PA51PA62PA73PB04PB15PB26PB37PB48PB59PC010PC111PC212PC313VDD14GND15PC416PC517PC618PC719PD020PD121PD222PD323PD424PD525PD626PD727AVDD28GND29PE030PE131PE232PE333PF0(XTAL32K1)34PF1(XTAL32K2)35PF236PF337PF438PF539PF6(RESET)40UPDI41VDD42GND43PA0(EXTCLK)44PA145PA246PA347PA448EP49