Port interrupt mask register
| EDGE0 | Masks edge interrupt on IO pin 0 ‘0’: Pin interrupt forwarding disabled ‘1’: Pin interrupt forwarding enabled |
| EDGE1 | Masks edge interrupt on IO pin 1 |
| EDGE2 | Masks edge interrupt on IO pin 2 |
| EDGE3 | Masks edge interrupt on IO pin 3 |
| EDGE4 | Masks edge interrupt on IO pin 4 |
| EDGE5 | Masks edge interrupt on IO pin 5 |
| EDGE6 | Masks edge interrupt on IO pin 6 |
| EDGE7 | Masks edge interrupt on IO pin 7 |
| FLT_EDGE | Masks edge interrupt on filtered pin selected by INTR_CFG.FLT_SEL |