MB87P2020 Datasheet, PDF (165/356 Pages) Fujitsu Component Limited. – Colour LCD/CRT/TV Controller

Graphic Processing Unit
Table 3-2: Merging Description Record. (Continued)
Information
Size (bits)
14 RGB Gamma Forcing (Jasmine only)
1
Flag to force pixels from RGB555, RGB565, RGB888 through the gamma table,
valid only when gamma table enable is set.
15 YUV422 Chroma interpolation enable (Jasmine only)
1
Since in logical color space YUV422 two pixels share their chrominance infor-
mation linear interpolation between pairs of adjacent pixels is used to smooth the
appearance of the picture.
a. For MB87J2120 (Lavender).
b. For MB87P2020-A (Jasmine).
Remark: The purpose of the background color and Z-order register is a clearer concept of visibility, a more
user-friendly programming interface and a unified handling of all layers. If there was no Z-order register
the user still would be able to swap layers by changing their respective VideoRAM start addresses. How-
ever, this would require more accesses than the single access to the Z-order register.
Foreground
Plane 3 [Layer c ]
Plane 2 [ Layer b ]
Plane 1 [ empty ]
Plane 0 [ Layer a ]
Z-order register
Background
Figure 3-2: Illustration for Z-order register.
Layer a
Layer b
background color
Layer c
3.3 Display Interface Record
This group of data contains information necessary to describe the geometric and timing behaviour of the
physical display as well as timing data to generate various synchronization signals.
Table 3-3: Display Interface Record.
Information
1 Display physical size PX, PY
2 Color space code
For physical color space, see 3.12.1
3 Bit stream format code
Defines the number of bits written per video clock period (see section 3.12.2)
4 Scan mode
Distinction between single / dual scan, special “Optrex-mode”
Size (bits)
2 x 14
4
4
2
GPU Control Information
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