Other Parts Discussed in Thread: DRA750
We use GPMC as NAND flash I/O interface, and we found the waveform (Figure 2) measured at I/O pins (for example, GPMC_AD0) is with wrong I/O level (similar as Hi-Z level, in our case it is 1.75V got by cursor b),
It is not even H or L level , and the flash we use is MT29F2G16ABAEAWP-AIT-E.
The vendor of flash says he never sees this kind of waveform.
Figure 1 is the waveform we measured at your EVB (GPMC_AD3), it can be seen that there are also Hi-Z levels in this photo.
Can you tell us how it these Hi-Z level appear?
Figure 1 (TOP) & Figure 2 (BOTTOM)
