PA448PA347PA246PA145PA0(EXTCLK)44GND43VDD42UPDI41PF6(RESET)40PF539PF438PF337PF236PF1(XTAL32K2)35PF0(XTAL32K1)34PE333PE232PE131PE030GND29AVDD28PD727PD626PD525PD424PD323PD222PD121PD020PC719PC618PC517PC416GND15VDD14PC313PC212PC111PC010PB59PB48PB37PB26PB15PB04PA73PA62PA51