MB87P2020 Datasheet, PDF (162/356 Pages) Fujitsu Component Limited. – Colour LCD/CRT/TV Controller

MB87J2120, MB87P2020-A Hardware Manual
3 GPU Control Information
The following sections describe the information necessary for output of video and picture data on a display
wired to GDC. The tables give only the type of information and its respective size, they do not imply any
assignment to GDC-registers. The intention is to sort information according to their conceptual place of ap-
plication and to group data belonging together.
3.1 Layer Description Record
This group of data describes all information belonging to a single layer l (graphics or video) in VideoRAM
(i.e. within logical color space).
Table 3-1: Layer Description Record
Information
Size (bits)
1 _{Physical address in VRAM}^a
32
The address of the word containing the first pixel of the layer according
to MCU address space.
2 _{Domain size DXl} ^a_{, (DYl)}
Logical area covered by the layer in VideoRAM. DY only pro forma,
the user is responsible for providing enough RAM space per layer.
3 First pixel to be displayed FXl, FYl
Upper left corner of area in VRAM actually to be displayed
4 Display window size WXl, WYl
Size of area to be displayed
5 Display window offset OXl, OYl
Offset of layer area from upper left corner of physical display.
See figure 3-1 for an illustration of geometry.
6 Color space code
See section 3.12.1
7 Transparent color
The color (in logical color space) to be ignored for display
8 Transparency enable
9 Blink color (confirming to 6)
10 Blink alternative color (confirming to 6)
If a pixel in video RAM has a logical color equal to blink color, then it
is displayed alternating in blink color / alternative color. Either color
may also be the transparent color, in this case the pixel and the layer
below it are displayed alternatively.
11 Blink rate
# of frames on, # of frames off
12 Blink enable
a. This information is held in SDC
2 x 14
unsigned
2 x 14
unsigned
2 x 14
unsigned
2 x 14
signed
4
1…24
1
1…24
1…24
2x8
1
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