PA232PA131PA0(EXTCLK)30GND29VDD28UPDI27PF6(RESET#)26PF525PF424PF323PF222PF1(XTAL32K2)21PF0(XTAL32K1)20GND19AVDD18PD717PD616PD515PD414PD313PD212PD111PD010PC39PC28PC17PC06PA75PA64PA53PA42PA31