Serial communication interface function switching circuit and method

A serial communication interface and function switching technology, applied in the field of circuit communication, can solve the problems of consuming CPU multi-channel serial port resources, manually switching analog switches, etc.

Active Publication Date: 2017-08-18
GUANGZHOU ZHIYUAN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] The embodiment of the present invention provides a serial communication interface function switching circuit and method, which are used to solve the technical problem of consuming CPU multi-channel serial port resources or requiring manual switching or using expensive analog switches to realize multi-functional serial communication

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  • Serial communication interface function switching circuit and method
  • Serial communication interface function switching circuit and method
  • Serial communication interface function switching circuit and method

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Embodiment Construction

[0089] The embodiment of the present invention provides a serial communication interface function switching circuit and method, which are used to solve the technical problem of consuming CPU multi-channel serial port resources or requiring manual switching or using expensive analog switches to realize multi-functional serial communication.

[0090] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention....

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Abstract

The invention discloses a serial communication interface function switching circuit and method and is used for solving the technical problem that for realization of multifunctional serial communication, CPU multiway serial resources need to be consumed or manual switching needs to be carried out or an expensive analog switch is adopted. The embodiment of the invention comprises a first receiving control circuit, a first transmitting control circuit, a second receiving control circuit, a second transmitting control circuit, a mode switching signal interface, a first transmitting and receiving control signal interface, a first receiving enabling signal interface, a first transmitting enabling signal interface, a second receiving enabling signal interface and a second transmitting enabling signal interface. An MCU can convert functions of a first level conversion chip and a second level conversion chip by controlling the high and low levels of the mode switching signal interface and the first transmitting and receiving control signal interface. The technical effect that a serial port has a plurality of functions is realized, and the technical problem that for realization of multifunctional serial communication, the CPU multiway serial resources need to be consumed is solved.

Description

technical field [0001] The invention relates to the field of circuit communication, in particular to a serial communication interface function switching circuit and method. Background technique [0002] There are two ways of serial communication and parallel communication for data transmission between computers or between computers and terminals. Because the serial communication method has fewer lines and low cost, especially in long-distance transmission, it avoids the inconsistency of the characteristics of multiple lines and is widely used. In serial communication, both communication parties are required to adopt a standard interface, so that different devices can be easily connected for communication. [0003] RS-232-C interface (also known as EIARS-232-C) is the most commonly used serial communication interface at present. It is a standard for serial communication jointly developed by the Electronic Industries Association (EIA) in conjunction with Bell System, modem m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/0175G06F13/40
CPCH03K19/017509G06F13/4068G06F2213/0002Y02D10/00
Inventor 周立功赵志华程溪
Owner GUANGZHOU ZHIYUAN ELECTRONICS CO LTD
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