I see that if using an external CMOS oscillator on just the OSC-IN pin that 0.3*VDD and 0.7VDD input levels or better are required. My external crystal oscillator using OSC-IN and OSC-OUT has a smaller voltage swing than 0.3VDD to 0.7VDD. Do the same levels apply in both cases? ST app note for oscillator design provides many other guidelines but not voltage levels.
