Hi,
We are making validation board and we need to validate the high-speed signals.
The interface flow is like this SOC-->Level translator-->MUX--->End device.
Problem 1 :- Series termination
Where need to put series termination resistor? As from TI article I knew that it should be transmitter side but here my high-speed data signal are bidirectional.
so does it mean that I need the series termination at near soc side(when SOC is transmitting the signal) and at level translator side also (when end device is sending the data). Better understanding I can draw :-
SOC SR(near SOC)-->SR(neat level translator)Level translator(SR near LT)-->MUX(SR near MUX)-->SR(near end device)End device.
I know it is wrong but my data signals are bi-directional?
Problem 2- Where should I need to give test points provisions?As I read, It should be at Receiver side.
When I am receiving the signals from end device then it should be at SOC side(test points) and when SOC is transmitting the signal it should be at end points(Test Points).But here I have doubt that we are doing validation of SOC so for both TX and RX signals test points should be at SOC side(we are validating the SOC not end device). Can you explain here?
Problem 3-
SOC-->Level translator-->MUX--->End device
Where need to probe the signals, for RX signals it should be near SOC side but for TX signals?Because when SOC is transmitting the level translator is receiver for SOC so should I measure at level translator side?I am Confused. Because for end device signal is getting transmitted by output driver of level translator).
Thanks
Ash
