Contents

Introduction Features 1. Pin Functionality Difference 1.1. Additional Pin Functionalities 1.2. Alternate Pin Configuration 2. Enhancement and Additional Features in ATmega328PB 2.1. PTC - Peripheral Touch Controller 2.1.1. PTC Functional Description 2.2. CFD - Clock Failure Detection mechanism 2.3. OCM1C2 - Output Compare Modulator 2.4. USART 2.5. Analog Comparator 2.6. Serial Number 2.7. Additional SPI 2.8. Additional TWI 2.9. Additional Timer/Counters 3. Updated Features 3.1. Full Swing Oscillator 3.2. Calibrated Internal RC Oscillator Accuracy 3.3. Parallel Programming 3.4. Power Save Mode 3.5. NVM 3.6. Signature Bytes 4. Register Description 4.1. Port E Input Pins Address 4.2. Port E Data Direction Register 4.3. Port E Data Register 4.4. XOSC Failure Detection Control And Status Register 4.5. USART Control and Status Register 0 D 4.6. USART Control and Status Register n D 4.7. Analog Comparator Control and Status Register B 5. Revision History