RS-485 communication interface polarity detection device, method and chip
A technology of RS-485 and communication interface, which is applied in the field of RS-485 communication interface chip, can solve problems such as difficult implementation and complicated polarity detection method, and achieve the effect of increasing cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment Construction
[0044] The technical solution for implementing the present invention can be divided into two parts: detection and adjustment.
[0045] The polarity detection method can refer to image 3 , Figure 4 and Figure 5 As shown, the specific process is as follows.
[0046] When the RS-485 interface communicates, the differential signal mode on the A and B signal lines is defined by the RS-485 communication protocol. During communication, the start bit of each frame of data is '0', and the logic level of the subsequent address bits, data bits, and parity bits depends on the specific data, and both '0' and '1' are possible. The stop bit is '1' and may last for a long time. Therefore, two time periods can be defined, one is the duration of the start bit, address bit, data bit and parity bit, which is defined as T1. The maximum value of T1 occurs when the number of start bits, address bits, data bits and parity bits is the largest, and the communication code rate is the slowest. As...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com