VDD1PC14-OSC32_IN2PC15-OSC32_OUT3NRST4VDDA5PA06PA17PA28PA39PA410PA511PA612PA713PB014PB115VSS16VDD17PA818PA919PA1020PA1121PA1222PA1323PA1424PA1525PB326PB427PB528PB629PB730BOOT031VSS32