The AM882 manual has this diagram, and it says

"In order to avoid some fault operations and deviations, PUL, DIR and ENA should abide by some
rules, shown as following diagram: "
Click image for larger version. 

Name:	Image1.jpg 
Views:	721 
Size:	62.2 KB 
ID:	12157

So will a simple controller also have to obey these 'rules' ?