PA01PA12PA23PA34PA45PA56USBDM/PC67USBDP/PC78CLDO9VDD10VSS11nRST12X32KIN/PB1013X32KOUT/PB1114RTCOUT/PB1215XTALIN/PB1316XTALOUT/PB1417PA9_BOOT18SWCLK/PA1219SWDIO/PA1320PA1421PA1522PB023PB124PB225PB326PB427PB528PB729PB830VDDA31VSSA32EP33