Full Swing Oscillator

Clock source options of the ATmega324 variants include full swing crystal oscillator, which can be selected by configuring the flash fuse. However, in the new ATmega324PB, the full swing crystal oscillator is removed. Refer to the Clock Sources in the respective datasheet.

Table 1. Full Swing Oscillator Removed from ATmega324PB
Device function ATmega324PB ATmega324PA ATmega324P ATmega324A
Full swing crystal oscillator No Yes Yes Yes