845GL datasheet(11/193 Pages) INTEL

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Intel® 82845G/82845GL/82845GV GMCH

Datasheet

Intel® 82845G GMCH Features

I Host Interface Support

• One processor in a mPGA478 package

• Hyper-Threading Technology support

• 400/533 MHz PSB (100/133 MHz bus clock)

• PSB Dynamic Bus Inversion on the data bus

• 32-bit addressing for access to 4 GB of memory space

• 8 deep In Order Queue

• AGTL+ On-die Termination

I System Memory Controller (SDR and DDR)

— One, 64-bit wide SDR or DDR SDRAM data channel

— Bandwidth up to 1 GB/s (SDR), and 2.1 GB/s (DDR266)

— Configurable to support either a DDR board or an SDR

board

— 64-Mb, 128-Mb, 256-Mb, and 512-Mb SDRAM

technologies

— Supports only x8 and x16 SDRAM devices with four

banks

— Unbuffered, unregistered 184-pin non-ECC DDR

SDRAM DIMMs only

— Opportunistic refresh

— Up to 16, simultaneously open pages

— SPD (Serial Presence Detect) scheme for DIMM

detection

— Suspend-to-RAM support using CKE

— Double Data Rate (DDR) SDRAM Configuration

- Up to 2.0 GB of 200 MHz or 266 MHz DDR SDRAM

- Two DDR DIMMs, single-sided and/or double-sided

- DDR200/266 unregistered, 184-pin non-ECC DDR

SDRAM DIMMs

- JEDEC DDR DIMM specification configurations only

- Does not support double-sided x16 DDR DIMMs

- Selective Command-Per-Clock (selective CPC)

accesses.

— Single Data Rate (SDR) SDRAM Configuration

- Up to 2.0 GB of 133 MHz SDR SDRAM

- Up to two SDR DIMMs, single-sided and/or

double-sided

- PC133 unregistered 168-pin non-ECC SDR SDRAM

DIMMs

- Does not support PC100

- Mixed-mode/uneven double-sided SDR DIMMs

not supported

- 3.3 V SDR DIMM configurations only

I AGP Interface

— Supports a single 1.5 V Accelerated Graphics Port

Interface, Specification 2.0-compliant device

— Supports 1X/2X/4X data transfers and 2X/4X Fast

Writes

— 32-deep AGP request queue

— AGP signals muxed with two Intel® DVO ports:

Supports ADD cards

I Integrated Graphics

— Core Frequency of 200 MHz

— 3D Setup and Render Engine

- Discrete Triangles, Strips and Fans Support

- Indexed Vertex and Flexible Vertex Formats

- Pixel Accurate Fast Scissoring and Clipping Operation

- Backface Culling Support

- Supports D3D and OGL Pixelization Rules

- Anti-Aliased Lines Support

- Sprite Points Support

— High Quality Texture Engine (see Section 1.4.5)

— 3D Graphics Rasterization Enhancements (see

Section 1.4.5)

— 2D Graphics (see Section 1.4.5)

— Video DVD/PC-VCR (see Section 1.4.5)

— Video Overlay (see Section 1.4.5)

I Analog Display Support

— 350 MHz Integrated 24-bit RAMDAC

— Up to 2048x1536 at 60 Hz refresh

— Hardware Color Cursor Support

— DDC2B Compliant Interface

I Digital Display Channels

— Two channels multiplexed with AGP

— 165 MHz dot clock on each 12-bit interface

— Can combine two, 12-bit channels to form one 24-bit

interface: Supports flat panels up to 2048x1536 at 60 Hz

or dCRT/HDTV at 1920x1080 at 85 Hz

— Supports Hot Plug and Display

— Supports LVDS, TMDS transmitters or TV-out encoders

— ADD card utilizes AGP connector

— Three Display Control interfaces (I2C/DDC)

multiplexed on AGP

I Hub Interface

— Supports Hub Interface 1.5

— 266 MB/s point-to-point Hub Interface to the ICH4

— 66 MHz base clock

— 1.5 V operation

I GMCH Package

— 37.5 mm x 37.5 mm FC-BGA package with 1 mm ball

pitch

845GL Datasheet(PDF) 11 Page - Intel Corporation

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