input terminal I2, the third input terminal I3 and the second output terminal O2 are connected with the control module；It is described
The pin R0 of first electrical level transferring chip is also connected by the first resistor with first power supply.
The second electrical level converting unit is used to receive the second interface of the interface module in one of the embodiments,
Level signal, and the second interface level signal received is converted into predetermined level signal, the second electrical level converting unit
The predetermined level signal is also transmitted to the control module.
The second electrical level converting unit includes second electrical level conversion chip in one of the embodiments,；Described second
Electrical level transferring chip is equipped with pin R2IN, pin T2OUT, pin R1OUT and pin T2IN；The second electrical level conversion chip
Pin R2IN is connect with the 4th input terminal I4, pin T2OUT is connected with third output end O3, the 4th input terminal I4 and described
Third output end O3 is connected with the interface module；The pin R1OUT and the 4th output end O4 of the second electrical level conversion chip
Connection pin T2IN is connected with the second input terminal I2, and the 4th output end O4 is connected with the control module.
In one of the embodiments, the control module include main control chip and with door；The main control chip includes connecing
Spasm foot and transmission pin；It is described to be connected with the first input end of door with the second output terminal O2, it is described second defeated with door
Enter end to be connected with the 4th output end O4, it is described to be connected with the output end of door with the reception pin of the main control chip；It is described
The transmission pin of main control chip is connected with the second input terminal I2.
The main control chip further includes control pin in one of the embodiments,；The control pin of the main control chip
It is connected with the third input terminal I3；When the control module is not received by the predetermined level signal and the control module
When needing to transfer data to first electrical level transferring chip, the control pin is for passing through first electrical level transferring chip
Pin RE and pin DE control first electrical level transferring chip and be in transmission state, the control module is sent data to
The pin D1 of first electrical level transferring chip, and the interface module is transmitted to by first electrical level transferring chip.
The main control chip further includes the first instruction pin and the second instruction pin in one of the embodiments,；It is described
Control module further includes the first light emitting diode, the second light emitting diode, second resistance and 3rd resistor；The main control chip
First instruction pin is connected with the cathode of first light emitting diode, and the anode of first light emitting diode passes through described the
Two resistance are connected with first power supply, the cathode of the second instruction pin and second light emitting diode of the main control chip
It is connected, the anode of second light emitting diode is connected by the 3rd resistor with first power supply.
In one of the embodiments, the interface module include interface end, the 4th resistance, the 5th resistance, the 6th resistance,
7th resistance, the first TVS pipe, the second TVS pipe, third TVS pipe and the 4th TVS pipe；The interface end include first interface pin,
Second interface pin, third interface pin and the 4th interface pin；The first interface pin of the interface end passes through the described 4th
Resistance is connected with the cathode of the input terminal and first TVS pipe, the plus earth of first TVS pipe；The interface end
Second interface pin be connected by the 5th resistance with the cathode of first output end and second TVS pipe, it is described
The plus earth of second TVS pipe；The third interface pin of the interface end passes through the 6th resistance and the 4th input terminal
And the cathode of the third TVS pipe is connected, the plus earth of the third TVS pipe；4th interface pin of the interface end is logical
It crosses the 7th resistance to be connected with the cathode of the third output end O3 and the 4th TVS pipe, the anode of the 4th TVS pipe
Ground connection.
The compound serial port circuit of the utility model corresponds to the level turn of the serial equipment of different communications protocol by being arranged
Change the mold block, multiple and different interface level signals of receiving interface module, and by receive every time interface level signal
It is converted into predetermined level signal, predetermined level signal is also transmitted to control module, the data that control module can also be transmitted
It is transmitted to interface module, control module and the serial equipment of different communications protocol are communicated, compatibility is strong, circuit
Structure is simple.
Detailed description of the invention
Fig. 1 is the functional block diagram for the compound serial port circuit that the embodiments of the present invention provide；
Fig. 2 is the circuit diagram of the first level conversion unit of compound serial port circuit shown in FIG. 1；
Fig. 3 is the circuit diagram of the second electrical level converting unit of compound serial port circuit shown in FIG. 1；
Fig. 4 is the circuit diagram of the control module of compound serial port circuit shown in FIG. 1；
Fig. 5 is the circuit diagram of the interface module of compound serial port circuit shown in FIG. 1.
