ATmega328PB Testing

Hardware

• Wattuino Pro Mini PB 5V 16MHz (with ATmega328PB)
• Wattuino Pro Mini PB 3.3V 8MHz (with ATmega328PB)

Software

Installation on Arduino IDE 1.8+

1. Add the following URLs to the Arduino Boards Manager (File->Preferences).

   https://downloads.arduino.cc/packages/package_avr_3.6.0_index.json
   https://github.com/watterott/ATmega328PB-Testing/raw/master/package_m328pb_index.json
   

2. Update the Arduino AVR Boards to version 1.6.206 via the Boards Manager (Tools->Boards->Boards Manager).

3. Install the ATmega328PB Boards via the Boards Manager (Tools->Boards->Boards Manager).

Further Infos

• Arduino AVR-GCC Toolchain with Atmega328PB support: arduino/toolchain-avr#47

• Differences between ATmega328/P and ATmega328PB: http://www.atmel.com/Images/Atmel-42559-Differences-between-ATmega328P-and-ATmega328PB_Application%20Note_AT15007.pdf

• Another project/guide for the ATmega328PB: https://hackaday.io/project/9313-uino-mini-super-atmega328pb

• ATmega328PB Discussion in the Italian Arduino Forum: http://forum.arduino.cc/index.php?topic=374642.0

Known Issues

Timer 3+4 Output Compare

The output compare will only work if a 1 or 0 is written to the port register depending on the modulation. Futher infos here: http://www.avrfreaks.net/comment/1717946#comment-1717946 and watterott#29

Reset

ATmega328P and ATmega328PB have different thresholds for reset. This can be a problem when using a 5V power supply for the microcontroller and an USB serial adapter with 3.3V logic level on DTR.

• Reset Input Threshold Voltage (read as 0/low):
  • ATmega328P: 2.1V @ Vcc=5V
  • ATmega328PB: 1.6V @ Vcc=5V

Crystal Oscillator

The ATmega328PB has no full-swing option for the oscillator.

History / Contributions

• Patch v1.0.1 - Astrobeed, gpb01, PaoloP
• avr-gcc 4.9.2 for linux64 - sabas1080
• All Pull Requests...