CN216697257U - Single-wire asynchronous serial communication circuit realized by photoelectric coupler - Google Patents
Single-wire asynchronous serial communication circuit realized by photoelectric coupler Download PDFInfo
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- CN216697257U CN216697257U CN202123312991.1U CN202123312991U CN216697257U CN 216697257 U CN216697257 U CN 216697257U CN 202123312991 U CN202123312991 U CN 202123312991U CN 216697257 U CN216697257 U CN 216697257U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The utility model discloses a circuit for realizing single-wire asynchronous serial communication by using a photoelectric coupler, which relates to the field of electronic information, and comprises the following components: a power supply module for supplying a DC voltage; the first system signal sending module is used for sending signals to the second system signal receiving and sending module; the first system signal receiving module is used for receiving the signals sent by the second system signal receiving and sending module; a second system receiving and transmitting signal module for receiving and transmitting signals through a port; the power supply module is connected with the first system signal sending module, the first system signal receiving module and the second system signal receiving and sending module, compared with the prior art, the utility model has the advantages that: compared with the prior circuit, the utility model reduces the number of the used signal lines by half, only uses one signal line for receiving and transmitting signals, and is suitable for occasions which can not provide two signal lines for communication.
Description
Technical Field
The utility model relates to the field of electronic information, in particular to a circuit for realizing single-wire asynchronous serial communication by using a photoelectric coupler.
Background
Asynchronous serial communication is serial data transmission in which both parties of communication use one character (including a specific additional bit) as a data transmission unit, and the interval time for transmitting the character at the transmitting side is not necessarily constant, and which has irregular data segment transmission characteristics.
Existing asynchronous serial communications typically require two signal lines, one for Transmit (TX) and the other for Receive (RX). Some systems needing communication do not have the condition of providing two signal lines, communication interaction is difficult to complete, and improvement is needed.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a single-wire asynchronous serial communication circuit implemented by using a photoelectric coupler, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the utility model provides the following technical scheme:
a single-wire asynchronous serial communication circuit implemented using a photo-coupler, comprising:
the power supply module is used for supplying direct-current voltage;
the first system signal sending module is used for sending signals to the second system signal receiving and sending module;
the first system signal receiving module is used for receiving the signals sent by the second system signal receiving and sending module;
the second system receives and sends the signal module, is used for receiving and sending the signal through a port;
the power supply module is connected with the first system signal sending module, the first system signal receiving module and the second system signal receiving and sending module, the first system signal sending module is connected with the second system signal receiving and sending module, and the second system signal receiving and sending module is connected with the first system signal receiving module.
As a still further scheme of the utility model: the power supply module comprises a voltage VCC, a resistor R1, a resistor R2 and a resistor R3, the voltage VCC is connected with the resistor R1, the resistor R2 and the resistor R3, the other end of the resistor R1 is connected with the first system signal receiving module, the other end of the resistor R2 is connected with the second system signal receiving and transmitting module, and the other end of the resistor R3 is connected with the first system signal transmitting module.
As a still further scheme of the utility model: the first system signal transmitting module comprises a port TX, an inverter U1C and a resistor R4, wherein the port TX is connected with the power supply module and the input end of the inverter U1C, the output end of the inverter U1C is connected with a resistor R4, and the other end of the resistor R4 is connected with the second system signal receiving and transmitting module.
As a still further scheme of the utility model: the first system signal receiving module comprises a port RX, an inverter U1A and an inverter U1B, wherein the port RX is connected with the output end of the inverter U1A, the input end of the inverter U1A is connected with the output end of the inverter U1B, and the input end of the inverter U1B is connected with the power supply module and the second system signal receiving and transmitting module.
As a still further scheme of the utility model: the second system receives signal module and receives includes opto-coupler E1, opto-coupler E2, port IO, No. 2 pins of opto-coupler E1 are connected to port IO, No. 4 pins of opto-coupler E2, No. 1 pin of opto-coupler E1 connects the power supply module, first system signal receiving module is connected to No. 4 pins of opto-coupler E1, No. 3 pins ground connection of opto-coupler E1, first system signal sending module is connected to No. 1 pin of opto-coupler E2, No. 2 pins ground connection of opto-coupler E2, No. 3 pins ground connection of opto-coupler E2.
