Intel® 945G/945GZ/945GC/ 945P/945PL Express Chipset Family ...

1.1 Terminology
Term Description
Accelerated
Graphics Port
(AGP)
Refers to the AGP/PCI interface that was previously in the (G)MCH. It has been
replaced by PCI Express*.
Introduction
ADD Card AGP Digital Display Card. It provides digital display options for an Intel Graphics
Controller that supports ADD cards (DVOs multiplexed with AGP interface). It is keyed
like an AGP 4x card and plugs into an AGP connector. The AGP Digital Display Card
will not work with an Intel graphics controller that implements Intel ® SDVO.
ADD2 Card Advanced Digital Display Card – 2 nd Generation. This card provides digital display
options for an Intel graphics controller that supports ADD2 cards. It plugs into a x16 PCI
Express* connector but uses the multiplexed SDVO interface. This Advanced Digital
Display Card will not work with an Intel graphics controller that supports Intel ® DVO and
ADD cards.
ADD2+ Card Advanced Digital Display Card – 2 nd Generation. This card provides digital display
options for an Intel graphics controller that supports ADD2+ cards. It plugs into a x16
PCI Express connector but uses the multiplexed SDVO interface. The card adds Video
In capabilities to the platform. This Advanced Digital Display Card will not work with an
Intel graphics controller that supports DVO and ADD cards. It will function as an ADD2
card in an ADD2 supported system, but Video In capabilities will not work. This is only
supported on the Intel ® 82945G GMCH.
Core The internal base logic in the (G)MCH
CRT Cathode Ray Tube
DBI Dynamic Bus Inversion
DDR Double Data Rate SDRAM memory technology
DDR2 A second generation Double Data Rate SDRAM memory technology
DMI (G)MCH-Intel ® ICH7 Direct Media Interface
DVI Digital Video Interface. DVI is a specification that defines the connector and interface
for digital displays.
FSB Front Side Bus. FSB is synonymous with Host or processor bus
Full Reset Full reset is when PWROK is de-asserted. Warm reset is when both RSTIN# and
PWROK are asserted.
GMCH Graphics Memory Controller Hub component that contains the processor interface,
DRAM controller, x16 PCI Express port (typically, the external graphics interface), and
an Integrated Graphics Device (IGD). The GMCH communicates with the I/O Controller
Hub 7 (ICH7*) and other I/O controller hubs over the DMI interconnect. In this
document GMCH refers to the Intel 82945G GMCH and/or 82945GZ GMCH
components.
HDMI High Definition Multimedia Interface. HDMI supports standard, enhanced, or highdefinition
video, plus multi-channel digital audio on a single cable. HDMI transmits all
ATSC HDTV standards and supports 8-channel digital audio, with bandwidth to spare
for future requirements and enhancements (additional details available through:
http://www.hdmi.org/)
Host This term is used synonymously with processor.
INTx An interrupt request signal where “x” stands for interrupts A, B, C, and D
Intel ® 82945G/82945G/82945GC GMCH and 82945P/82945PL MCH Datasheet 21