Intel D15343-003 User Manual

Page 18

Intel

82854 Graphics Memory Controller Hub (GMCH)

D15343-003

Intel 82801DBM ICH4-M

The component contains the primary PCI interface, LPC interface, USB 2.0,
ATA-100, AC’97, and other I/O functions. It communicates with the Intel

82854

GMCH over a proprietary interconnect called the Hub interface. Throughout this
datasheet, the Intel 82801DBM ICH4-M component will be referred to as the
ICH4-M

IPI

Inter Processor Interrupt

LCD

Liquid Crystal Display

MSI

Message Signaled Interrupts. MSI allow a device to request interrupt service via
a standard memory write transaction instead of through a hardware signal

Native Graphic Mode

The Intel

82854 GMCH can support RGB and Dual Independent Display in this

mode

PWM Pulse

Width

Modulation

Standard definition, typically MP@ML for MPEG2

SSC

Spread Spectrum Clocking

STB

Set Top Box

System Bus

Processor-to-Intel

82854 GMCH interface. The Enhanced mode of the

Scalable bus is the P6 Bus plus enhancements, consisting of source
synchronous transfers for address and data, and system bus interrupt delivery.
The Intel Celeron M processor implements a subset of Enhanced mode.

UMA

Unified Memory Architecture with graphics memory for the IGD inside system
memory

VDL

Video Data Link