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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1047952/sn65hvd1781-how-will-the-circuit-work-if-re-is-grounded
您好！
如果 RE 接地、电路将如何工作？ 它可以同时用作接收器驱动程序还是仅用作接收器？ 原理图如下所示：
当 DE 为高电平且/RE 为低电平时、驱动器正常工作、总线状态也将在引脚1处输出。 换句话说、RXD = TXD、您的控制器将接收到它发送的内容。
