CN217825383U

CN217825383U - 433M communication circuit

Info

Publication number: CN217825383U
Application number: CN202221845202.2U
Authority: CN
Inventors: 袁礼刚; 江冠华; 金乃庆; 朱宗卫; 江石根
Original assignee: Jiangsu Jwt Electronics Shares Co ltd
Current assignee: Jiangsu Jwt Electronics Shares Co ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2022-11-15
Anticipated expiration: 2032-07-18

Abstract

The utility model provides a 433M communication circuit, including keeping apart power supply circuit, interface circuit, the MCU circuit, the procedure burns record the interface, radio frequency circuit, antenna output interface, keep apart power supply circuit output and interface circuit input and be connected, the interface circuit output is connected with the input of MCU circuit, the output and the radio frequency circuit input of MCU circuit are connected, radio frequency circuit output and antenna output interface connection, procedure burns record interface and MCU circuit both way junction, power isolation circuit is used for keeping apart 3V3 power and RF3V3 power, the MCU circuit carries out AT function switch through MCU chip U2, the procedure burns record the interface and is used for burning record or/and read the control program in MCU chip U2 and support online debugging, be connected with radio frequency circuit through the MCU circuit, MCU chip U2 exports the AT instruction, carry out the dormancy through the AT instruction, the standby, receive, the switch of four kinds of functions of transmission, the production demand has been satisfied, the functional interface is abundant, circuit structure is simple.

Description

433M communication circuit

Technical Field

The utility model relates to an electricity field, more specifically relates to a 433M communication circuit.

Background

The wireless transmission includes: WIFI communication, bluetooth communication, 2.4G communication, zigbee communication, Z-wave communication, 433M communication etc. current 433M communication circuit uses serial ports and radio frequency circuit to be connected and carries out data transmission, and the function is single, can't satisfy current multi-functional mode switching demand.

In view of this, the utility model provides a 433M communication circuit, functional interface is abundant, and the circuit is simple, can carry out multi-functional mode switch through the MCU chip.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a 433M communication circuit, the function interface is abundant, and the circuit is simple, can carry out multi-functional mode switch through the MCU chip.

A 433M communications circuit comprising: the isolation power supply circuit, interface circuit, the MCU circuit, the interface is burnt to the procedure, the radio frequency circuit, antenna output interface, isolation power supply circuit output is connected with interface circuit input, interface circuit output is connected with the input of MCU circuit, the output and the radio frequency circuit input of MCU circuit are connected, radio frequency circuit output and antenna output interface are connected, the interface is burnt to the procedure and MCU circuit both way junction, power isolation circuit is used for keeping apart 3V3 power and RF3V3 power, the MCU circuit carries out AT function through MCU chip U2 and switches, the interface is burnt to the procedure and is used for burning or/and reading the control program in MCU chip U2 and support online debugging.

Further, the interface circuit is connected with the MCU circuit in a bidirectional mode, the interface circuit is in bidirectional signal transmission with an MCU chip U2 of the MCU circuit, 4 pins of the interface circuit are connected with 5 pins of the MCU chip U2, and 5 pins of the interface circuit are connected with 6 pins of the MCU chip U2.

Furthermore, the interface circuit is further connected with a stable power supply circuit, the stable power supply circuit comprises an ESD diode D2 and a capacitor C24, a pin 2 of the interface circuit is connected with the ESD diode D2 and the capacitor C24, the ESD diode D2 is used for preventing static electricity when the 3V3 power supply is grounded, and the capacitor C24 is used for storing energy and providing energy when the 3V3 power supply fluctuates.

Further, the radio frequency circuit comprises a radio frequency chip U1 and a first radio frequency circuit, wherein the output end of the radio frequency chip U1 is connected with the input end of the first radio frequency circuit, the output end of the first radio frequency circuit is connected with the antenna output interface, the radio frequency chip U1 is used for receiving the output data of the MCU circuit, and the first radio frequency circuit is used for filtering and coupling.

Further, the radio frequency chip U1 is further connected to a crystal oscillator circuit for providing a circuit clock signal to the radio frequency circuit, pins 6 of the radio frequency chip U1 are connected to an output end of the crystal oscillator circuit, and pins 7 of the radio frequency chip U1 are connected to an input end of the crystal oscillator circuit.

Furthermore, the MCU circuit also comprises a power-on reset circuit, wherein a pin 4 of the MCU chip U2 is connected with the reset circuit, the reset circuit consists of a resistor R1 and a capacitor C22, a pin 8 of the MCU chip U2 is connected with a capacitor C23, and the capacitor C23 plays a role in filtering.

Further, the MCU chip U2 is also connected with a configuration interface, the configuration interface is connected with

pins

14 and 15 of the MCU chip U2, and the configuration interface is used for configuring a control program in the MCU chip U2.

