Long-distance transmission system of SPI (Serial Peripheral Interface) bus data

A long-distance transmission and SPI bus technology, applied in the field of signal transmission system, can solve the problems of data transmission error, noise interference, interference cannot be eliminated or weakened, etc., and achieve the effect of simple structure of the invention, improvement of quality, and expansion of the scope of use

Inactive Publication Date: 2015-04-01
LIUZHOU RAILWAY VOCATIONAL TECHN COLLEGE
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of single-ended unbalanced transmission, the interference introduced into the signal line cannot be eliminated or weakened, and if it is serious, it will cause data transmission errors
In addition, in the single-ended unbalanced transmission mode, a common ground wire is required as a reference point, and the ground wire is also the return line of the signal current, and there is a signal current. When there is an AC potential difference, the AC potential difference will directly jump into the signal, causing noise interference
Based on the above reasons, the transmission distance of SPI bus data is limited to short-distance data transmission at the board and card level

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Long-distance transmission system of SPI (Serial Peripheral Interface) bus data
  • Long-distance transmission system of SPI (Serial Peripheral Interface) bus data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] A kind of SPI bus data long-distance transmission system, comprises transmitter, twisted-pair transmission cable and receiver, described transmitter is connected with receiver by twisted-pair transmission cable, and described transmitter adopts MAX3045 four-way RS- 422 / RS-485 receiver chip, and the receiver is made of MAX3095 four-way RS-422 / RS-485 receiver chip. The twisted-pair transmission cable is an unshielded twisted-pair connection of CAT 5 or CAT 5E level conforming to the TIA / EIA-568B standard.

[0017] The transmitter and the receiver are connected by a twisted pair transmission cable, and the SPI data bus is connected to the three signals of SCLK (clock), MOSI (host transmission), and SS (chip select) at the transmitting end, and the receiving end outputs the corresponding Signal.

[0018] When using, see figure 2 At the sending end, the SPI host (generally a single-chip microcomputer) sends the data of the SPI bus, and through the transmitter, the single-...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a long-distance transmission system of SPI (Serial Peripheral Interface) bus data. The long-distance transmission system comprises a transmitter, a twisted pair transmission cable and a receiver, wherein the transmitter is connected with the receiver through the twisted pair transmission cable; the transmitter comprises four RS-422 / RS-485 transmitter chips of MAX3045; the receiver comprises four RS-422 / RS-485 receiver chips of MAX3095; the twisted pair transmission cable is formed by connection of unshielded twisted pairs of CAT 5 or CAT 5E which meet the TIA / EIA-568B standard. The long-distance transmission system is simple in structure; the reliable transmission distance of the SPI bus data can be extended to be 1200m; the application range of an SPI bus device is greatly expanded.

Description

technical field [0001] The invention relates to a signal transmission system, in particular to an SPI data long-distance transmission system. Background technique [0002] The SPI (Serial Peripheral Interface, Serial Peripheral Interface) bus is a synchronous serial peripheral interface protocol proposed by Motorola, which enables the MCU to communicate with various peripheral devices in a serial manner to exchange information. Because the bus occupies less interface lines, and is fast, it can send and receive at the same time, and the communication efficiency is high. There are many devices supporting this bus, including E 2 PROM, A / D, D / A, real-time clock, and LED, LCD drive devices, etc. [0003] The SPI bus is a widely used short-distance serial synchronous communication protocol. It has many advantages such as simple communication protocol, fast transmission speed, and high communication efficiency. However, its short transmission distance limits the scope of its u...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04B3/30
Inventor 梁德坚刘玉琼万选明刘织财
Owner LIUZHOU RAILWAY VOCATIONAL TECHN COLLEGE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap