Pending register (EXTI_PR)
| PR0 | Pending bit 0 |
| PR1 | Pending bit 1 |
| PR2 | Pending bit 2 |
| PR3 | Pending bit 3 |
| PR4 | Pending bit 4 |
| PR5 | Pending bit 5 |
| PR6 | Pending bit 6 |
| PR7 | Pending bit 7 |
| PR8 | Pending bit 8 |
| PR9 | Pending bit 9 |
| PR10 | Pending bit 10 |
| PR11 | Pending bit 11 |
| PR12 | Pending bit 12 |
| PR13 | Pending bit 13 |
| PR14 | Pending bit 14 |
| PR15 | Pending bit 15 |
| PR16 | Pending bit 16 |
| PR17 | Pending bit 17 |
| PR18 | Pending bit 18 |
| PR19 | Pending bit 19 |
| PR20 | Pending bit 20 |
| PR21 | Pending bit 21 |
| PR22 | Pending bit 22 |