Thanks for the responses.
I was a little surprised by the power-up delay, as I could find nothing on that in the NHD datasheets or ap notes. In fact, the NHD timing diagrams show that signals can begin anywhere from 0 mS to 50 mS after power up. One even goes on to say that signal timing can be ignored as it is handled by the controllers. I have already added a 100 mS delay. It can't hurt. As for delay after reset, that is a little better described, but can also be monitored by status.