Genesis Microchip
165 Commerce Valley Dr. West , Thornhill, ON Canada L3T 7V8 Tel: (905) 889-5400 Fax: (905) 889-0035
2150 Gold Street , Alviso, CA USA 95002 Tel: (408) 262-6599 Fax: (408) 262-6365
www.genesis-mi crochip.c om / info@genesis-m i crochip.com
GENESIS Pegasus Multimedia CRT
MICROCHIP
Features
• Genesis gmVLX1A-X proprietary high quality
video scaling and de-interlacing including AFM,
vertical/temporal (VT) and static mesh
processing.
• Genesis gmAFMC Adaptive Film Mode (AFM)
processing.
• Techwell TW98 video decoder accepts
composite/YC baseband video inputs in
NTSC/PAL formats.
• On board tuner demodulates off-air RF NTSC
System M/N inputs.
• Supports 640x480 VGA, 800x600 SVGA and
1024x768 XGA analog RGB outputs. Suitable
as video processor for multiple frequency
capable computer monitors.
• Stereo audio inputs/outputs.
• T ext/ic on based On- scr een Display (OSD) m enu
system provides user control of source
selection, image parameters, audio levels etc.
• 8-bit 8051-based MCU for system control.
• Infrared remote control receiver.
Applications
• Multimedia computer monitors
Description
The Genesis Microchip Pegasus Multimedia Monitor
Video Processor Board provides the video processing
functions for a high quality, low cos t multim edia computer
monitor. Utilizing the Genesis gmVLX1A-X and gmAFMC
ICs, the system de-interlaces and scales interlaced video
for viewing on a multiple frequency capable computer
CRT.
NTSC and PAL composite and S-video (YC) baseband
video inputs are decoded by the TW98. T he T W98’s two
10-bit A/D converters and signal processing controls
enhance the detail of video signals to compensate for
VCR or TV tuner picture degradation. An onboard tuner
demodulates RF System M (NTSC) inputs for off-air
reception.
Pegasus Multimedia provides 640x480 VGA, 800x600
SVGA or 1024x768 XGA RGB analog outputs. User
control is provided by a keypad (or optional IR remote)
and an on-screen display (OSD) menu system.
Selection of the output resolution is via the OSD. The
user also has control of image contrast, brightness,
sharpness, audio volume/mute, channel selection etc.
via OSD menus controlled by an 8-bit system MCU and
a dedicated OSD generator.
The system MCU provides input mode monitoring,
system initialization, keypad scanning, infrared remote
(IR) support etc. The on-board ICs, including an RF
tuner, OSD controller, TW98 video decoder and
gmVLX1A-X scaler/de-interlacer are controlled by the
system MCU via a serial communications interface.
B0056-PBR-02C April 2000
Product Brief
MULTIMEDIA COMPUTER MONITOR
VIDEO PROCESSOR BOARD
Multimedia Monitor Video Processor Product Brief B0056-PBR-02C
Page 2 of 3
Multimedia M onitor Processor Block Diagram
48:24
Mux
OSC
Debug I/F
P10
+12V
Power
Supply +3.3V
+5V
8051
1 x
SGRAM
EEPROM
CLK
H/V
24
OSC
Serial I/O
Serial I/O
Serial I/O
GPIO
Video
Decoder
P2
RGB
DCLK
HS
VS
DV
HBLK
VBLK
+12 V
3
B
AA/B
CLK
HS
VS FBKGC
RGB
OSD
(MC141584)
gmVLX1A-X
P12
Serial I/O
TV/FM
Tuner
(Temic 3X7246)
2:1
mux
Tuner
P7
RF
(TV/FM)
Serial I/O
24
P11
LCD
Backlight
Backlight
Enable
Audio
Amp
P
8
P
9
R
L
R
Serial I/O
Left
Audio
Right
Audio
Comp/Y
P
5
P
6
2:1
Mux
Audio L
Audio R
L
Video In
IR
Rcvr
Serial I/O
P1 YC
Keypad
P13
Keypad
gmAFMC
Serial I/O
VGA
16
Multimedia Monitor Video Processor Product Brief B0056-PBR-02C
Page 3 of 3
Multimedia Monitor Supported Inputs
BASEBAND VIDEO INPUT
Analog Video Input Decoded Digital Video
Signal Format(1) Horiz. Freq.
(kHz) Vertical
Freq.
(Hz)
Active Resolution
(Pixels x lines @ Field/Frame
Rate, Hz)
Total
(Pixels x
Lines)
Pixel Clock
(MHz)
4:3, 16:9
Composite/YC NTSC 15.734 59.940 720x240 @ 59.94 I 858x525 13.500
4:3, 16:9
Composite/YC PAL 15.625 50.000 720x288 @ 50 I 864x625 13.500
RF VIDEO INPUT
Analog Video Input Demodulated Video
Signal Format Freq.
(MHz) Channels Signal Format Horiz.
Freq.
(kHz)
Vertical
Freq.
(Hz)
RF Modulated System M 55.25-
801.25 2-69
VHF-UHF 4:3.16:9 Composite NTSC 15.734 59.940
FM INPUT
Audio Input Demodulated Audio
Signal Format Freq.
(MHz) Signal Format Freq.
Response
FM Radio Broadcast 76.0-108.0 Stereo L & R outputs 20-18 kHz
NOTES :
1. For each SD signal format, 4:3 & 16:9 aspect modes indistinguishable. User selection required. 16:9 input is 16:9
letterbox on 4:3 raster.
Multimedia Monitor Supported Output Display Formats
PROGRESSIVE TELEVISION
Resolution Signal Format Active Resolution
(Pixels x lines @
Field/Frame Rate, Hz)
Horiz. Freq.
(kHz) Vertical
Freq.
(Hz)
VGA RGB 640x480 @ 59.94 31.469 59.94
SVGA RGB 800x600 @ 59.94 37.879 59.94
XGA RGB 1024x768 @ 59.94 48.363 59.94
