參數(shù)資料
型號： 82815EM
英文描述： Controller Miscellaneous - Datasheet Reference
中文描述： 控制器雜項-數(shù)據(jù)表參考
文件頁數(shù)： 142/163頁
文件大?。?/td> 1049K
代理商： 82815EM
Intel
82815EM GMCH
R
142
Datasheet
4.12.12. Digital Video Out (DVO) Port
The Digital Video Out (DVO) port is an Intel
standard. This port is a 16 bit digital port (4 control bits
and 12 data bits). The DVO Port is a scaleable low voltage interface that ranges from nominal 1.1V to
1.8V. It consists of a single interface that can serve as either a TV-Out or Digital-Out interface.
TV-Out interface is an output of PC graphics controller to one of many possible connections to analog
video standard (NTSC or PAL) that can be connected to a TV monitor, VCR or other video devices. This
is accomplished by using a TV Encoder device that encodes the digital pixel data generated by the
graphics controller into a usable video signal. Depending on the capabilities of the TV Encoder, this may
be NTSC or PAL TV format.
The Digital-Out interface is an output of the PC graphics controller to the Digital TFT (Thin-Film-
Transistor) Flat Panel or Digital CRT monitor. This is accomplished by using a TMDS (Transition
Minimized Differential Signaling) device that transmits the digital pixel data generated by the graphics
controller into a TMDS interface.
4.12.12.1. VCH interface
For mobile applications, this DVO port can be connected to the VCH chip that has integrated LVDS and
panel fitting logic. The VCH provides direct flat panel interface via LVDS (or CMOS) signaling and can
be set to bypass the DVO stream (DVOr) to support other DVO devices to the platform. When used with
the VCH, a LTVCLKIN/STALL signal is used for panel fitting flow control.
This DVO port is used to stream the primary and overlay surfaces to an LCD Display, TV, or digital
display. This is accomplished by providing the interface to the discrete TV Encoder, discrete TMDS
Transmitter, or integrated TV Encoder & TMDS Transmitter, all of which are external to the GMCH2-
M. Simultaneous operation of the LCD Panel and the DVO bypass is not allowed. However, switching
between TV Display and LCD Display modes is possible at any time, and will not require the device to
be powered down.
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