Compared with the prior art, the utility model has the beneficial effects that: compared with the prior circuit, the utility model reduces the number of the used signal lines by half, only uses one signal line for receiving and transmitting signals, and is suitable for occasions which can not provide two signal lines for communication.
Drawings
Fig. 1 is a circuit diagram of a single-wire asynchronous serial communication circuit implemented by using a photoelectric coupler.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 1, a circuit for implementing single-wire asynchronous serial communication by using a photoelectric coupler includes:
a power supply module for supplying a DC voltage;
the first system signal sending module is used for sending signals to the second system signal receiving and sending module;
the first system signal receiving module is used for receiving the signals sent by the second system signal receiving and sending module;
a second system receiving and transmitting signal module for receiving and transmitting signals through a port;
the power supply module is connected with the first system signal sending module, the first system signal receiving module and the second system signal receiving and sending module, the first system signal sending module is connected with the second system signal receiving and sending module, and the second system signal receiving and sending module is connected with the first system signal receiving module.
In this embodiment: referring to fig. 1, the power supply module includes a voltage VCC, a resistor R1, a resistor R2, and a resistor R3, the voltage VCC is connected to the resistor R1, the resistor R2, and the resistor R3, the other end of the resistor R1 is connected to the first system signal receiving module, the other end of the resistor R2 is connected to the second system signal receiving and transmitting module, and the other end of the resistor R3 is connected to the first system signal transmitting module.
The voltage VCC supplies power to the first system signal receiving module through a resistor R1, the second system signal receiving module through a resistor R2, and the first system signal transmitting module through a resistor R3, so that the port TX is at a high level at the beginning; a pin 1 of the optocoupler E1 is at a high level, so that the port IO is at a high level; the input end of the inverter U1B is at high level, and the port RX is made to be at high level by the optocoupler U1A.
In this embodiment: referring to fig. 1, the first system signal transmitting module includes a port TX, an inverter U1C, and a resistor R4, the port TX is connected to the power supply module and the input end of the inverter U1C, the output end of the inverter U1C is connected to the resistor R4, and the other end of the resistor R4 is connected to the second system signal receiving and transmitting module.
In this embodiment: referring to fig. 1, the first system signal receiving module includes a port RX, an inverter U1A, and an inverter U1B, the port RX is connected to the output terminal of the inverter U1A, the input terminal of the inverter U1A is connected to the output terminal of the inverter U1B, and the input terminal of the inverter U1B is connected to the power supply module and the second system signal receiving and transmitting module.
In this embodiment: please refer to fig. 1, the second system receiving/transmitting signal module includes an optical coupler E1, an optical coupler E2, and a port IO, the port IO is connected to the pin No. 2 of the optical coupler E1 and the pin No. 4 of the optical coupler E2, the pin No. 1 of the optical coupler E1 is connected to the power supply module, the pin No. 4 of the optical coupler E1 is connected to the first system signal receiving module, the pin No. 3 of the optical coupler E1 is grounded, the pin No. 1 of the optical coupler E2 is connected to the first system signal transmitting module, the pin No. 2 of the optical coupler E2 is grounded, and the pin No. 3 of the optical coupler E2 is grounded.
First system signal transmission module sends the signal, and when the second system received the signal receiving module received signal, port TX became the low level, and through inverter U1C make No. 1 pin of opto-coupler E2 be the high level, and opto-coupler E2 switches on for No. 4 pin of opto-coupler E2 becomes the low level, and then makes port IO be the low level, and opto-coupler IO receives the signal.
The second system receives and sends the signal module transmission signal, and when first system signal receiving module received signal, control port IO became the low level for opto-coupler E1 switches on, and inverter U1B's input passes through 4 numbers pin and 3 numbers pin ground connections of opto-coupler E1, makes to become the low level, makes port RX be the low level through inverter U1A.