Further, MCU chip U2's 10 feet, 11 feet, 19 feet, 20 feet are first SPI interface, be used for receiving, send data, radio frequency chip U1's 2 feet, 3 feet, 4 feet, 5 feet are the second SPI interface, be used for receiving, send data, first SPI interface and second SPI interface both way junction, MCU chip U2's 10 feet and radio frequency chip U1's 5 feet are connected, MCU chip U2's 11 feet and radio frequency chip U1's 4 feet are connected, MCU chip U2's 19 feet and radio frequency chip U1's 2 feet are connected, MCU chip U2's 20 feet and radio frequency chip U1's 3 feet are connected.

Further, the program burning interface is connected with

pins

17 and 18 of the MCU chip U2.

The utility model has the advantages that: the utility model provides a 433M communication circuit, including keeping apart power supply circuit, interface circuit, the MCU circuit, the procedure burns record the interface, radio frequency circuit, antenna output interface, keep apart power supply circuit output and interface circuit input and be connected, the interface circuit output is connected with the input of MCU circuit, the output and the radio frequency circuit input of MCU circuit are connected, radio frequency circuit output and antenna output interface connection, procedure burns record interface and MCU circuit both way junction, power isolation circuit is used for keeping apart 3V3 power and RF3V3 power, the MCU circuit carries out AT function switch through MCU chip U2, the procedure burns record the interface and is used for burning record or/and read the control program in MCU chip U2 and support online debugging, be connected with radio frequency circuit through the MCU circuit, MCU chip U2 exports the AT instruction, carry out the dormancy through the AT instruction, the standby, receive, the switch of four kinds of functions of transmission, the production demand has been satisfied, the functional interface is abundant, circuit structure is simple.

Drawings

Fig. 1 is a circuit diagram of an MCU circuit and a program burning interface of the 433M communication circuit of the present application.

Fig. 2 is a circuit diagram of an interface circuit and an isolated power supply circuit of the 433M communication circuit of the present application.

Fig. 3 is a circuit diagram of the rf circuit and the antenna output interface of the 433M communication circuit of the present application.

Fig. 4 is a circuit diagram of a crystal oscillator circuit of the 433M communication circuit according to the present application.

The drawings are described in detail below with reference to specific embodiments.

Detailed Description

The following examples are described to aid in the understanding of the present application and are not, and should not be, construed to limit the scope of the present application in any way.

In the following description, those skilled in the art will recognize that components may be described throughout this discussion as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including being integrated within a single system or component).

Also, connections between components or systems are not intended to be limited to direct connections, but rather, data between these components may be modified, reformatted, or otherwise changed by intervening components. Additionally, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections.

Example 1:

a 433M communications circuit, as shown in fig. 1-4, comprising: the isolation power supply circuit, the interface circuit, the MCU circuit, the program burns record interface, the radio frequency circuit, antenna output interface, isolation power supply circuit output is connected with the interface circuit input, the interface circuit output is connected with the input of MCU circuit, the output of MCU circuit is connected with radio frequency circuit input, radio frequency circuit output is connected with antenna output interface, the program burns record interface and MCU circuit both way junction, power isolation circuit is used for keeping apart 3V3 power and RF3V3 power, the MCU circuit carries out AT function switch through MCU chip U2, the program burns record interface is used for burning record or/and reading the control program in MCU chip U2 and support online debugging.

The interface circuit is connected with the MCU circuit in a two-way mode, the interface circuit is in signal two-way transmission with an MCU chip U2 of the MCU circuit, 4 pins of the interface circuit are connected with 5 pins of the MCU chip U2, and 5 pins of the interface circuit are connected with 6 pins of the MCU chip U2.

The interface circuit is further connected with a stable power supply circuit, the stable power supply circuit comprises an ESD diode D2 and a capacitor C24, a pin 2 of the interface circuit is connected with the ESD diode D2 and the capacitor C24, the ESD diode D2 is used for preventing static electricity when being grounded for a 3V3 power supply, and the capacitor C24 is used for storing energy and providing energy when the 3V3 power supply fluctuates.

The radio frequency circuit comprises a radio frequency chip U1 and a first radio frequency circuit, wherein the output end of the radio frequency chip U1 is connected with the input end of the first radio frequency circuit, the output end of the first radio frequency circuit is connected with the antenna output interface, the radio frequency chip U1 is used for receiving the output data of the MCU circuit, and the first radio frequency circuit is used for filtering and coupling.

The radio frequency chip U1 is also connected with a crystal oscillator circuit and used for providing a circuit clock signal for the radio frequency circuit, 6 pins of the radio frequency chip U1 are connected with the output end of the crystal oscillator circuit, and 7 pins of the radio frequency chip U1 are connected with the input end of the crystal oscillator circuit.

The MCU circuit also comprises a power-on reset circuit, 4 pins of the MCU chip U2 are connected with the reset circuit, the reset circuit is composed of a resistor R1 and a capacitor C22, 8 pins of the MCU chip U2 are connected with a capacitor C23, and the capacitor C23 plays a role in filtering.

