EXTI falling trigger selection register
| FT0 | Falling trigger event configuration bit of configurable line |
| FT1 | Falling trigger event configuration bit of configurable line |
| FT2 | Falling trigger event configuration bit of configurable line |
| FT3 | Falling trigger event configuration bit of configurable line |
| FT4 | Falling trigger event configuration bit of configurable line |
| FT5 | Falling trigger event configuration bit of configurable line |
| FT6 | Falling trigger event configuration bit of configurable line |
| FT7 | Falling trigger event configuration bit of configurable line |
| FT8 | Falling trigger event configuration bit of configurable line |
| FT9 | Falling trigger event configuration bit of configurable line |
| FT10 | Falling trigger event configuration bit of configurable line |
| FT11 | Falling trigger event configuration bit of configurable line |
| FT12 | Falling trigger event configuration bit of configurable line |
| FT13 | Falling trigger event configuration bit of configurable line |
| FT14 | Falling trigger event configuration bit of configurable line |
| FT15 | Falling trigger event configuration bit of configurable line |
| FT16 | Falling trigger event configuration bit of configurable line |
| FT17 | Falling trigger event configuration bit of configurable line |
| FT18 | Falling trigger event configuration bit of configurable line |
| FT20 | Rising trigger event configuration bit of Configurable Event input |