addr_slave_width=b7, speed=standard
Control Register
| master_mode | Master Mode |
| speed | Speed 0 (standard): STANDARD 1 (fast): FAST 2 (highspeed): HIGHSPEED |
| addr_slave_width | Slave address width 0 (b7): 7-bit address 1 (b10): 10-bit address |
| restart_en | Enable Restart |
| slave_disable | Disable Slave |
| stop_det | STOP_DET_IFADDRESSED |
| tx_empty | TX_EMPTY_CTRL |