RG82845G S L66F Intel, RG82845G S L66F Datasheet - Page 15

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

Specifications of RG82845G S L66F

• Lead Free Status / RoHS Status: Not Compliant

1.3
Intel
®
82845G/82845GL/82845GV GMCH Datasheet
Intel
Figure 1-1
is designed for use in a desktop system based on an Intel
package. The 845G chipset supports the Pentium 4 processor with 256-KB L2 cache and the
Pentium 4 processor with 512-KB L2 cache on 0.13 micron process. The processor interface
supports the Pentium 4 processor subset of the Extended Mode of the Scalable Bus Protocol. In an
845G chipset-based platform, I/O functions are integrated onto the ICH4.
The chipset platform supports either the integrated graphics device (IGD) on the GMCH or an
external graphics device on AGP. The IGD has 3D, 2D, and video capabilities. The IGD also has
two multiplexed Intel DVO ports to support DVO devices. The GMCH’s AGP interface supports
1X/2X/4X AGP data transfers and 2X/4X AGP Fast Writes, as defined in the Accelerated Graphics
Port Interface Specification, Revision 2.0 for 1.5 V signaling.
In an 845G chipset, system memory can be either a single channel of SDR (Single Data Rate)
SDRAM or DDR (Double Data Rate) SDRAM, with a 64-bit wide data bus. The system memory
size can be up to 2 GB.
Section 1.4
of the ICH4.
Intel
The ICH4 is a highly integrated multifunctional I/O Controller Hub that provides the interface to
the PCI Bus and integrates many of the functions needed in today’s PC platforms. The GMCH and
ICH4 communicate over a dedicated hub interface. The 82801DB ICH4 functions and capabilities
include:
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PCI Rev 2.2 compliant with support for 33 MHz PCI operations
Supports up to 6 Request/Grant pairs (PCI slots)
Power management logic support
Enhanced DMA controller, interrupt controller, and timer functions
Integrated IDE controller; Ultra ATA/100/66/33
USB host interface; 3 host controllers and supports 6 USB ports; includes a EHCI high-speed
2.0 USB controller
Integrated LAN controller
System Management Bus (SMBus) compatible with most I
master and slave capability
AC ’97 2.3 supported for audio and telephony codecs; up to 6 channels
Low Pin Count (LPC) interface
FWH Interface (FWH Flash BIOS support)
Alert on LAN* (AOL and AOL2)
®
82801DB I/O Controller Hub 4 (ICH4)
®
shows an example block diagram of an 845G chipset-based platform. The 845G chipset
845G Chipset System Overview
provides an overview of the GMCH. The following sub-section provides an overview
®
Pentium
2
C devices; ICH4 has both bus
®
4 processor in a 478-pin
Introduction
15