well, my little friends
I am not your little friend, I'm 6'4
You state:
don't ask me to use same derivate prosessor instead. At this moment I have to get into this with the hardware I already have.
and then you do not "have to get into this with the hardware I already have":
Got to have some external components to this circuit
So, WHY add external components instead of using a derivative with a PCA or CCA.

Erik