Marechiare wrote: > That is, from the very Schmitt Trigger idea it is guaranteed that the > level below 2.7V won't be considered logic "1". No, read the datasheet again. The signal is guaranteed to be interpreted as high if it exceeds 80% of Vdd. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist