The following is the assignments of the pin：
| PIN Number | PIN Name | Assignment | Note |
|---|---|---|---|
| 1 | VDD | +3V3 | |
| 2 | PF0-OSC_IN | TIM1_CH3N | |
| 3 | PF1-OSC_OUT | BEMF3 | |
| 4 | PG10-NRST | NRST | |
| 5 | PA0 | V-BUS | |
| 6 | PA1 | OPAmp1+ | |
| 7 | PA2 | NC | |
| 8 | PA3 | OPAmp1- | |
| 9 | PA4 | BEMF1 | |
| 10 | PA5 | OPAmp2+ | |
| 11 | PA6 | NC | |
| 12 | PA7 | OPAmp2- | |
| 13 | PB0 | BEMF2 | |
| 14 | VSSA | GND | |
| 15 | VDDA | +3V3 | |
| 16 | VSS | GND | |
| 17 | VDD | +3V3 | |
| 18 | PA8 | TIM1_CH1 | |
| 19 | PA9 | TIM1_CH2 | |
| 20 | PA10 | TIM1_CH3 | |
| 21 | PA11 | TIM1_CH1N | |
| 22 | PA12 | TIM1_CH2N | |
| 23 | PA13 | SWDIO | |
| 24 | PA14 | SWCLK | |
| 25 | PA15 | SPI1_NSS | Chip select |
| 26 | PB3 | SPI1_SCK | |
| 27 | PB4 | SPI1_MISO | |
| 28 | PB5 | SPI1_MOSI | |
| 29 | PB6 | LED | |
| 30 | PB7 | GPIO_BEMF | |
| 31 | PB8-BOOT0 | BOOT | |
| 32 | VSS | GND |