I understand that the datasheet can be a bit confusing. For the TDA19988 HDMI transmitter, the default setting for the input port when using RGB888 is typically 24 bits per pixel. This means that each pixel is represented by 24 bits, with 8 bits each for red, green, and blue.
Here are some general steps to configure the TDA19988 for RGB888:
Input Format: Set the input format to RGB888.
Pixel Format: Ensure that the pixel format is set to RGB888.
Resolution: Configure the resolution according to your requirements (e.g., 1920x1080).
Color Depth: Set the color depth to 24 bits per pixel.