Packed Pixel Stream, 24-bit Format, Long packet, Data Type = 11 1110 (3Eh)

Packed Pixel Stream 24-Bit Format is a Long packet. It is used to transmit image data formatted as 24-bit pixels to a Video Mode display module. The packet consists of the DI byte, a two-byte WC, an ECC byte, a payload of length WC bytes and a two-byte Checksum. The pixel format is red (8 bits), green (8 bits) and blue (8 bits), in that order. Each color component occupies one byte in the pixel stream; no components are split across byte boundaries. Within a color component, the LSB is sent first, the MSB last.

With this format, pixel boundaries line up with byte boundaries every three bytes. It is strongly recommended that the total line width be a multiple of three bytes and that timing in the host processor use that time unit (three bytes) for its activity, including assertion of Transmit Request to its PHY layer. This ensures that every scan line has the same synchronous relationship between the Byte clock and Pixel clock.