Hi to all engineers. I am currently working on pic16c62a. I know portb has optional pull-up resistors to turn on and off and default is on but what I do not know what if you make portb as input then what happens? do we still have pull-up on or it is only for output to make open collector. Andre thank you ========================================== = http://www.compufire.com = = mailto:andre@compufire.com = = mailto:mcu-engineering@compufire.com = = Andre Abelian: Engine Electronics, Inc.= = Tel 909-589-5485 Fax 909-598-5695 = ==========================================