| **Pin #** | **Pin name ** | **function** | **settings** | **comment ** |
| --------- | ------------- | ------------ | ------------ | ------------ |
| 1         | VBAT          |              |              |              |
| 3         | PC13          |              |              |              |
| 3         | PC14          |              |              |              |
| 4         | PC15          |              |              |              |
| 5         | OCS_IN        |              |              |              |
| 6         | OSC_OUT       |              |              |              |
| 7         | NRST          |              |              |              |
| 8         | VSSA          |              |              |              |
| 9         | VDDA          |              |              |              |
| 10        | PA0           |              |              |              |
| 11        | PA1           |              |              |              |
| 12        | PA2           |              |              |              |
| 13        | PA3           |              |              |              |
| 14        | PA4           |              |              |              |
| 15        | PA5           |              |              |              |
| 16        | PA6           |              |              |              |
| 17        | PA7           |              |              |              |
| 18        | PB0           |              |              |              |
| 19        | PB1           |              |              |              |
| 20        | PB2           |              |              |              |
| 21        | PB10          |              |              |              |
| 22        | PB11          |              |              |              |
| 23        | VSS1          |              |              |              |
| 24        | VDD1          |              |              |              |
| 25        | PB12          |              |              |              |
| 26        | PB13          |              |              |              |
| 27        | PB14          |              |              |              |
| 28        | PB15          |              |              |              |
| 29        | PA8           |              |              |              |
| 30        | PA9           |              |              |              |
| 31        | PA10          |              |              |              |
| 32        | PA11          |              |              |              |
| 33        | PA12          |              |              |              |
| 34        | PA13          |              |              |              |
| 35        | VSS2          |              |              |              |
| 36        | VDD2          |              |              |              |
| 37        | PA14          |              |              |              |
| 38        | PA15          |              |              |              |
| 39        | PB3           |              |              |              |
| 40        | PB4           |              |              |              |
| 41        | PB5           |              |              |              |
| 42        | PB6           |              |              |              |
| 43        | PB7           |              |              |              |
| 44        | BOOT0         |              |              |              |
| 45        | PB8           |              |              |              |
| 46        | PB9           |              |              |              |
| 47        | VSS3          |              |              |              |
| 48        | VDD3          |              |              |              |