MODE=USART_EXT_CLK
I2CS Control A
| SWRST | Software Reset  |  
| ENABLE | Enable  |  
| MODE | Operating Mode 0 (USART_EXT_CLK): USART mode with external clock 1 (USART_INT_CLK): USART mode with internal clock 2 (SPI_SLAVE): SPI mode with external clock 3 (SPI_MASTER): SPI mode with internal clock 4 (I2C_SLAVE): I2C mode with external clock 5 (I2C_MASTER): I2C mode with internal clock  |  
| RUNSTDBY | Run during Standby  |  
| PINOUT | Pin Usage  |  
| SDAHOLD | SDA Hold Time  |  
| SEXTTOEN | Slave SCL Low Extend Timeout  |  
| SPEED | Transfer Speed  |  
| SCLSM | SCL Clock Stretch Mode  |  
| LOWTOUTEN | SCL Low Timeout Enable  |