The TX port and the IO port can send low-level signals to be grounded through the switch, the switch is in a spring-open state under a normal condition, the switch is sprung open when the TX port does not send signals, and the TX port is at a high level; when a low-level signal needs to be sent, the switch is closed, the port TX is grounded and becomes low level, and a low-level signal is sent; and when the port IO sends a low-level signal, the switch is closed, the port IO is grounded and becomes low level, and the low-level signal is sent out.
The working principle of the utility model is as follows: the power supply module supplies direct-current voltage, the first system signal sending module sends signals to the second system signal receiving and sending module, the first system signal receiving module receives signals sent by the second system signal receiving and sending module, and the second system signal receiving and sending module receives and sends signals through one port, so that two ports are not needed to receive and send signals respectively, and the applicability is wider.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A circuit for realizing single-wire asynchronous serial communication by using a photoelectric coupler is characterized in that:
the circuit for realizing single-wire asynchronous serial communication by using the photoelectric coupler comprises:
a power supply module for supplying a DC voltage;
the first system signal sending module is used for sending signals to the second system signal receiving and sending module;
the first system signal receiving module is used for receiving the signals sent by the second system signal receiving and sending module;
a second system receiving and transmitting signal module for receiving and transmitting signals through a port;
the power supply module is connected with the first system signal sending module, the first system signal receiving module and the second system signal receiving and sending module, the first system signal sending module is connected with the second system signal receiving and sending module, and the second system signal receiving and sending module is connected with the first system signal receiving module.
2. The circuit for implementing single-wire asynchronous serial communication by using the photoelectric coupler of claim 1, wherein the power supply module comprises a voltage VCC, a resistor R1, a resistor R2, and a resistor R3, the voltage VCC is connected with the resistor R1, the resistor R2, and the resistor R3, the other end of the resistor R1 is connected with the first system signal receiving module, the other end of the resistor R2 is connected with the second system signal receiving and transmitting module, and the other end of the resistor R3 is connected with the first system signal transmitting module.
3. The single-wire asynchronous serial communication circuit implemented by the photoelectric coupler of claim 1, wherein the first system signal transmitting module comprises a port TX, an inverter U1C and a resistor R4, the port TX is connected with the power supply module and the input end of the inverter U1C, the output end of the inverter U1C is connected with the resistor R4, and the other end of the resistor R4 is connected with the second system signal receiving and transmitting module.
4. The single-wire asynchronous serial communication circuit implemented by the photoelectric coupler of claim 1, wherein the first system signal receiving module comprises a port RX, an inverter U1A and an inverter U1B, the port RX is connected to the output terminal of the inverter U1A, the input terminal of the inverter U1A is connected to the output terminal of the inverter U1B, and the input terminal of the inverter U1B is connected to the power supply module and the second system signal receiving and transmitting module.
5. The circuit for realizing single-wire asynchronous serial communication by using the photoelectric coupler as claimed in claim 3, wherein the second system signal receiving and transmitting module comprises an optical coupler E1, an optical coupler E2 and a port IO, the port IO is connected with a pin No. 2 of the optical coupler E1 and a pin No. 4 of the optical coupler E2, a pin No. 1 of the optical coupler E1 is connected with a power supply module, a pin No. 4 of the optical coupler E1 is connected with the first system signal receiving module, a pin No. 3 of the optical coupler E1 is grounded, a pin No. 1 of the optical coupler E2 is connected with the first system signal transmitting module, a pin No. 2 of the optical coupler E2 is grounded, and a pin No. 3 of the optical coupler E2 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123312991.1U CN216697257U (en) | 2021-12-27 | 2021-12-27 | Single-wire asynchronous serial communication circuit realized by photoelectric coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123312991.1U CN216697257U (en) | 2021-12-27 | 2021-12-27 | Single-wire asynchronous serial communication circuit realized by photoelectric coupler |
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| CN216697257U true CN216697257U (en) | 2022-06-07 |
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| CN202123312991.1U Active CN216697257U (en) | 2021-12-27 | 2021-12-27 | Single-wire asynchronous serial communication circuit realized by photoelectric coupler |
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| CN (1) | CN216697257U (en) |
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- 2021-12-27 CN CN202123312991.1U patent/CN216697257U/en active Active
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