Specific embodiment
When an element was considered with another element " being connected ", it can be directly to another element or
It may be simultaneously present centering elements.Unless otherwise defined, all technical and scientific terms used herein and belong to this reality
It is identical with the novel normally understood meaning of those skilled in the art.Made in the specification of the utility model herein
Term, which is only for the purpose of describing specific embodiments, to be not intended to limit the utility model.
Referring to Fig. 1, Fig. 1 is the functional block diagram for the compound serial port circuit that the embodiments of the present invention provide.It is described
Compound serial port circuit includes interface module 10, level switch module 20 and control module 30, the level switch module 20 and institute
It states interface module 10 and the control module 30 is connected；The level switch module 20 can receive the more of the interface module 10
A different interface level signal, and receive every time interface level signal is converted into predetermined level signal；It is described
The predetermined level signal is also transmitted to the control module 30 by level switch module 20；When the control module 30 does not connect
When receiving the predetermined level signal, the control module 30 can be transferred data to described by the level switch module 20
Interface module 10.
It should be noted that the interface module 10 can be connected from the serial equipment of a variety of different communications protocol, and one
A interface module 10 is only connect with a serial equipment every time, and the serial equipment of different communications protocol and the interface module 10 connect
The interface level signal generated after connecing is different.The predetermined level signal is the level letter that the control module 30 can identify
Number.
The level switch module 20 includes the first level conversion unit 21 and second electrical level converting unit 22, correspondingly,
The interface level signal includes first interface level signal and second interface level signal.First level conversion unit 21
For receiving the first interface level signal of the interface module 10, and the first interface level signal received is converted into pre-
If level signal, the predetermined level signal is also transmitted to the control module 30 by first level conversion unit 21.
Referring to Fig. 2, first level conversion unit 21 includes the first electrical level transferring chip U1, the first power supply V1 and the
One resistance R1.The first electrical level transferring chip U1 is equipped with pin A, pin B, pin R0, pin D1, pin RE and pin DE.
The pin A of the first electrical level transferring chip U1 is connect with first input end I1, and pin B is connected with the first output end O1, described
First input end I1 and the first output end O1 are connected with the interface module 10, and the first electrical level transferring chip U1's draws
Foot R0 is connected with second output terminal O2, and the pin D1 of the first electrical level transferring chip U1 is connected with the second input terminal I2, described
The pin RE and pin DE of first electrical level transferring chip U1 is connected with third input terminal I3, the second input terminal I2, described
Three input terminal I3 and the second output terminal O2 are connected with the control module 30.The pin of the first electrical level transferring chip U1
R0 is also connected by the first resistor R1 with the first power supply V1.
By the first electrical level transferring chip U1, the interface module 10 will connect with the serial equipment of the first communications protocol
The first interface level signal delivered a child is converted into predetermined level signal and is transmitted to the control module 30, the control module
30 can transfer data to the interface module 10 by the first electrical level transferring chip U1, and then pass through the interface module
10 are transmitted to the serial equipment of the first communications protocol, so that the control module 30 can pass through first level conversion
Chip U1 and the serial equipment of the first communications protocol are communicated.In the present embodiment, the serial ports of first communications protocol
Equipment is RS485 serial equipment or RS422 serial equipment.
The second electrical level converting unit 22 is used to receive the second interface level signal of the interface module 10, and will connect
The second interface level signal received is converted into predetermined level signal, and the second electrical level converting unit 22 is also by the default electricity
Ordinary mail number is transmitted to the control module 30.
Referring to Fig. 3, the second electrical level converting unit 22 includes second electrical level conversion chip U2；The second electrical level turns
Chip U2 is changed equipped with pin R2IN, pin T2OUT, pin R1OUT and pin T2IN；The second electrical level conversion chip U2's draws
Foot R2IN is connect with the 4th input terminal I4, pin T2OUT is connected with third output end O3, the 4th input terminal I4 and described
Three output end O3 are connected with the interface module 10.The pin R1OUT and the 4th output end of the second electrical level conversion chip U2
O4 connection, pin T2IN are connected with the second input terminal I2, and the 4th output end O4 is connected with the control module 30.
