Thanks for posting that page Stef Philips I2C specs (303kB) http://www.semiconductors.philips.com/acrobat/literature/9398/39340011.pd= f =B7 Slope control and input filtering for Fast-mode devices is specified to improve the EMC behaviour. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist