------------AB1B618AFC6800 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Gentlemen, Help me catch the idea of postings on bouncing-debouncing. (I counted more the dozen postings) I was not at home all day. I'm tied a little, so my question may be stupid. It goes about attaching a button to RB0. I know, this gang of chipmakers has a strong position, that interrupt pin must be a Schmitt Trigger input. Have look on DS30292B-page 7 (PIC16F87X): "Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt." Schmitt Trigger is a thing to construct with a bounceless input by hardware design. I've attached a .jpg with it. May be I'm wrong? What is the sense in programmatic debouncing with a Schmitt Trigger. Is not it enough simply to desable interrupt while interrupt handling? Thanks. 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