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 |