interrupt enable register
| RXBRIE | Rx-Byte Received Interrupt Enable |
| RXENDIE | End Of Reception Interrupt Enable |
| RXOVRIE | Rx-Buffer Overrun Interrupt Enable |
| BREIE | Bit Rising Error Interrupt Enable |
| SBPEIE | Short Bit Period Error Interrupt Enable |
| LBPEIE | Long Bit Period Error Interrupt Enable |
| RXACKIE | Rx-Missing Acknowledge Error Interrupt Enable |
| ARBLSTIE | Arbitration Lost Interrupt Enable |
| TXBRIE | Tx-Byte Request Interrupt Enable |
| TXENDIE | Tx-End of message interrupt enable |
| TXUDRIE | Tx-Underrun interrupt enable |
| TXERRIE | Tx-Error Interrupt Enable |
| TXACKIE | Tx-Missing Acknowledge Error Interrupt Enable |