An Application System of Single Chip Microcomputer Serial Port Communication Circuit

Abstract

The application system of a single-chip microcomputer serial port communication circuit provided by the invention mainly solves the problems in the prior art that the single-chip microcomputer cannot be powered on and reset due to power feeding through the serial port, and the work is unreliable. The system includes an external serial port data transmitting terminal Tx+, an external serial port data transmitting terminal Tx-, a transceiver and a single-chip microcomputer, and the transceiver is provided with an external data receiving terminal Rx+ and an external data receiving terminal Rx-; the transceiver is also provided with a data The output terminal Rx, the external serial port data transmitting terminal Tx+ is connected to the external data receiving terminal Rx-; the external serial port data transmitting terminal Tx- is connected to the external data receiving terminal Rx+; the transceiver and the microcontroller are connected to the data output terminal Rx output A logic negation circuit for data negation; the data output terminal Rx is connected to the data receiving terminal of the logic negation circuit; the data receiving terminal RxD of the single-chip microcomputer is connected to the data output terminal of the logic negation circuit.

Description

technical field [0001] The invention relates to a single-chip microcomputer application system, in particular to a single-chip microcomputer serial port communication circuit application system. Background technique [0002] In the single-chip application system, in order to enable the single-chip to communicate with the computer or other single-chip, a Universal Asynchronous Receiver Transmitter (UART) is integrated inside the single-chip, that is, a serial port. With the development of single-chip microcomputer, the serial port has gradually become an indispensable part of single-chip microcomputer. [0003] Single-chip microcomputers are mostly used in communication systems. Communication systems generally require both communication quality and reliability. This requires reliable power-on reset control for single-chip microcomputers working in communication systems to meet the high reliability requirements of communication equipment. [0004] Most of the serial port circ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a single-chip microcomputer serial port communication circuit application system to solve the problems in the prior art that the single-chip microcomputer cannot be powered on and reset due to the serial port power supply, and the work is unreliable

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