In SX Microcontrollers, SX/B Compiler and SX-Key Tool, originator99 wrote: Thanks Bean for the detailed response. I like it that the chip is self contained for certian apps. I am a little unclear about the comment "So if you want to do serial communication".... does this include programming by the SX key sas well? I'd be fine with the 4mhz internal without any extrernal resonators as long as I can still pulg in the SX key for indivual download. The ULN is a good tip, easier to deal with and smaller that mosfets. Thanks ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=141374#m141480 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)