Host Control Register
| HOST | host mode bit |
| URST | bus reset bit |
| SOFIRE | SOF interrupt enable bit |
| DIRE | device disconnection detection interrupt enable bit |
| CNNIRE | device connection detection interrupt enable bit |
| CMPIRE | token completion interrupt enable bit |
| URIRE | bus reset interrupt enable bit |
| RWKIRE | resume interrupt enable bit |
| RETRY | retry enable bit |
| CANCEL | token cancellation enable bit |
| SOFSTEP | SOF interrupt occurrence selection bit |