Currently I use PCI 6509 as output signal to USB-6509(USB2.0). The Rising Edge Line is PORT0-LINE0 as change detection signal for USB6509.
But I found when I ran it as while loop... it would show: overflow or not able to detect change detection signal.
I tried enlarge the cycle of the pulse signal from PCI6509. Only get less error but still error.
What should I do now? seems not only speed issue.