Compared to existing ATmega328 variants, the following enhancements or
additional features are available in ATmega328PB:
- PTC - Peripheral Touch
Controller.
- CFD - Clock Failure Detection
mechanism.
- OCM1C2 - Output Compare
Modulator.
- USART start frame detection is
available in all sleep modes
- Analog Comparator output is
available on a pin. This pin is multiplexed with PE0.
- Unique device ID to identify the
device
- Additional USART
- Additional SPI
- Additional TWI
- Additional Timer/Counters