Multi-serial-port communication crystal oscillator circuit

A crystal oscillator circuit and multi-serial port technology, which is applied in the multi-serial port communication crystal oscillator circuit and serial communication field, can solve problems such as poor electromagnetic compatibility, many expansion chips, and difficult layout of crystal oscillators, so as to reduce quantity requirements, optimize electromagnetic compatibility, and effectively Good for layout design

Inactive Publication Date: 2019-04-16
天津航空机电有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of difficult layout and poor electromagnetic compatibility caused by many serial communication expansion chips and too many configurations of crystal oscillators in the multi-channel serial communication design

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
  • Multi-serial-port communication crystal oscillator circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0017] figure 1 The multi-serial port communication crystal oscillator circuit of the present invention includes multiple serial port expansion circuits and a crystal oscillator circuit. The multiple serial port expansion circuits are composed of multiple serial port expansion chips, and each serial port expansion chip is connected to the crystal oscillator circuit. The multi-serial port expansion circuit is composed of 4 serial port expansion chips SM16C854. The serial port expansion chip is interconnected with the main CPU through the parallel data bus and the address bus to realize data interaction, and the time-sharing strobe communication of multiple serial communication signals is realized through the chip selection signal.

[0018] The crystal oscillator circuit consists of an active crystal oscillator CY1 (FTX1-ELMN / 1.8432MHZ) and 4 peripheral filter ...

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 multi-serial-port communication crystal oscillator circuit which comprises a plurality of serial port expansion circuits and a crystal oscillator circuit. The plurality of serial port expansion circuits are composed of a plurality of serial port expansion chips, and each serial port expansion chip is connected with the crystal oscillator circuit. The crystal oscillator circuit is composed of an active crystal oscillator CY1 and a plurality of peripheral filtering magnetic beads. According to the multi-serial-port communication crystal oscillator circuit, the number requirement of active crystal oscillators is reduced, the layout design of a CPU circuit is facilitated, and the electromagnetic compatibility of the CPU circuit is optimized.

Description

technical field [0001] The invention relates to serial communication, belongs to the field of primary power distribution system, and in particular relates to a multi-serial port communication crystal oscillator circuit. Background technique [0002] Ordinary CPU chips only include one or two serial communication interfaces, but in the primary power distribution system of an aircraft, multiple serial communication interfaces need to be set up to meet the communication interaction requirements on the aircraft. Since the CPU chip is generally large in size, the required The peripheral circuit of the computer is relatively complicated, and a special chip is generally used in conjunction with the CPU to realize the multi-serial communication requirements. [0003] In the prior art, in the use of many serial communication interfaces, it is often necessary to configure multiple serial communication expansion chips to meet the needs. Each serial communication expansion chip is equip...

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): G06F13/38G06F13/40
CPCG06F13/385G06F13/4022G06F2213/0002
Inventor 郝琪伟顾焕涛孙骏
Owner 天津航空机电有限公司
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