Hello PIC experts, I am developing a small project using the PIC 16C74 and recently needed to change the Crystal from 16MHz to 20MHz. When I did that, a problem started with the asynchronous communication controller, it started to recived wronge characters. Has any one had such problems ? Is 20MHz Crystal works OK with the 16C74 (the documentation says it should) ? Any special modification to the Crystal circut needs to be added for the 20MHz clock ? thanks chaipi \\\|/// \\ ~ ~ // ( @ @ ) ----------------------------oOOo-(_)-oOOo-------------------------------------- ! ! ! Chaipi Wijnbergen ! ! Electronics/Computer Eng. M.Sc. Tel : +972-8-9343079 ! ! Optical Imaging Laboratory Fax : +972-8-9344129 ! ! Brain Research Center Email : chaipi@tohu0.weizmann.ac.il ! ! Weizmann Institute of Science URL : http://www.weizmann.ac.il/~chaipi ! ! Rehovot 76100 ISRAEL IPhone : chaipi ! ! ! ------------------------------------Oooo.-------------------------------------- .oooO ( ) ( ) ) / \ ( (_/ \_)