> > It matters because my driver is NOT o.c. Then the bus is not I2c. I suggest you re-read the specification, better still - this document is better as it includes how to use it instructions http://www-us.semiconductors.philips.com/acrobat/various/I2CBUS.pdf Chris Carr -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads