Title:
RS485-BASED SINGLE-WIRE HALF-DUPLEX CONVERSION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2023/123823
Kind Code:
A1
Abstract:
Disclosed in the present invention is an RS485-based single-wire half-duplex conversion circuit, comprising: an RS485 differential drive chip, a first serial port pin and a second serial port pin of the RS485 differential drive chip being respectively connected to an RS485 signal input/output end; a first analog comparator, an IN+ pin of the first analog comparator being connected to a UART serial bus, and an output end of the first analog comparator being connected to a third serial port pin; a second analog comparator, an IN-pin of the second analog comparator being connected to a fourth serial port pin of the RS485 differential drive chip, and an output end of the second analog comparator being connected to the UART serial bus; and an RC time locking circuit, a first input end of the RC time locking circuit being connected to the output end of the first analog comparator, a second input end of the RC time locking circuit being connected to an IN-pin of the first analog comparator, the second input end of the RC time locking circuit being further connected to the output end of the second analog comparator, and an output end of the RC time locking circuit being connected to a signal direction control pin of the RS485 differential drive chip.
Inventors:
ZHOU RONG (CN)
WU JINBING (CN)
FAN XIAOZHEN (CN)
WU JINBING (CN)
FAN XIAOZHEN (CN)
Application Number:
PCT/CN2022/092883
Publication Date:
July 06, 2023
Filing Date:
May 13, 2022
Export Citation:
Assignee:
SUZHOU LZY TECH CO LTD (CN)
International Classes:
H04L5/16; G05B19/042; G06F13/38; G06F13/42; H04B3/30
Foreign References:
| CN208636683U | 2019-03-22 | |||
| CN207601789U | 2018-07-10 | |||
| CN210137320U | 2020-03-10 | |||
| CN210639609U | 2020-05-29 | |||
| US20040052219A1 | 2004-03-18 |
Attorney, Agent or Firm:
NANJING ZHONGGAO PATENT AGENCY CO., LTD. (CN)
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