FPIF56=B_0x0
EXTI falling edge pending register
| FPIF39 | Configurable event input x falling edge pending bit |
| FPIF40 | Configurable event input x falling edge pending bit |
| FPIF51 | Configurable event input 51 falling edge pending bit |
| FPIF54 | Configurable event input 54 falling edge pending bit |
| FPIF56 | Configurable event input 56 falling edge pending bit 0 (B_0x0): No falling edge trigger request occurred 1 (B_0x1): Falling edge trigger request occurred |