Software interrupt event register (EXTI_SWIER)
| SWIER0 | Software Interrupt on line 0 |
| SWIER1 | Software Interrupt on line 1 |
| SWIER2 | Software Interrupt on line 2 |
| SWIER3 | Software Interrupt on line 3 |
| SWIER4 | Software Interrupt on line 4 |
| SWIER5 | Software Interrupt on line 5 |
| SWIER6 | Software Interrupt on line 6 |
| SWIER7 | Software Interrupt on line 7 |
| SWIER8 | Software Interrupt on line 8 |
| SWIER9 | Software Interrupt on line 9 |
| SWIER10 | Software Interrupt on line 10 |
| SWIER11 | Software Interrupt on line 11 |
| SWIER12 | Software Interrupt on line 12 |
| SWIER13 | Software Interrupt on line 13 |
| SWIER14 | Software Interrupt on line 14 |
| SWIER15 | Software Interrupt on line 15 |
| SWIER16 | Software Interrupt on line 16 |
| SWIER17 | Software Interrupt on line 17 |
| SWIER18 | Software Interrupt on line 18 |
| SWIER19 | Software Interrupt on line 19 |
| SWIER20 | Software Interrupt on line 20 |
| SWIER21 | Software Interrupt on line 21 |
| SWIER22 | Software Interrupt on line 22 |