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Synchronous serial communication interface device

A synchronous serial communication and interface device technology, applied in general control systems, instruments, computer control, etc., to achieve stable and reliable work, easy development and use, and simple structure.

Inactive Publication Date: 2013-12-18
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The advantage of asynchronous communication is that no synchronous clock signal is required, but this will cause the problem of determining the communication baud rate. For this reason, the communication master and slave must send and receive data at the same baud rate, that is, a wave is required between the two. Rate negotiation mechanism for correct data transmission

Method used

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Embodiment Construction

[0030] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0031] The hardware structure on which the present invention is based is as figure 1 As shown, a general structure block diagram of a synchronous serial communication interface; it mainly includes the following three parts: a main control unit 101, a synchronous clock receiving unit 102, and a synchronous data output unit 103.

[0032] in,

[0033] Main control unit 101:

[0034] It is composed of a microprocessor 1011 and a user interface 1012, wherein the microprocessor 1011 adopts the STC12C5A60S2 microcontroller of STC Company; the main control unit 101, according to the synchronous clock signal received by the synchronous clock receiving unit 102, sends external devices The data of asynchronous serial output or parallel output is converted into synchr...

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Abstract

A synchronous serial communication interface device comprises three parts, namely a master control unit, a synchronous clock receiving unit and a synchronous data output unit. According to a synchronous clock signal, received asynchronous serial data or parallel data are converted into synchronous serial differential data which are output; the synchronous clock receiving unit is used for converting a received synchronous clock differential signal into a single-ended signal and transmitting the single-ended signal to the master control unit; the synchronous data output unit is used for differencing of synchronous data output by the master control unit so as to improve the anti-interference performance in the data transmission process. The synchronous serial communication interface device has quite strong practicability; by means of being connected with the synchronous serial communication interface device, external devices which are subjected to asynchronous serial output or parallel output can achieve the synchronous serial communication function, and therefore the application range of the synchronous serial communication interface device is expanded to a large extent.

Description

technical field [0001] The invention belongs to the field of industrial serial communication, in particular to a synchronous serial communication interface device with wide versatility. Background technique [0002] For serial communication, according to its data transmission mode, it can be divided into two forms: asynchronous serial communication and synchronous serial communication. Among them, asynchronous communication uses a specific frequency to sample the input data, and determines the data according to the change of the sampling result. To increase the transmission rate, the sampling speed must be increased. The advantage of asynchronous communication is that no synchronous clock signal is required, but this will cause the problem of determining the communication baud rate. For this reason, the communication master and slave must send and receive data at the same baud rate, that is, a wave is required between the two. Baud rate negotiation mechanism for correct da...

Claims

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Application Information

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IPC IPC(8): G05B19/042
Inventor 陈在平贾超倪建云陈志同
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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