Datasheet

Intel
®
82845G/82845GL/82845GV GMCH Datasheet 11
Intel
®
82845G GMCH Features
■ 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
■ 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
■ 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
■ 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)
■ Analog Display Support
— 350 MHz Integrated 24-bit RAMDAC
— Up to 2048x1536 at 60 Hz refresh
— Hardware Color Cursor Support
— DDC2B Compliant Interface
■ 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
■ 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
■ GMCH Package
— 37.5 mm x 37.5 mm FC-BGA package with 1 mm ball
pitch