Full Swing Oscillator

The ATmega48/88/168 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 1. Full Swing Oscillator Removed from ATmega48PB/88PB/168PB
Device Function ATmega48/88/168 ATmega48PB/88PB/168PB
Full swing crystal oscillator Yes No