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LM1270NA データシート(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 LM1270NA
部品情報  Hi-Brite 200 MHz I2C Compatible RGB Image Enhancer with Video Auto Sizing
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

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LM1270
Hi-Brite 200 MHz I
2C Compatible RGB Image Enhancer
with Video Auto Sizing
General Description
The LM1270 is a supplementary IC to the low cost chipset
(LCCS). It modifies the video stream prior to the LCCS
preamplifier. The key function of the LM1270 is image pro-
cessing for enhancing pictures or motion video. Image en-
hancement is accomplished by special intermediate fre-
quency boosting. 200 MHz bandwidth assures minimal
impact on the video change when adding the LM1270.
Other functions of the LM1270 are:
1.
Measures the length of the active video and its front
porch time with respect to the horizontal flyback and
vertical sync for auto alignment information.
2.
Calibration mode for determining the start of the image
coordinates.
3.
Data receiver for receiving data encoded on video.
4.
Window highlight with respect to the horizontal and ver-
tical sync, used with the image enhancing feature.
5.
Video source selection, allowing the choice of two ana-
log inputs.
Features
n
Ideal companion IC to the LCCS to provide image
enhancing for viewing pictures or motion video
n
Programmable clamp generator
n
Programmable blank generator
n
Video detection controlled by I
2C compatible bus,
allowing easy and accurate Hi-Brite window calibration
n
Programmable window Hi-Brite function
n
Programmable image sharpness control (TV emphasis),
adjustable for different line rates
n
Measures video position with respect to the horizontal
flyback and vertical sync pulses, providing necessary
information for auto-sizing
n
Emphasis done either inside or outside the window
Applications
n
Any monitor designed with the LCCS chip set
n
Standard 0.7V video output assures compatibility with
any video pre-amp
Block and Connection Diagram
20063501
FIGURE 1. Order Number LM1270N
See NS Package Number N24D
May 2003
© 2003 National Semiconductor Corporation
DS200635
www.national.com


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