I don't know your particular device but those devices typically don't "read" the data pins until they are "strobed", ie. a particular pin is going through a transition. In that case, no atomicity of writing to the data pins makes zero difference.
I don't know your particular device but those devices typically don't "read" the data pins until they are "strobed", ie. a particular pin is going through a transition. In that case, no atomicity of writing to the data pins makes zero difference.