SWI56=B_0x0
EXTI software interrupt event register
| SWI39 | Software interrupt on event x |
| SWI40 | Software interrupt on event x |
| SWI51 | Software interrupt on event 51 |
| SWI54 | Software interrupt on event 54 |
| SWI56 | Software interrupt on event 56 0 (B_0x0): Writing 0 has no effect. 1 (B_0x1): Writing 1 to this bit triggers a rising edge event on event x (bit auto cleared by hardware). |