Interrupt register for EP0 and IN EP1-15.
| EP0_IN_INT | Endpoint 0 interrupt. |
| EP1_IN_INT | Endpoint 1 interrupt. |
| EP2_IN_INT | Endpoint 2 interrupt. |
| EP3_IN_INT | Endpoint 3 interrupt. |
| EP4_IN_INT | Endpoint 4 interrupt. |
| EP5_IN_INT | Endpoint 5 interrupt. |
| EP6_IN_INT | Endpoint 6 interrupt. |
| EP7_IN_INT | Endpoint 7 interrupt. |
| EP8_IN_INT | Endpoint 8 interrupt. |
| EP9_IN_INT | Endpoint 9 interrupt. |
| EP10_IN_INT | Endpoint 10 interrupt. |
| EP11_IN_INT | Endpoint 11 interrupt. |
| EP12_IN_INT | Endpoint 12 interrupt. |
| EP13_IN_INT | Endpoint 13 interrupt. |
| EP14_IN_INT | Endpoint 14 interrupt. |
| EP15_IN_INT | Endpoint 15 interrupt. |