Escape character configuration
| TX_C0_ESC_EN | Set this bit to enable decoding char 0xc0 when DMA receives data.  |  
| TX_DB_ESC_EN | Set this bit to enable decoding char 0xdb when DMA receives data.  |  
| TX_11_ESC_EN | Set this bit to enable decoding flow control char 0x11 when DMA receives data.  |  
| TX_13_ESC_EN | Set this bit to enable decoding flow control char 0x13 when DMA receives data.  |  
| RX_C0_ESC_EN | Set this bit to enable replacing 0xc0 by special char when DMA sends data.  |  
| RX_DB_ESC_EN | Set this bit to enable replacing 0xdb by special char when DMA sends data.  |  
| RX_11_ESC_EN | Set this bit to enable replacing flow control char 0x11 by special char when DMA sends data.  |  
| RX_13_ESC_EN | Set this bit to enable replacing flow control char 0x13 by special char when DMA sends data.  |