QG82945GSE S LB2R Intel, QG82945GSE S LB2R Datasheet - Page 47

• Manufacturer Part Number: QG82945GSE S LB2R
• Description: GRAPHICS AND MEM CNTRL HUB; No. of Pins: 998; Package / Case: FCBGA; Interface Type: PCI, SATA, USB
• Manufacturer: Intel

Signal Description
2.5.2
Datasheet
Analog TV-out Signals
CRT_BLUE
CRT_BLUE#
CRT_IREF
CRT_HSYNC
CRT_VSYNC
TVDAC_A
TVDAC_B
TVDAC_C
TV_DCONSEL[1:0]
TV_IRTNA
TV_IRTNB
TV_IRTNC
TV_IREF
Signal Name
Signal Name
Type
O
O
O
O
O
A
A
A
A
A
Type
O
O
O
O
O
O
O
O
A
A
A
A
A
A
A
A
BLUE Analog Video Output:
This signal is a CRT Analog video output from the internal color
palette DAC. The DAC is designed for a 37.5-Ω equivalent load on
each signal (e.g., 75-Ω resistor on the board, in parallel with a
75-Ω CRT load).
BLUE# Analog Output:
This signal is an analog video output from the internal color
palette DAC. This signal is used to provide noise immunity.
Resistor Set:
Set point resistor for the internal color palette DAC. A 255 Ω, 1%
resistor is required between CRT_IREF and motherboard ground.
CRT Horizontal Synchronization:
This signal is used as the horizontal sync (polarity is
programmable) or ìsync interval.
CRT Vertical Synchronization:
This signal is used as the vertical sync (polarity is programmable).
TVDAC Channel A Output:
TVDAC_A supports the following:
Composite: CVBS signal
Component: Chrominance (Pb) analog signal
TVDAC Channel B Output:
TVDAC_B supports the following:
S-Video: Luminance analog signal
Component: Luminance (Y) analog signal
TVDAC Channel C Output:
TVDAC_C supports the following:
S-Video: Chrominance analog signal
Component: Chrominance (Pr) analog signal
TV D-connector Select:
Supports 525i, 525p, 750p, 1125i and 1125p
Note: This signal is Not on the Ultra Mobile Intel 945GU
Express Chipset.
Current Return for TVDAC Channel A:
Connect to ground on board
Current Return for TVDAC Channel B:
Connect to ground on board
Current Return for TVDAC Channel C:
Connect to ground on board
TV Reference Current:
Uses an external resistor of 5 kΩ ±1% to set internal voltage
levels
Description
Description
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