PA31PA42PA53PA64PA75PC06PC17PC28PC39VDDIO210PD111PD212PD313PD414PD515PD616PD717VDD18GND19PF0(XTAL32K1)20PF1(XTAL32K2)21PF222PF323PF424PF525PF6(RESET#)26PF7(UPDI)27VDD28GND29PA0(XTALHF1)30PA1(XTALHF2)31PA232EP33