Table 7-2. Byte Oriented Frame Buffer Organization - Cirrus Logic EP93 Series User Manual

most significant location on a per byte basis.
words in a byte oriented Frame Buffer organization.
As stored in memory
4 bits per pixel
32-bit Word
Byte 3 Byte 2
bit 31 bit 24 bit 23 bit 16 bit 15
Pixel 6 Pixel 7 Pixel 4 Pixel 5 Pixel 2
8 bits per pixel
32-bit Word
Byte 3 Byte 2
bit 31 bit 24 bit 23 bit 16 bit 15
Pixel 3 Pixel 2
15 or 16 bits per pixel
32-bit Word
Byte 3 Byte 2
bit 31 bit 24 bit 23 bit 16 bit 15
Pixel 1
24 bits per pixel packed
32-bit Word 0
Byte 3 Byte 2
bit 31 bit 24 bit 23 bit 16 bit 15
Pixel 1 Blue Pixel 0 Red
32-bit Word 1
Byte 7 Byte 6
bit 31 bit 24 bit 23 bit 16 bit 15
Pixel 2 Green Pixel 2 Blue
32-bit Word 2
Byte B Byte A
bit 31 bit 24 bit 23 bit 16 bit 15
DS785UM1
Raster Engine With Analog/LCD Integrated Timing and Interface

Table 7-2. Byte Oriented Frame Buffer Organization

Byte1 Byte 0
bit 8 bit 7 bit 0
Pixel 3 Pixel 0 Pixel 1
Byte1 Byte 0
bit 8 bit 7 bit 0
Pixel 1 Pixel 0
Byte1 Byte 0
bit 8 bit 7 bit 0
Pixel 0
Byte 1 Byte 0
bit 8 bit 7 bit 0
Pixel 0 Green Pixel 0 Blue
Byte 5 Byte 4
bit 8 bit 7 bit 0
Pixel 1 Red Pixel 1 Green
Byte 9 Byte 8
bit 8 bit 7 bit 0
Copyright 2007 Cirrus Logic
Table 7-2 demonstrates pixel packing within
In pixel output order (progressive scan)
Pixel 0 is first pixel out (upper left corner of screen) -->
Pixel Pixel Pixel
Pixel 2
0 1
bit 7 bit 0 bit 15 bit 8 bit 23
Byte 0 Byte1
32-bit Word
Pixel 0 Pixel 1
bit 7 bit 0 bit 15 bit 8 bit 23
Byte 0 Byte1
32-bit Word
Pixel 0
bit 15 bit 8 bit 7 bit 0 bit 31
Byte1 Byte 0
32-bit Word
Pixel 0 Pixel 1
Red Red
bit 23 bit 16 bit 15 bit 8 bit 7
Byte 2 Byte 5
Word 0 Word 1
Green Green
bit 15 bit 8 bit 7 bit 0 bit 31
Byte 1 Byte 4
Word 0 Word 1
Blue Blue
bit 7 bit 0 bit 31 bit 24
Byte 0 Byte 3
Word 0 Word 0
EP93xx User's Guide
Pixel Pixel Pixel Pixel
3 4 5 6
bit 16 bit 31 bit 24
Byte 2 Byte 3
Pixel 2 Pixel 3
bit 16 bit 31 bit 24
Byte 2 Byte 3
Pixel 1
bit 24 bit 23 bit 16
Byte 3 Byte 2
Pixel 2 Pixel 3
Red Red
bit 0 bit 31 bit 24
Byte 8 Byte B
Word 2 Word 2
Green Green
bit 24 bit 23 bit 16
Byte 7 Byte A
Word 1 Word 2
Blue Blue
bit 23 bit 16 bit 15 bit 8
Byte 6 Byte 9
Word 1 Word 2
7-5
7
7