By the second electrical level conversion chip U2, the interface module 10 will connect with the serial equipment of the second communications protocol
The second interface level signal delivered a child is converted into predetermined level signal and is transmitted to the control module 30, the control module
30 can transfer data to the interface module 10 by the second electrical level conversion chip U2, and then pass through the interface module
10 are transmitted to the serial equipment of the second communications protocol, so that the control module 30 can be converted by the second electrical level
Chip U2 and the serial equipment of the second communications protocol are communicated.In the present embodiment, the serial ports of second communications protocol
Equipment is RS232 equipment.
Referring to Fig. 4, the control module 30 include main control chip U3 and with door U4；The main control chip U3 includes receiving
Pin A4 and transmission pin A1；It is described to be connected with the first input end of door U4 with the second output terminal O2, it is described with door U4's
Second input terminal is connected with the 4th output end O4, the reception pin with the output end and the main control chip U3 of door U4
A4 is connected；The transmission pin A1 of the main control chip U3 is connected with the second input terminal I2.
The main control chip U3 further includes control pin C1；The control pin C1 of the main control chip U3 and the third are defeated
Enter to hold I3 to be connected；When the control module 30 is not received by the predetermined level signal and the control module 30 needs to transmit
When data are to the first electrical level transferring chip U1, the control pin C1 is for passing through the first electrical level transferring chip U1's
Pin RE and pin DE controls the first electrical level transferring chip U1 and is in transmission state, and the control module 30 transmits data
The extremely pin D1 of the first electrical level transferring chip U1, and the interface mould is transmitted to by the first electrical level transferring chip U1
Block 10.
The main control chip U3 further includes the instruction of the first instruction pin Y4 and second pin Y1；The control module 30 is also wrapped
Include the first light emitting diode D1, the second light emitting diode D2, second resistance R2 and 3rd resistor R3；The of the main control chip U3
One instruction pin Y4 is connected with the cathode of the first light emitting diode D1, and the anode of the first light emitting diode D1 passes through institute
It states second resistance R2 to be connected with the first power supply V1, the second instruction pin Y1 of the main control chip U3 shines with described second
The cathode of diode D2 is connected, and the anode of the second light emitting diode D2 passes through the 3rd resistor R3 and first power supply
V1 is connected.When the reception pin A4 of the main control chip U3 receives the predetermined level signal, the main control chip U3's
First instruction pin Y4 controls the first light emitting diode D1 and shines, to indicate that the main control chip U3 is receiving signal.When
When the transmission pin A1 of the main control chip U3 transfers data to the level switch module 20, the second of the main control chip U3
Indicate that pin Y1 controls the second light emitting diode D2 and shines, to indicate the main control chip U3 in transmission data.
Referring to Fig. 5, the interface module 10 includes interface end U5, the 4th resistance R4, the 5th resistance R5, the 6th resistance
R6, the 7th resistance R7, the first TVS (Transient Voltage Suppressor, Transient Suppression Diode) pipe D3, second
TVS pipe D4, third TVS pipe D5 and the 4th TVS pipe D6.The interface end U5 includes first interface pin d1, second interface pin
D2, third interface pin d3 and the 4th interface pin d4.The first interface pin d1 of the interface end U5 passes through the 4th electricity
Resistance R4 is connected with the cathode of the input terminal I1 and the first TVS pipe D3, the plus earth of the first TVS pipe D3.It is described
The second interface pin d2 of interface end U5 passes through the 5th resistance R5 and the first output end O1 and the second TVS pipe D4
Cathode be connected, the plus earth of the second TVS pipe D4.The third interface pin d3 of the interface end U5 passes through the described 6th
Resistance R6 is connected with the cathode of the 4th input terminal I4 and the third TVS pipe D5, and the anode of the third TVS pipe D5 connects
Ground.The 4th interface pin d4 of the interface end U5 passes through the 7th resistance R7 and the third output end O3 and the described 4th
The cathode of TVS pipe D6 is connected, the plus earth of the 4th TVS pipe D6.
The 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, described first
TVS pipe D3, the second TVS pipe D4, the third TVS pipe D5 and the 4th TVS pipe D6 are for protecting first level
The conversion chip U1 and second electrical level conversion chip U2, avoids moment big voltage to the first electrical level transferring chip U1 and institute
Second electrical level conversion chip U2 is stated to damage.
The working principle of the compound serial port circuit will be illustrated below.
