RG82845G S L66F Intel, RG82845G S L66F Datasheet - Page 35

• Manufacturer Part Number: RG82845G S L66F
• Manufacturer: Intel

Specifications of RG82845G S L66F

• Lead Free Status / RoHS Status: Not Compliant

2.6
Intel
®
82845G/82845GL/82845GV GMCH Datasheet
Analog Display
HSYNC
VSYNC
RED
RED#
GREEN
GREEN#
BLUE
BLUE#
REFSET
DDCA_CLK
DDCA_DATA
Signal Name
Analog
Analog
Analog
Analog
Analog
Analog
Analog
GPIO
GPIO
GPIO
GPIO
Type
3.3 V
3.3 V
3.3 V
3.3 V
I/O
I/O
O
O
O
O
O
O
O
O
I
CRT Horizontal Synchronization: This signal is used as the horizontal sync
(polarity is programmable) or “sync interval”.
CRT Vertical Synchronization: This signal is used as the vertical sync (polarity
is programmable).
RED 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).
RED# Analog Output: This signal is a truly differential analog video output from
the internal color palette DAC. Refer to the Intel
Pin Package and Intel
routing recommendations. This signal is used to provide noise immunity.
GREEN 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).
GREEN# Analog Output: This signal is a truly differential analog video output
from the internal color palette DAC. Refer to the Intel
478-Pin Package and Intel
Guide for routing recommendations. This signal is used to provide noise
immunity.
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 a truly differential analog video output
from the internal color palette DAC. Refer to the Intel
478-Pin Package and Intel
Guide for routing recommendations. This signal is used to provide noise
immunity.
Resistor Set: Set point resistor for the internal color palette DAC. A 137 Ω, 1%
resistor is required between REFSET and GND.
Analog DDC Clock: Clock signal for the I
Analog CRT Display.
NOTE: This signal may need to be level shifted to 5 V.
Analog DDC Data: Data signal for the I
Analog CRT Display.
NOTE: This signal may need to be level shifted to 5 V.
®
845G/845GL/845GV Chipset Platform Design Guide for
®
®
845G/845GL/845GV Chipset Platform Design
845G/845GL/845GV Chipset Platform Design
Description
2
C style interface that connects to
2
C style interface that connects to
®
Pentium
®
®
Pentium
Pentium
Signal Description
®
4 Processor in 478-
®
®
4 Processor in
4 Processor in
35