http://forum.microchip.com/tm.aspx?m=299524 One more [PIC] tag post ;-) This is kind of interesting but I am not so sure what is a fair comparison between these two lines of MCUs. >From cost/performance point of view, I will think most of the 18F (not 18J and 18K) do not make much sense now that they are too expensive compare to PIC18J/PIC24 or other MCUs like AVR. Xiaofan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist