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LPC1518's phenomenon of abnormal about RS485

Question asked by Shawn Ni on Jul 5, 2019
Latest reply on Jul 12, 2019 by Felipe García

Hi guys;

    I have some questions of RS485, in using NXP's MCU(LPC1518). Specific as follows:


     We configured the RTS signal to provide an output enable signal to control an RS-485 transceiver(USART_CFG[20] = 1).

      But, we found the phenomenon of abnormal that DE would be Low at Sending Data Operation incidentally.It continue about 6us.

      Could you have some suggestions about it ?

      Thank you very much.