Interrupt enable register
| DB_TMP_READY_INT_ENA | Write 1 to enable H264_DB_TMP_READY_INT. |
| REC_READY_INT_ENA | Write 1 to enable H264_REC_READY_INT. |
| FRAME_DONE_INT_ENA | Write 1 to enable H264_FRAME_DONE_INT. |
| DMA_MOVE_2MB_LINE_DONE_INT_ENA | Enable bit: Write 1 to enable H264_DMA_MOVE_2MB_LINE_DONE_INT. |