使用PCA捕获功能的疑问

jm***

xj3*** 发表于 2024-7-1 18:12
https://www.stcaimcu.com/forum.php?mod=redirect&goto=findpost&ptid=7427&pid=88855
100M频率的周期是 ...

Yes, in your example of 100MHz PCA, each edge has a 10ns window.
However, to  

test the single-bit width of its serial port data.

you need 2 captures, and each has a 10ns uncertainty.

Thus you have a 20ns total uncertainty on your pulse width difference value.

xj3***

jm*** 发表于 2024-7-2 07:33
Yes, in your example of 100MHz PCA, each edge has a 10ns window.
However, to  

楼主说法很严谨