http://packs.download.atmel.com/#collapse-Atmel-ATmega-DFP-pdsc
1.2.203 (2017-12-15)
Corrected register names for ATmega4809, ATmega4808, ATmega3209 and ATmega3208.
1.2.150
...
Added ATmega4809, ATmega4808, ATmega3209 and ATmega3208.
Two-level (plus NMI) interrupt controller
32KB and 48KB flash (likely unified memory)
28/32 pins for 8, 48 pins for 9