参数资料
| 型号： | HW-XGI-VIDEO-US |
| 厂商： | Xilinx Inc |
| 文件页数： | 33/68页 |
| 文件大小： | 0K |
| 描述： | DAUGHTER CARD VIDEO I/O VIODC |
| 标准包装： | 1 |
| 其它名称： | 122-1506 HW-XGI-VIDEO-US-ND |
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Chapter 4
DVI/VGA Input Interface
This chapter describes the DVI and VGA input interface theory of operation. It covers the
signals and presents an overview of the internal operating modes of the AD9887. Users can
refer to the data sheet for more detailed information.
Interface Description
The VIODC DVI/VGA input interface allows standard PC video formats to be captured.
This includes analog VGA formats and digital DVI up to 1600x1200 at 60 Hz.
DVI Connectivity on VIODC
The DVI/VGA input portion of the video input and output daughter card (VIODC) has
two connectors. The first is a traditional HD15 as used by all older analog video cards and
monitors. The second connector is a DVI-I connector which includes pins for both the
analog VGA interface and the DVI digital interface. Note that the analog pins of the two
connectors are tied together, so that only one or the other can be used at any time. See
VIODC uses Analog Devices AD9887A dual interface for flat panel displays. This part
includes two very separate subsections: the analog (VGA) interface and the digital (DVI)
interface. Via the I2C control bus, this part can be configured to receive either of the modes
and output it in a parallel digital form to the FPGA.
4x Differential Pairs (RGB&Clk)
DVI-I
Connector
AD9887A
Dual Interface
Video Data
I2C Control
FPGA
HD15
Analog RGBHV
Connector
ug235_ch3_01_111405
Figure 4-1: DVI Connectivity on VIODC Block Diagram
Signals
The AD9887A interface has a parallel digital bus interface to the FPGA for video data and
an I2C control bus for configuration.
Video Input/Output Daughter Card
UG235 (v1.2.1) October 31, 2007
33
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