OTG Interrupt Enable
| TMR_EN | 1 = enable the corresponding bit in the IntSt register. |
| REMOVE_PU_EN | 1 = enable the corresponding bit in the IntSt register. |
| HNP_FAILURE_EN | 1 = enable the corresponding bit in the IntSt register. |
| HNP_SUCCES_EN | 1 = enable the corresponding bit in the IntSt register. |
| RESERVED | Reserved. Read value is undefined, only zero should be written. |