GM5020 Datasheet, PDF (62/86 Pages) List of Unclassifed Manufacturers – Graphics Processing IC providing high-quality images for LCD monitors and other pixelated displays

Genesis Microchip
gm5020 / gm5020-H Data Sheet
4.15 OSD
Analog
RGB
Triple
ADC
Clock
Recovery
Digital
DVI
DVI
Rx
Digital YUV
Video
ITU656
(8-bits) Decoder
HDCP
.
Serial
Interface
SDRAM
Interface
Image
Capture
Host
Interface
Micro-
processor
(MCU)
Frame
Store
Interface
YUV
RealColor
Controls
RGB
Color
Controls
Input
Color
LUT
Frame Rate
Conversion
Image
Measurement
OSD
Zoom/
Shrink
Scaling
Gamma
Correction
LUT
Panel
Display Timing Interface
& Control
(24/48-bits)
Display
Clock
Generation
Figure 45. OSD Block
The gm5020 OSD controller supports both character-mapped and bitmapped modes. A user
programmable palette of 256 true colors (255 colors, + 1 transparent) is available.
In character mapped mode, a maximum of four colors per character are available.
In 8-bit bitmapped mode, any pixel can be assigned any one of 256 user-defined true colors. In
4-bit bitmapped mode, any pixel can be assigned any one of 16 user-defined true colors (15
colors plus one transparent).
4.15.1 Character Mapped OSD
Font
Font Type
Location
Resident
(SRAM)
External
(SDRAM)
1-bit / pixel
1-bit / pixel
90⁰ rotated
2-bits / pixel
1-bit/pixel
1-bit/pixel
90⁰ rotated
User-Definable Font Characteristics
Max Number of
Font Colors
1 + background
Max Character
Size in Pixels
(horz x vert)
12 x 18
Definable Characters
per Table
256
Max Number of Font
Tables
1
1+ background 16 x 12
192
1
3 + background
1+ background
12 x 18
16 x 24
128< # <=256
256
1
4 (+ 1 SRAM) *
1+ background 24 x 16
256
4 (+ 1 SRAM) *
2-bits / pixel 3+ background 16 x 24
256
4 (+ 1 SRAM) *
2-bits / pixel 3+ background 24 x 16
256
90⁰ rotated
* may be switched on a from row-by-row basis, must be same sized tables
4 (+ 1 SRAM) *
February 2002
53
C5020-DAT-01Q