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參數(shù)資料
| 型號： | TEA5040S |
| 廠商： | 意法半導體 |
| 英文描述： | WIDE BAND VIDEO PROCESSOR |
| 中文描述： | 寬帶視頻處理器 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大小： | 177K |
| 代理商： | TEA5040S |
Table belowdepicts 9-bit words required for variousfunctions.
Subsystem’s Configuration
Data Bits
LSB....MSB
X00000
X11111
X00000
X11111
XXXXX0
XXXXX1
XXXXX0
XXXXX1
XXXX0X
XXXX1X
XXXXX0
XXXXX1
000000
111111
000000
1111
Add. Bits
LSB....MSB
BRIGHTNESS
Min.
Max.
Min.
max.
Off
On
Allowed
Not Allow.
Sync.
Async.
Ext.
Int.
Min.
Max.
Min.
Max.
000
CONTRAST
100
COLOUR ON/OFF
010
INSERTION
110
SYNC/ASYNC MODE
001
VIDEO INT/EXT
101
SATURATION B-Y
011
SATURATION R-Y
111
A demultiplexer directs the data towards latches
which drive the appropriatecontrol. More detailed
information about serial bus operation is given in
the following chapter.
VideoSwitch
The video switch has three inputs :
- an internalvideo input (pin 39),
- an externalvideo input (pin 37),
- a synchro input (pin 41),
and two outputs :
- an internalvideo output (pin 40),
- a switchablevideo output (pin 42)
The 1Vpp composite video signal applied to the
internal video input is multiplied by two and then
appears as a 2Vpp low impedance composite
video signal at the output. This signal is used to
deliver a 1Vpp/75
compositevideo signal to the
peri-TV plug.
Theswitchablevideooutputcanbeanyofthethree
inputs.When the Int/Extone active bitwordis high
(address number 5), the internal video input is
selected.If not,eitheraregeneratedsynchro pulse
or the externalvideo signal is directed towardsthis
output depending on the level of the Sync/Async
one active bit word (address number 4). As this
outputis to beconnectedto thesynchrointegrated
circuit, RGB information derived from an external
sourceviathePeri-TVplugcanbedisplayedonthe
screen, the synchronization of the TV-set being
then made with an external videosignal.
When RGB information is derived from a source
integrated in the TV-set, a teletext decoder for
example, the synchronization can be made either
on the internal video input(in case of synchronous
data) or on the synchroinput (in case of asynchro-
nous data).
R, G, B Inputs
There are two setsof R, G, B inputs : one is to be
connected to the peri-TV plug (Ext R, G, B), the
secondonetoreceivethe informationderivedfrom
the TV-set itself (Int R, G, B).
In order to have a saturationcontrol on a picture
coming from the R, G, B inputstoo, it is necessary
to getR-Y, B-YandYsignalsfrom R, G, B informa-
tion : this is performed on the first matrix that
receives the three 0.9Vp (100% white) R, G, B
signals and delivers the corresponding Y, R-Y, B-Y
signals. These ones are multiplied by 1.4 in order
to make the R-Y and B-Y signals compatible with
the R-Y and B-Y TV mode inputs. The desired R,
G, B inputs are selected by means of 3 switches
controlled by the two fast blankingsignal inputs. A
high level on FB external pin selects the external
RGB sources. The three selected inputs are
clamped in order to give the required DC level at
the outputofthisfirstmatrix.Thethree notselected
inputs are clamped on a fixedDC level.
Y,R-Y, B-Y Inputs
The 2Vppcompositevideosignal appearingat the
switchable output of the video switch (pin 42) is
driven through the subcarrier trap and the lumi-
nance delay line with a 6 dB attenuationto the Y
input (1Vpp ; pin 12). In order to make this 1Vpp
(synchro to white) Y signal compatible with the
1Vpp (blackto white)Y signal delivered bythe first
matrix, it is necessaryto multiply it by a coefficient
of 1.4.
R, G, B Insertion Pulse (fast blanking)
A R, G, B source has also to provide an insertion
TEA5040S
3/12
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| TEA5101A | RGB HIGH VOLTAGE VIDEO AMPLIFIER |
| TEA5101B | RGB HIGH VOLTAGE VIDEO AMPLIFIER |
| TEA5114A | RGB Switching Circuit(RGB開關電路) |
| TEA5114 | RGB SWITCHING CIRCUIT |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TEA5101A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:RGB HIGH VOLTAGE VIDEO AMPLIFIER |
| TEA5101B | 功能描述:視頻放大器 RGB Amplifier RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| TEA5110 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW DROP-OUT 5V DUAL VOLTAGE REGULATOR |
| TEA5114 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:RGB SWITCHING CIRCUIT |
| TEA5114A | 功能描述:視頻 IC Video Switch RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
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