What we currently do on just about all our boards is to use the DS2409 as a board level select with the AUX channel talking to a DS2433 (EEPROM). (Ala Dallas idea) Its a fairly large capacity device which makes holding a number of ID tag's possible. And helping keep the idea of 1 tag device per board. This also allows more meaningful data descriptors to be held if desired. (i.e.. manufacture data (Version, dates, etc)/installation data (location, service dates, etc.) Though any EEPROM device would be a good candidate also (larger space is better). The recent DS28E04S-100 also address the need for physical board address values along with EEPROM. Which allows installation addressing info to be added in the field.
The cost factor is trivial when considered against the needs for good record device management. And since the devices can be field updated during installation (good and bad, its is not a huge problem.). Device key being the DS2409 ID or EEPROM. .I suppose ideally a system would scan for these devices (EPROM,EEPROM, HUBS etc.) and build a table when found. Thus the routing and device addresses for all parts are pre-known, for a fixed complex network. David Lissiuk Sr. Computer Scientist Springbok Digitronics. ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. How far can you shotput a projector? How fast can you ride your desk chair down the office luge track? If you want to score the big prize, get to know the little guy. Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20 _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