The MCU chip U2 is also connected with a configuration interface, the configuration interface is connected with

pins

MCU chip U2's 10 feet, 11 feet, 19 feet, 20 feet are first SPI interface, a receiving end, send data, radio frequency chip U1's 2 feet, 3 feet, 4 feet, 5 feet are the second SPI interface, a receiving end, send data, first SPI interface and second SPI interface both way junction, MCU chip U2's 10 feet are connected with radio frequency chip U1's 5 feet, MCU chip U2's 11 feet are connected with radio frequency chip U1's 4 feet, MCU chip U2's 19 feet are connected with radio frequency chip U1's 2 feet, MCU chip U2's 20 feet are connected with radio frequency chip U1's 3 feet.

And the program burning interface is connected with

pins

17 and 18 of the MCU chip U2.

While various aspects and embodiments have been disclosed herein, it will be apparent to those skilled in the art that other aspects and embodiments can be made without departing from the spirit of the disclosure, and that several modifications and improvements can be made without departing from the spirit of the disclosure. The various aspects and embodiments disclosed herein are for purposes of illustration only and are not intended to be limiting, with the true scope of the disclosure being indicated by the following claims.

Claims

1. A 433M communication circuit, comprising: the isolation power supply circuit, the interface circuit, the MCU circuit, the program burns record interface, the radio frequency circuit, antenna output interface, isolation power supply circuit output is connected with the interface circuit input, the interface circuit output is connected with the input of MCU circuit, the output of MCU circuit is connected with radio frequency circuit input, radio frequency circuit output is connected with antenna output interface, the program burns record interface and MCU circuit both way junction, power isolation circuit is used for keeping apart 3V3 power and RF3V3 power, the MCU circuit carries out AT function switch through MCU chip U2, the program burns record interface is used for burning record or/and reading the control program in MCU chip U2 and support online debugging.

2. The 433M communication circuit of claim 1, wherein the interface circuit is bidirectionally connected to the MCU circuit, the interface circuit is bidirectionally transmitted with an MCU chip U2 of the MCU circuit, 4 pins of the interface circuit are connected to 5 pins of the MCU chip U2, and 5 pins of the interface circuit are connected to 6 pins of the MCU chip U2.

3. The 433M communication circuit of claim 2, wherein the interface circuit is further connected with a stable power circuit, the stable power circuit comprises an ESD diode D2 and a capacitor C24, a pin 2 of the interface circuit is connected with the ESD diode D2 and the capacitor C24, the ESD diode D2 is used for preventing static electricity when the 3V3 power supply is grounded, and the capacitor C24 is used for storing energy and providing energy when the 3V3 power supply fluctuates.

4. The 433M communication circuit of claim 1, wherein the rf circuit comprises an rf chip U1 and a first rf circuit, an output terminal of the rf chip U1 is connected to an input terminal of the first rf circuit, an output terminal of the first rf circuit is connected to the antenna output interface, the rf chip U1 is configured to receive data output by the MCU circuit, and the first rf circuit is configured to perform filtering and coupling.

5. The 433M communication circuit of claim 4, wherein the RF chip U1 is further connected to a crystal oscillator circuit for providing a circuit clock signal to the RF circuit, wherein pins 6 of the RF chip U1 are connected to an output terminal of the crystal oscillator circuit, and pins 7 of the RF chip U1 are connected to an input terminal of the crystal oscillator circuit.

6. The 433M communication circuit of claim 1, wherein the MCU circuit further comprises a power-on reset circuit, wherein 4 pins of the MCU chip U2 are connected with the reset circuit, the reset circuit is composed of a resistor R1 and a capacitor C22, 8 pins of the MCU chip U2 are connected with a capacitor C23, and the capacitor C23 plays a role of filtering.

7. The 433M communication circuit of claim 1, wherein the MCU chip U2 is further connected to a configuration interface, the configuration interface is connected to pins 14 and 15 of the MCU chip U2, and the configuration interface is configured to configure a control program in the MCU chip U2.

8. The 433M communication circuit of claim 1, wherein pins 10, 11, 19, and 20 of the MCU chip U2 are first SPI interfaces for receiving and transmitting data, pins 2, 3, 4, and 5 of the rf chip U1 are second SPI interfaces for receiving and transmitting data, the first SPI interfaces are bidirectionally connected to the second SPI interfaces, pin 10 of the MCU chip U2 is connected to pin 5 of the rf chip U1, pin 11 of the MCU chip U2 is connected to pin 4 of the rf chip U1, pin 19 of the MCU chip U2 is connected to pin 2 of the rf chip U1, and pin 20 of the MCU chip U2 is connected to pin 3 of the rf chip U1.

9. The 433M communication circuit of claim 1, wherein the program burning interface is connected to pins 17 and 18 of an MCU chip U2.