kris duff wrote: > I would like to know if it is possible to filter only the ID > partially ( something like bits [0:12] ). Yes. That's why there are both masks and filters. Both are well explained in the datasheet. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .