I am doing LPDDR4 SI through DDRx wizard.
In log file of results, it shows error...
** Error **: There is no signal in this net!
** Error **: Error : Signal & Clock waveforms are too short. Cannot build eye diagram.
See attached picture.
On the stimulus page of the Wizard, try doubling or tripling the number of bits in the stimulus pattern. Since the data pattern is PRBS, a bit pattern of 16 might have only 3 or 4 transitions with the multiple sequential bits of the same value.
But it is already set to 128 bits(default).
128 bits should be sufficient. The next thing I would do is ensure that the option to save waveforms is enabled. Find the waveform file for the driver and receiver one net of interest. See if the driver is putting out the expected signal. Then see if the signal is reaching the receiver. From that, maybe you can track down where the disconnect is. Here is an old article about the waveforms. Some minor details have changed, but the overall idea is still the same.
Yes, waveform (.csv) file is generated for driver & receiver.
I opened one driver waveform file of DQ0 signal in digital oscilloscope but
it's flat signal (0v).
OK. That's a good step. Now we know that the problem is either the driver model or the stimulus. The stimulus comes from the tool, is quite simple, and is well-tested. The more probable problem is in the driver model. Look at the details of the driver model and package model instantiated on DQ0. If you are not familiar with the modeling language (assuming IBIS) then you might get some help from a local expert, or you can open an SR on support.mentor.com.
This is great help.
I have raised SR for this issue.
Retrieving data ...