That’s pretty easy. OWIN and OWOUT are going to be the commands you use. As far as the protocol I would start with looking through datasheets on the maxim site. The protocol is generally very simple. The only problem you may have is you need a unique ID number if there are going to be other nodes on the line and you will have to create a CRC for each packet. It’s a Master/Slave arrangement so you will need a master to control these slaves you are creating.

This may be a good place to start:

http://www.maxim-ic.com/appnotes.cfm/appnote_number/126