在噪声环境中,如何增加端口的驱动能力,弱化噪声的影响?例如在端口上增加下拉电阻是否可行。
您好
For device reliability, following common printed-circuit board layout guidelines is recommended. • Bypass capacitors should be used on power supplies. • Short trace lengths should be used to avoid excessive loading. • PCB signal trace-lengths must be kept short enough so that the round-trip delay of any reflection is less than the one shot duration, approximately 30 ns, and encounters low impedance at the source driver. • Placing pads on the signal paths for loading capacitors or pullup resistors to help adjust rise and fall times of signals depending on the system requirements
这是datasheet对于这部分布局指导
关于上拉等请您参考官方如下参考设计。
https://www.ti.com.cn/tool/cn/TIDA-00403
最后在您的测试环境中如果出现高低频造成可以参考实际情况添加阻容来进行滤波等操作。