Category: Simulation
tool:-
device:-


"at Pin" is the waveform when looking at the pin of the device, and "at Die" is the waveform when looking at the die of the device (specifically the IO buffer).
The waveform that the device actually recognizes as a waveform is the at Die waveform.

This at Die waveform is beautifully formed, and if it satisfies the device's IO characteristics and IO protocol standards, it can be judged that the waveform is correctly recognized by the actual device.

However, even if the at Die waveform is beautiful in the board simulation, it is not possible to actually measure the waveform of the at Die point in the actual device.
Since the points that can be measured on the actual device are near the pins, it is necessary to compare them with the at Pin waveform of the board simulation.

in short,
The waveform measured near the pin of the device and the waveform at Pin of the board simulation are similar
=> The at Die waveform in the board simulation can be judged as the waveform at the die (IO buffer) of the actual device
It is considered.
Therefore, even if there are steps or reflections in the at Pin waveform, if the at Die waveform is clean, it can be judged that there is no problem.