AC82G41SLGQ3 Datasheet, PDF (535/604 Pages) Intel Corporation – Intel® 4 Series Chipset Family

Functional Description
13.5
13.5.1
Table 35.
Display Interfaces
(Intel^® 82Q45, 82Q43, 82B43, 82G45, 82G43,
82G41 GMCH Only)
The GMCH has three display ports, one analog and two digital ports B and C. Each port
can transmit data according to one or more protocols. The digital ports B and C can be
configured to drive natively HDMI, DVI and Display Port or can be connected to an
external device (SDVO) that converts one protocol to another. Examples of SDVO
devices are TV encoders, external DACs, LVDS transmitters, HDMI transmitters, and
TMDS transmitters. Each display port has control signals that may be used to control,
configure and/or determine the capabilities of an external device.
The GMCH has one dedicated display port, the analog port. Digital ports B and C are
multiplexed with the PCI Express Graphics (PEG) interface and are not available if an
external PEG device is in use. The digital ports can also be configured to drive SDVO
data. When a system uses a PEG connector, SDVO ports B and C can be used via an
ADD2 (Advanced Digital Display 2) or MEC (Media Expansion Card).
• The GMCH’s analog port uses an integrated 350 MHz RAMDAC that can directly
drive a standard progressive scan analog monitor up to a resolution of 2048x1536
pixels with 32-bit color at 75 Hz.
• The GMCH’s SDVO ports are each capable of driving a 400 MP pixel rate. Each port
is capable of driving a digital display up to 2560x1600 @ 60Hz.
Integrated HDMI, DVI, and Display Port support multiplexed over PCI Express Graphics
port for native connection to a compatible display.
Analog Display Port Characteristics
The analog display port provides a RGB signal output along with a HSYNC and VSYNC
signal. There is an associated DDC signal pair that is implemented using GPIO pins
dedicated to the analog port. The intended target device is for a CRT based monitor
with a VGA connector. Display devices such as LCD panels with analog inputs may work
satisfactory but no functionality added to the signals to enhance that capability.
Analog Port Characteristics
Signal
Port Characteristic
RGB
HSYNC
VSYNC
DDC
Voltage Range
Monitor Sense
Analog Copy Protection
Sync on Green
Voltage
Enable/Disable
Polarity adjust
Composite Sync Support
Special Flat Panel Sync
Stereo Sync
Voltage
Control
Support
0.7 V p-p only
Analog Compare
No
No
2.5 V
Port control
VGA or port control
No
No
No
Externally buffered to 5V
Through GPIO interface
Datasheet
535