Approximately how many pF of capacitive load can be allowed on the DOUT_ outputs?
DOUT_ is connected to the other board through a connector and a cable. It's 80MHz and IOVDD=1.8V, but I can't get the data at the receiving end because of waveform rounding like sine-wave. (PCLKOUT is not rounding.)
Is it better to insert a buffer like a 74xx Logic IC just before the cable?