Could someone explain the difference between a normal 2 pin crystal, a crystal oscillator and a resonator? Robert Rolf wrote: > > On Tue, 4 Jan 2000, Mike Harrison wrote: > > > Pin one is the 'pointy' corner, or one marked with dot on the top. > > Output may be cmos or TTL the former can be connected to PIC OSCIN > > pin, the latter may or may not have enough output to drive a PIC > > properly. > > However, if you add a 470 pullup to a TTL osc module output, it raises > Voh enough to work well. >