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參數(shù)資料
| 型號： | 82865G |
| 廠商： | Intel Corp. |
| 英文描述： | Intel 865G/865GV Graphics and Memory Controller Hub |
| 中文描述： | 英特爾865G/865GV圖形和內(nèi)存控制器中樞 |
| 文件頁數(shù)： | 177/249頁 |
| 文件大?。?/td> | 3540K |
| 代理商： | 82865G |
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178
Intel
82865G/82865GV GMCH Datasheet
Functional Description
The GMCH multiplexes an ADD_DETECT signal with the GPAR signal on the AGP bus. This
signal acts as a strap and indicates whether the interface is in AGP or DVO mode. The GMCH has
an internal pull-up on this signal that will naturally pull it high. If an ADD card is present, the
signal will be pulled low on the ADD card and the AGP/DVO multiplex select bit in the
GMCHCFG register will be toggled to DVO mode. Motherboards that do not use an AGP
connector should have a pull-down resistor on ADD_DETECT if they have digital display devices
connected to the AGP/DVO interface.
5.5.2.1.1
ADD Card
When an 865G chipset platform uses an AGP connector, the multiplexed DVO ports may be used
via an ADD card. The ADD card will be designed to fit a standard 1.5 V AGP connector.
5.5.2.1.2
TMDS Capabilities
The GMCH is compliant with
Digital Visual Interface (DVI) Specification, Revision 1.0
. When
combined with a DVI compliant external device and connector, the GMCH has a high-speed
interface to a digital display (e.g., flat panel or digital CRT). When combining the two multiplexed
DVO ports, the GMCH can drive a flat panel up to 2048x1536 or a dCRT/HDTV up to 1920x1080.
Flat Panel is a fixed resolution display. The GMCH supports panel fitting in the transmitter,
receiver or an external device, but has no native panel fitting capabilities. The GMCH, however,
provides unscaled mode where the display is centered on the panel.
5.5.2.1.3
LVDS Capabilities
The GMCH can use the multiplexed DVO ports to drive an LVDS transmitter. The flat panel is a
fixed resolution display. While the GMCH supports panel fitting in the transmitter, receiver, or an
external device, it has no native panel fitting capabilities. The GMCH, however, provides unscaled
mode where the display is centered on the panel. The GMCH supports scaling in the LVDS
transmitter through the DVOB (or C)_STL pin, which is multiplexed with DVOB (or C)_FLD.
5.5.2.1.4
TV-Out Capabilities
While traditional TVs are not digital displays, the GMCH uses a digital display channel to
communicate with a TV-Out transmitter. For this reason, the GMCH considers a TV-Output to be a
digital display. GMCH supports NTSC/PAL/SECAM standard definition formats. The GMCH
generates the proper timing for the external encoder. The external encoder is responsible for
generation of the proper format signal. Since the multiplexed DVO interface is 1.5 V, care should
be taken to ensure that the TV encoder is operational at that signaling voltage.
A NTSC/PAL/SECAM display on the TV-Out port can be configured to be the boot device. It is
necessary to ensure that appropriate BIOS support is provided.
The TV-Out interface on the GMCH is addressable as a master device. This allows an external TV
encoder device to drive a pixel clock signal on DVOBC_CLKINT# that the GMCH uses as a
reference frequency. The frequency of this clock is dependent on the output resolution required.
Data is driven to the encoder across 12 data lines, along with a clock pair and sync signals. The
encoder can expect a continuous flow of data from GMCH because data will not be throttled.
Flicker Filter and Overscan Compensation
The overscan compensation scaling and the flicker filter is done in the external TV encoder chip.
Care must be taken to allow for support of TV sets with high performance de-interlacers and
progressive scan displays connected to by way of a non-interlaced signal. Timing will be generated
with pixel granularity to allow more overscan ratios to be supported.
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相關(guān)代理商/技術(shù)參數(shù) |
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| 82865GV | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Intel 865G/865GV Graphics and Memory Controller Hub |
| 82865N | 功能描述:HEX DIE 5/8-11 制造商:apex tool group 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1 |
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| 82866N | 功能描述:HEX DIE 5/8-18 制造商:apex tool group 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1 |
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