I think comparator is not need for this purpose which connected to P0-1
Just only Pin interruption(fall edge) meet for this.
P0-1 would have resistive pull up drive and before evry sensing the pin value,
Write 1 to this pin.
Hi PSoC73 --
Thanks for your reply. It got me to thinking about the project I/O.
Actually, I do need the comparator UM (or some other UM to serve as an intermediary) because one can't connect the timer UM to the I/O pins directly. I pulled up the "measuring frequency" project (AN2283) and looked at how the I/O from the signal source to the timer was done.
In truth, however, the actual reason my project didn't work is because I forgot to START the COMP UM. Total rookie mistake (shame on me).
So, I used your suggestion about configuring the pin, together with what I saw in the app note project, and added the command to start the COMP UM. The project now works like a champ - and my i/o circuit is much simpler with just the pb to VCC rather than the resistor/pb network I had before.
So, again -- thanks!
Person is following a similar way to reach the destination. You are wellcome anytime at all.