OTG Interrupt Status
| TMR | Timer time-out. |
| REMOVE_PU | Remove pull-up. This bit is set by hardware to indicate that software needs to disable the D+ pull-up resistor. |
| HNP_FAILURE | HNP failed. This bit is set by hardware to indicate that the HNP switching has failed. |
| HNP_SUCCESS | HNP succeeded. This bit is set by hardware to indicate that the HNP switching has succeeded. |
| RESERVED | Reserved. Read value is undefined, only zero should be written. |