Mitac secret confidential document – MiTAC 8050QMA User Manual
Page 84
83
80
80
50QMA
50QMA
N/B Maintenance
N/B Maintenance
5.1 Intel 915PM North Bridge(6)
CRT DAC Signals
Signal Name
Type
Description
RED
O
A
RED Analog Video Output:
This signal is a CRT Analog video output from the internal color
palette DAC.
RED#
O
A
RED# Analog Output:
This signal is an analog video output from the internal color palette
DAC. This signal is used to provide noise immunity.
GREEN
O
A
GREEN Analog Video Output:
This signal is a CRT Analog video output from the internal color
palette DAC.
GREEN#
O
A
GREEN# Analog Output:
This signal is an analog video output from the internal color palette
DAC. This signal is used to provide noise immunity.
BLUE
O
A
BLUE Analog Video Output:
This signal is a CRT Analog video output from the internal color
palette DAC.
BLUE#
O
A
BLUE# Analog Output:
This signal is an analog video output from the internal color palette
DAC. This signal is used to provide noise immunity.
REFSET
O
A
Resistor Set:
Set point resistor for the internal color palette DAC. A 256-Ω ± 1%
resistor is required between REFSET and motherboard ground.
HSYNC
O
HVCMOS
CRT Horizontal Synchronization:
This signal is used as the horizontal sync (polarity is programmable)
or “sync interval”.
VSYNC O
HVCMOS
CRT Vertical Synchronization:
This signal is used as the vertical sync (polarity is programmable).
Analog TV-out Signals
Signal Name
Type
Description
TVDAC_A
O
A
TVDAC Channel A Output:
TVDAC_A supports the following:
Composite: CVBS signal
Component: Chrominance (Pb) analog signal
TVDAC_B
O
A
TVDAC Channel B Output:
TVDAC_B supports the following:
S-Video: Luminance analog signal
Component: Luminance (Y) analog signal
TVDAC_C
O
A
TVDAC Channel C Output:
TVDAC_C supports the following:
S-Video: Chrominance analog signal
Component: Chrominance (Pr) analog signal
TV_IRTNA
O
A
Current Return for TVDAC Channel A:
Connect to ground on board
TV_IRTNB
O
A
Current Return for TVDAC Channel B:
Connect to ground on board
TV_IRTNC
O
A
Current Return for TVDAC Channel C:
Connect to ground on board
TV_REFSET
O
A
TV Resistor set:
TV Reference Current uses an external resistor to set internal
reference voltage levels. A 5-k §Ù ± 0.5% resistor is required
between REFSET and motherboard ground.
MiTac Secret
Confidential Document