When the serial equipment of the first communications protocol is connect with the interface end U5, the first electrical level transferring chip U1's
Pin A receives the first interface level signal of the first interface pin d1 of the interface end U5, first electrical level transferring chip
The first interface level signal is converted into predetermined level signal and is transmitted to the first input end with door U4 by U1, together
When, the second electrical level conversion chip U2 controls the pin R1OUT and exports high level to described with door U4 the second input terminal,
The reception pin A4 that the predetermined level signal to the main control chip U3 is transmitted with door U4 output end.When the second communication
When the serial equipment of agreement is connect with the interface end U5, connect described in the pin R2IN reception of the second electrical level conversion chip U2
The second interface level signal of the third interface pin d3 of mouthful end U5, the second electrical level conversion chip U2 is by the second interface
Level signal is converted into predetermined level signal and is transmitted to second input terminal with door U4, first input with door U4
End the predetermined level signal is transmitted to the master by the first power supply V1 input high level, the output end with door U4
Control the reception pin A4 of chip U3.
When the control module 30 is not received by the predetermined level signal and the control module 30 needs to transmit number
According to when, the control pin C1 passes through the pin RE and pin DE of the first electrical level transferring chip U1 control first level
Conversion chip U1 is in transmission state, and the control module 30 sends data to the pin of the first electrical level transferring chip U1
The pin T2IN of D1 and the second electrical level conversion chip U2, and by the pin B of the first electrical level transferring chip U1 and
The pin T2OUT of the second electrical level conversion chip U2 is transmitted to the interface module 10.
It should be noted that the control module 30 understands simultaneous transmission to first electrical level transferring chip when transmitting data
The U1 and second electrical level conversion chip U2, the serial equipment connecting with the interface module 10 can receive data.
One interface module 10 is applied to a port, and the level switch module 20 can also include multiple with described the
One level conversion unit 21 and 22 function of second electrical level converting unit are identical, and the identical or different other level of structure turn
Block is changed the mold, the interface end U5 further includes different from first level conversion unit 21 and the second electrical level converting unit 22
The connection of other level switch modules interface pin, the level switch module connecting with the interface end U5 is by interface level
Signal is converted into predetermined level signal and is transmitted to an input terminal with door U4, and the transmission of remaining level switch module is high
Level is compatible with the serial equipment of different communications protocol with this to described and other input terminals of door U4.The compound serial port circuit
It may include multiple interface modules 10.
The compound serial port circuit of the utility model corresponds to the level turn of the serial equipment of different communications protocol by being arranged
Change the mold block, multiple and different interface level signals of receiving interface module, and by receive every time interface level signal
It is converted into predetermined level signal, predetermined level signal is also transmitted to control module, the data that control module can also be transmitted
It is transmitted to interface module, control module and the serial equipment of different communications protocol are communicated, compatibility is strong, circuit
Structure is simple.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (9)
1. a kind of compound serial port circuit, which is characterized in that including interface module, level switch module and control module, the electricity
Flat conversion module is connected with the interface module and the control module；The level switch module can receive the interface mould
Multiple and different interface level signals of block, and receive every time interface level signal is converted into predetermined level letter
Number；The predetermined level signal is also transmitted to the control module by the level switch module；When the control module does not have
When receiving the predetermined level signal, the control module can transfer data to described connect by the level switch module
Mouth mold block.
2. compound serial port circuit according to claim 1, which is characterized in that the level switch module includes the first level
Converting unit and second electrical level converting unit；First level conversion unit is used to receive the first interface of the interface module
Level signal, and the first interface level signal received is converted into predetermined level signal, first level conversion unit
The predetermined level signal is also transmitted to the control module.
3. compound serial port circuit according to claim 2, which is characterized in that first level conversion unit includes first
Electrical level transferring chip, the first power supply and first resistor；First electrical level transferring chip is equipped with pin A, pin B, pin R0, draws
Foot D1, pin RE and pin DE；The pin A of first electrical level transferring chip connect with first input end I1, pin B and first
Output end O1 is connected, and the first input end I1 and the first output end O1 are connected with the interface module；
The pin R0 of first electrical level transferring chip is connected with second output terminal O2, the pin of first electrical level transferring chip
D1 is connected with the second input terminal I2, and the pin RE and pin DE of first electrical level transferring chip are connected with third input terminal I3,
The second input terminal I2, the third input terminal I3 and the second output terminal O2 are connected with the control module；Described
The pin R0 of one electrical level transferring chip is also connected by the first resistor with first power supply.
