HI lihaijiang, got the chips and test boards over the holiday. I'm catching up on other things at the moment, but I did find the time to unpack the box, look things over, and start thinking about how I will hook them up.
Zero documentation, of course, other than the chip datasheet and the schematic you provided here. Taking care of customer questions is what the reseller does, right? LOL.
Since I don't normally use opto-isolated inputs, I assume I can just connect all the negative inputs together (ENA-, CLK-, CWW-) to ground and then feed in my STEP signal to CLK+, DIRECTION to CWW-. And ENA+ needs to be tied to +5? Any safe way to just short that on the board?