Interrupt Disable Register
| RXRDY | RXRDY Interrupt Disable |
| TXRDY | TXRDY Interrupt Disable |
| ENDRX | End of Receive Buffer Transfer Interrupt Disable |
| ENDTX | End of Transmit Buffer Interrupt Disable |
| OVRE | Overrun Error Interrupt Disable |
| TXEMPTY | TXEMPTY Interrupt Disable |
| UNRE | SPI Underrun Error Interrupt Disable |
| TXBUFE | Transmit Buffer Empty Interrupt Disable |
| RXBUFF | Receive Buffer Full Interrupt Disable |