SN65LVDS93A LVDS数据输出格式是如何确定的

datasheet 上有说输出 8Bit 的格式有三种，不知道这三种格式输出是通过什么来控制的，

datasheet 上有说:   FORMAT1/2 引脚

Note A. FORMAT: The majority of 24-bit LCD display panels require the two most significant bits (2 MSB ) of each color to be transferred over the 4th serial data output Y3. A few 24-bit LCD display panels require the two LSBs of each color to be transmitted over the Y3 output. The system designer needs to verify which format is expected by checking the LCD display data sheet.
• Format 1: use with displays expecting the 2 MSB to be transmitted over the 4th data channel Y3. This is the dominate data format for LCD panels.
• Format 2: use with displays expecting the 2 LSB to be transmitted over the 4th data channel.