>>...you can put multiple slaves on an SPI-type bus, but--unlike I2C--each >> slave chip will require its own select line... > >If I understand correctly, additional lines will go from the master to each >slave, permetting me to select the slave I want to "talk" to. I think that's >what they call Slave Select, right? > >Thank you, >Jean-Francois That's right. You can use individual port pins (the way to go with only two slaves) or you can use a decoder chip such as an 'HC138 if you have a lot of slaves. Using a decoder chip has the added benefit that it automatically enforces only one slave active on the bus at a time. --BN ---------------------------------------------------------------------------- Country Robot "Modular robot components 69 S. Fremont Ave. # 2 for education and industry" Pittsburgh, PA 15202 ----------------------------------------------------------------------------