Interrupt Disable Register
| TXRDY | Transmit Ready Interrupt Disable |
| TXEMPTY | Transmit Empty Interrupt Disable |
| ENDTX | End of Transmission Interrupt Disable |
| TXBUFE | Transmit Buffer Empty Interrupt Disable |
| RXRDY | Receive Ready Interrupt Disable |
| OVRUN | Receive Overrun Interrupt Disable |
| ENDRX | End of Reception Interrupt Disable |
| RXBUFF | Receive Buffer Full Interrupt Disable |
| CP0 | Compare 0 Interrupt Disable |
| CP1 | Compare 1 Interrupt Disable |
| TXSYN | Tx Sync Interrupt Enable |
| RXSYN | Rx Sync Interrupt Enable |