Interrupt Disable Register
| RXRDY | Disable RXRDY Interrupt |
| TXRDY | Disable TXRDY Interrupt |
| ENDRX | Disable End of Receive Transfer Interrupt |
| ENDTX | Disable End of Transmit Interrupt |
| OVRE | Disable Overrun Error Interrupt |
| FRAME | Disable Framing Error Interrupt |
| PARE | Disable Parity Error Interrupt |
| TXEMPTY | Disable TXEMPTY Interrupt |
| TXBUFE | Disable Buffer Empty Interrupt |
| RXBUFF | Disable Buffer Full Interrupt |