Hi, Can I use the PIC16F84 4Mhz up to 20Mhz ? becuse i found a zip file contain a circuit for cablecrypt system (Irdeto' encryption Analogue) it needs a 10 mhz to run at 20 mhz and i have the 4 mhz only ? AmR _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com