I'm performing a loopback test for USB-6509
I will connect each port to another port (port 0 channel 0 to port 1 channel 0 .. and so on)
I will write using port 0 and then read using port 1, then I will write using port 1 and I will read using port 0
my question is:
do i need to connect a pull-down resistor between each two channels ?