4. compound serial port circuit according to claim 3, which is characterized in that the second electrical level converting unit is for receiving
The second interface level signal of the interface module, and the second interface level signal received is converted into predetermined level letter
Number, the predetermined level signal is also transmitted to the control module by the second electrical level converting unit.
5. compound serial port circuit according to claim 4, which is characterized in that the second electrical level converting unit includes second
Electrical level transferring chip；The second electrical level conversion chip is equipped with pin R2IN, pin T2OUT, pin R1OUT and pin T2IN；
The pin R2IN of the second electrical level conversion chip is connect with the 4th input terminal I4, pin T2OUT is connected with third output end O3,
The 4th input terminal I4 and the third output end O3 are connected with the interface module；The second electrical level conversion chip draws
Foot R1OUT connect pin T2IN with the 4th output end O4 and is connected with the second input terminal I2, the 4th output end O4 and the control
Molding block is connected.
6. compound serial port circuit according to claim 5, which is characterized in that the control module include main control chip and with
Door；The main control chip includes receiving pin and transmission pin；The first input end and the second output terminal O2 with door
It is connected, described to be connected with the second input terminal of door with the 4th output end O4, the output end and the master control core with door
The reception pin of piece is connected；The transmission pin of the main control chip is connected with the second input terminal I2.
7. compound serial port circuit according to claim 6, which is characterized in that the main control chip further includes control pin；
The control pin of the main control chip is connected with the third input terminal I3；When the control module is not received by described preset
Level signal and when the control module needs to transfer data to first electrical level transferring chip, the control pin is for leading to
The pin RE and pin DE for crossing first electrical level transferring chip control first electrical level transferring chip and are in transmission state, institute
The pin D1 that control module sends data to first electrical level transferring chip is stated, and passes through first electrical level transferring chip
It is transmitted to the interface module.
8. compound serial port circuit according to claim 7, which is characterized in that the main control chip further includes that the first instruction is drawn
Foot and the second instruction pin；The control module further includes the first light emitting diode, the second light emitting diode, second resistance and
Three resistance；First instruction pin of the main control chip is connected with the cathode of first light emitting diode, and described first shines
The anode of diode is connected by the second resistance with first power supply, the second instruction pin of the main control chip and institute
The cathode for stating the second light emitting diode is connected, and the anode of second light emitting diode passes through the 3rd resistor and described first
Power supply is connected.
9. compound serial port circuit according to claim 8, which is characterized in that the interface module includes interface end, the 4th
Resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first TVS pipe, the second TVS pipe, third TVS pipe and the 4th TVS pipe；It is described
Interface end includes first interface pin, second interface pin, third interface pin and the 4th interface pin；The of the interface end
One interface pin is connected by the 4th resistance with the cathode of the input terminal and first TVS pipe, first TVS pipe
Plus earth；The second interface pin of the interface end passes through the 5th resistance and first output end and described second
The cathode of TVS pipe is connected, the plus earth of second TVS pipe；The third interface pin of the interface end passes through the described 6th
Resistance is connected with the cathode of the 4th input terminal and the third TVS pipe, the plus earth of the third TVS pipe；It is described to connect
The cathode phase that 4th interface pin at mouth end passes through the 7th resistance and the third output end O3 and the 4th TVS pipe
Even, the plus earth of the 4th TVS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821254101.1U CN208636823U (en) | 2018-08-06 | 2018-08-06 | Compound serial port circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821254101.1U CN208636823U (en) | 2018-08-06 | 2018-08-06 | Compound serial port circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208636823U true CN208636823U (en) | 2019-03-22 |
Family
ID=65740926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821254101.1U Expired - Fee Related CN208636823U (en) | 2018-08-06 | 2018-08-06 | Compound serial port circuit |
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| Country | Link |
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| CN (1) | CN208636823U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114785869A (en) * | 2022-06-20 | 2022-07-22 | 陕西中测智能科技有限公司 | RS 232-to-one-wire protocol module and conversion method |
-
2018
- 2018-08-06 CN CN201821254101.1U patent/CN208636823U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114785869A (en) * | 2022-06-20 | 2022-07-22 | 陕西中测智能科技有限公司 | RS 232-to-one-wire protocol module and conversion method |
| CN114785869B (en) * | 2022-06-20 | 2022-11-25 | 陕西中测智能科技有限公司 | RS 232-to-one-wire protocol module and conversion method |
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