Interrupt enable register
| TCIEN | Transmission complete interrupt enable |
| RF0MIEN | FIFO 0 receive message interrupt enable |
| RF0FIEN | Receive FIFO 0 full interrupt enable |
| RF0OIEN | Receive FIFO 0 overflow interrupt enable |
| RF1MIEN | FIFO 1 receive message interrupt enable |
| RF1FIEN | Receive FIFO 1 full interrupt enable |
| RF1OIEN | Receive FIFO 1 overflow interrupt enable |
| EAIEN | Error active interrupt enable |
| EPIEN | Error passive interrupt enable |
| BOIEN | Bus-off interrupt enable |
| ETRIEN | Error type record interrupt enable |
| EOIEN | Error occur interrupt enable |
| QDZIEN | Quit doze mode interrupt enable |
| EDZIEN | Enter doze mode interrupt enable |