Control Register
| START | Send a START Condition |
| STOP | Send a STOP Condition |
| MSEN | TWIHS Master Mode Enabled |
| MSDIS | TWIHS Master Mode Disabled |
| SVEN | TWIHS Slave Mode Enabled |
| SVDIS | TWIHS Slave Mode Disabled |
| QUICK | SMBus Quick Command |
| SWRST | Software Reset |
| HSEN | TWIHS High-Speed Mode Enabled |
| HSDIS | TWIHS High-Speed Mode Disabled |
| SMBEN | SMBus Mode Enabled |
| SMBDIS | SMBus Mode Disabled |
| PECEN | Packet Error Checking Enable |
| PECDIS | Packet Error Checking Disable |
| PECRQ | PEC Request |
| CLEAR | Bus CLEAR Command |
| ACMEN | Alternative Command Mode Enable |
| ACMDIS | Alternative Command Mode Disable |
| THRCLR | Transmit Holding Register Clear |
| LOCKCLR | Lock Clear |
| FIFOEN | FIFO Enable |
| FIFODIS | FIFO Disable |