The 80-bit Custom pattern is used for generating the Post Cursor2 Test Pattern (PCTPAT) and the Pre-Emphasis Level Test Pattern (PLTPAT). The SN65DSI86 will continuously transmit the value programmed into the 80BIT_CUSTOM_PATTERN registers when the ML_TX_MODE is programmed to 80-bit Custom Pattern. The SN65DSI86 will always transmit over the enabled DisplayPort Lanes the LSB of the byte first and the MSB of the byte last. The byte at the lowest address is transmitted first.