This application note assists users of Atmel® ATmega324 variants to understand the differences and use of the Atmel ATmega324PB.
ATmega324PB is not a drop-in replacement for ATmega324 variants, but a new device. However, the functions are backward compatible with the existing ATmega324 functions. Existing code for these devices will work with the new devices without changing existing configuration or enabling new functions. The code that is available for your existing ATmega324 variants will continue to work with the new ATmega324PB device.
The ATmega324PB features the successful Atmel QTouch® Peripheral Touch Controller (PTC).
For differences in errata, typical, and electrical characteristics between ATmega324 variants and ATmega324PB, refer to the specific device datasheets.
For complete device details, refer to the latest version of the ATmega324PB datasheet available at www.atmel.com.