MB86290A Datasheet, PDF (12/184 Pages) Fujitsu Component Limited. – Graphics Controller Hardware Specifications

1.5.2 Display Controller
Screen resolution
Various resolutions are achieved by using a programmable timing generator
as follows:
Screen Resolutions
Resolution
1024 × 768
1024 × 600
800 × 600
854 × 480
640 × 480
480 × 234
400 × 234
320 × 234
Display colors
There are two pixel color modes (indirect and direct). In the indirect mode,
each pixel is expressed in 8-bit code. The actual display color is referenced
using a color look-up table (color pallet). In this mode, each color of the look-
up table is represented as 17 bits (RGB 6 bits each and independent alpha-
blend bit), and 256 colors are selected from 262,144 colors. In the direct
mode, each pixel is expressed as 16-bit code (RGB 5 bits each and reserved
intensity bit). In this mode, 32,768 colors can be displayed.
TV/Video display
MB86290A can output a graphics image synchronized with external
TV/video display signals. The graphics image can be overlapped at any area
on the TV/video display window. MB86290A outputs a control signal to
switch the display window externally. This scheme supports both interlace
and non-interlace.
Ov e rlay
Up to three extra layers can be overlaid on the base window. When multiple
layers are overlaid, the lower layer image can be displayed according to the
setting of the transparency option. Any codes in the color pallet can be
assigned a transparent color. Code 0 in the indirect mode or color value 0 in
the direct mode sets this transparent option.
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