对于RS485/RS422全双工通讯时，当总线上带有多个从机器件时，要确保在任何时刻只有一个从机来驱动总线，也就是说要对从机的发送使能信号进行控制，当不发送数据时要将从机驱动器禁止，如果多个从机同时驱动总线，会造成总线的数据冲突导致接收端无法判断正确的数据帧，因此也就不会产生中断信号，建议将MAX3140的RST引脚和DE引脚连接在一起，通过寄存器控制RST引脚的电平来控制发送器的使能。
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KCC's Quizzes AQQ304 - A pure logic
1. Quote of the month: "I am not lazy, I'm just in energy-saving mode" - unknown
2. Quiz AQQ304 about finding a pure logic puzzle
Mike is looking at Anne, but Anne is looking at Paul.
Mike is married, but Paul is not.
Question:
Is a married
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September Monthly Blog Quiz! Read the blog, take the quiz, and you could win a gift card
Quiz: How Well Do You Know Adaptive Power Switching?
Is your I/O module overheating? The AD74416H's Adaptive Power Switching (APS) can cut heat dissipation by up to 40% — but how well do you really understand how it works?
Read the blog first: Cooling
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