MB87P2020 Datasheet, PDF (153/356 Pages) Fujitsu Component Limited. – Colour LCD/CRT/TV Controller

Graphic Processing Unit
from SDC
Fetch FSM
to SDC
to CBP
Register Set w/ FrameLock
Input FIFO
PixelPump
to CCU
Figure 1-2: DFU structure. Pixel data is transported from SDC via the FetchFSM to the Input FIFO.
From there it is read out by the PixelPump and fed into CCU. The register set contains all necessary
geometric and color space values to fetch the pixels. Some of the registers are double-buffered and
updated on a per-frame basis.
1.2.3 CCU Function
The CCU (Color Conversion Unit) handles all transformations necessary to convert the layers displayed
from their respective color space to one common color space. Further, special colors for each layer can be
defined that trigger transparency and blinking. These colors are detected by the CCU and the appropriate
action is carried out.
to CBP
Blinkers
Register Set
from DFU
ColorConv
CLUT
SpaceMap
to LSA
Matrix
GamTbl
Duty Ratio
Modulator
Figure 1-3: CCU structure. Pixel data is fed in by DFU and travels through ColorConv, optionally
through CLUT, and is prepared by SpaceMap for output to LSA.
The CCU contains seven functional sub-units plus its own register set. This register set stores all layer-spe-
cific color information which control the transformations. Figure 1-3 shows the structure of the CCU. The
Blinkers component provides a pulse-width modulated blink signal for each layer. In the ColorConv com-
ponent blink and transparent colors are detected. The CLUT (Color Look-Up Table) is used to convert lay-
ers with color resolutions of less than or equal to 8 bits to higher resolutions. There is only one CLUT for
Functional Description
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