AL250
Video Scan Doubler
Applications
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TV Ready Multimedia Computer Monitor
TV to PC Video Scan Converter Box
Progressive Scan TV
Video Game Station
DVD Player
Portable VCD Player
LCD Monitor w/VGA Input
Video Based Set-top Box
LCD Projector
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Convert interlaced YUV/RGB (NTSC/PAL) into
non-interlaced RGB format for CRT or LCD
monitors
Highly integrated design with built-in DAC, SRAM,
OSD and LUT
Built-in on-screen-display with programmable bitmap
Advanced digital line interpolation with no tearing or
jagged edge artifacts
Reduced interlace flicker
Auto NTSC/PAL detect
Digital video input of square pixel, ITU-R BT 601
(CCIR 601), or user-defined format
I
2
C programming interface
Internal RGB video lookup table (LUT) to provide
gamma correction
Overlay support for title making and complex on-
screen display
Self-initialization without software (Plug & Play)
3.3 or 5 volt support
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Description
The AL250 Video Scan Doubler (De-
Interlacer) is a video conversion chip for
consumer
video
and
multimedia
applications. It converts interlaced NTSC
or PAL, ITU-R BT 601 (CCIR601) or
square pixel, YUV422 or RGB565 digital
signals into computer monitor RGB
signals for direct connection to a
computer monitor or progressive scan TV.
Video Memory
On-screen
Display
8-bit DAC
R
G
B
Digital
YUV or RGB
input
16
Video
Formatter
Video Processor
and Scan Doubler
RGB
Video
Lookup
Tables
8-bit DAC
8-bit DAC
VCLK
VCLKX2
VIDHS
VIDVS
HREF
Timing
Control
RSET
I
2
C Circuit
2
Mode Control
VREF
COMP
I
2
CADDR
INTYPE
GHS
GVS
STD
OVLCTRL
SQUARE
SDA
SCL
GHREF
RESET
AL250-01
A
VER
L
OGIC
T
ECHNOLOGIES
, I
NC
. E-mail: sales_usa@averlogic.com
A
VER
L
OGIC
T
ECHNOLOGIES
, C
ORP
. E-mail: sales@averlogic.com.tw
URL: www.averlogic.com
URL: www.averlogic.com.tw
February 25, 2003
AVERLOGIC [ AVERLOGIC TECHNOLOGIES INC ]
