In order to understand the controller unit of a car heater i need some information about a COPC345 microcontroller of National semiconductor. There is no imformation about this COP on the National site, is there anybody having a datasheet of this (old) mc? Leo van Loon SBB simpeltronics Netherlands mail sbb.simpeltron@tip.nl url www.sbb-simpeltronics.nl SBB simpeltronics develops technical projects for children in primary and secondary education. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.