This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Hi
We use SN65HVD3082EDR to convert UART to RS485But why the signal is abnormal
Please help clarify the problem
CH2 : RS-485 input (pin6 and pin7)
CH3 : Enable signal (pin2 and pin3)
CH4 : UART output signal (pin1)
Schematic as below
您好，
RS485总线上有几个节点？您是否连接了终端电阻RT？
关于失效保护偏置电路，请参考下面FAQ:
https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1042936/sn65hvd3082e-faq-external-pull-up-pull-down-resistors-for-sn65hvd3082e/3857900?tisearch=e2e-sitesearch&keymatch=SN65HVD3082E%20%20Failsafe#3857900
目前線上有二個節點, 有試過加上終端電阻, 情況一樣
您拆掉R17和R21，再看信号是否正常？
