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參數(shù)資料
| 型號： | ADV7183AKST |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 顏色信號轉(zhuǎn)換 |
| 英文描述： | Multiformat SDTV Video Decoder |
| 中文描述： | COLOR SIGNAL DECODER, PQFP80 |
| 封裝： | LEAD FREE, MS-026-BEC, LQFP-80 |
| 文件頁數(shù)： | 13/104頁 |
| 文件大?。?/td> | 894K |
| 代理商： | ADV7183AKST |
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ADV7183A
ANALOG FRONT END
ANALOG INPUT MUXING
Rev. A | Page 13 of 104
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ADC_SW_MAN_EN
INSEL[3:0]
ADC0_SW[3:0]
ADC1_SW[3:0]
ADC1_SW[3:0]
INTERNAL
MAPPING
FUNCTIONS
ADC2
ADC1
ADC0
Figure 6. Internal Pin Connections
The ADV7183A has an integrated analog muxing section that
allows more than one source of video signal to be connected to
the decoder. Figure 6 outlines the overall structure of the input
muxing provided in the ADV7183A.
As can be seen in Figure 6, there are two different ways in which
the analog input muxes can be controlled:
1.
Control via functional registers (INSEL).
Using INSEL[3:0] simplifies the setup of the muxes, and
minimizes crosstalk between channels by pre-assigning the
input channels. This is referred to as ADI recommended
input muxing.
2.
Control via an I
2
C manual override
(ADC_sw_man_en, ADC0_sw, ADC1_sw, ADC2_sw).
This is provided for applications with special requirements
(e.g., number/combinations of signals) that would not be
served by the pre-assigned input connections. This is
referred to as manual input muxing.
Please refer to Figure 7 for an overview of the two methods of
controlling the ADV7183A’s input muxing.
ADI Recommended Input Muxing
A maximum of 12 CVBS inputs can be connected and decoded
by the ADV7183A. As can be seen from Figure 5, this means the
sources will have to be connected to adjacent pins on the IC.
This calls for a careful design of the PCB layout (e.g., ground
shielding between all signals routed through tracks that are
physically close together).
INSEL[3:0] Input Selection, Address 0x00, [3:0]
The INSEL bits allow the user to select an input channel as well
as the input format. Depending on the PCB connections, only a
subset of the INSEL modes are valid. Please note that the
INSEL[3:0] does not only switch the analog input muxing, it
also configures the standard definition processor core to
process CVBS (Comp), S-video (Y/C), or component (YPbPr)
format.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADV7183AKST-U1 | 制造商:Analog Devices 功能描述:VID DECODER 80LQFP - Bulk |
| ADV7183AKST-X2 | 制造商:Analog Devices 功能描述:VID DECODER - Bulk |
| ADV7183AXST | 制造商:Analog Devices 功能描述:VIDEO DECODER I.C. - Bulk |
| ADV7183AXST-X2 | 制造商:Analog Devices 功能描述:VIDEO DECODER I.C. - Bulk |
| ADV7183AXT | 制造商:Analog Devices 功能描述:VIDEO DECODER I.C. - Bulk |
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