AN2603

5.2 Full Swing Oscillator

The ATmega48A/88A/168A device includes a full swing crystal oscillator as a clock source option, which can be selected by configuring the flash fuse. In the new ATmega48PB/88PB/168PB, the full swing crystal oscillator is removed. Refer to the "Clock Sources" chapter in the device data sheet.

Table 5-2. Full Swing Oscillator Removed from ATmega48PB/88PB/168PB
Device Function	ATmega48A/88A/168A	ATmega48PB/88PB/168PB
Full swing crystal oscillator	Yes	No

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