MB87P2020 Datasheet, PDF (183/356 Pages) Fujitsu Component Limited. – Colour LCD/CRT/TV Controller

Graphic Processing Unit
3.13 Bit to Color Channel Assignment
Table 3-13 gives the assignment of the bits to color channels (RGB or YUV) corresponding to bit width
(i.e. the number of bits occupied by one pixel) as used GPU internal for chromatic intermediate and physical
color spaces. This assignment is important for direct mapping (to determine which GDC pins carry the de-
sired signal) and for CLUT and gamma table loading.
Table 3-13: Bit to RGB/YUV assignment for chromatic color spaces.
Color
Bits assigned to
space
R
G
B
Y U(Cb) V(Cr)
RGB111^a
[2]
[1]
[0]
RGB111^b
[0]
[1]
[2]
RGB222
[5:4] [3:2] [1:0]
8bpp^c
[7:5] [4:2] [1:0]
RGB333
[8:6] [5:3] [2:0]
RGB444
[11:8] [7:4] [3:0]
RGB555 [15:11] [10:6] [4:0]
RGB565 [15:11] [10:5] [4:0]
RGB666 [17:12] [11:6] [5:0]
RGB888 [23:16] [15:8] [7:0]
YUV422^d
[15:8]
[7:0]
YUV444
[15:8] [7:0] [23:16]
YUV555^e
[10:6] [4:0] [15:11]
YUV655^e
[10:5] [4:0] [15:11]
a. Default assignment with no R/B swap
b. Alternative assignment with active R/B swap
c. This assignment is valid only when 8bpp is mapped aligned to intermedi-
ate RGB333
d. Bits [7:0] contain U and V alternating for every other pixel.
e. This format is only available for MB87P2020-A (Jasmine).
GPU Control Information
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