UHCI Escapes Sequence Configuration Register2
ESC_SEQ1 | Configures the char needing encoding, which is 0x11 as flow control char by default. |
ESC_SEQ1_CHAR0 | Configures the first char of SLIP escape character, default value is 0xDB. |
ESC_SEQ1_CHAR1 | Configures the second char of SLIP escape character, default value is 0xDE. |