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LF3330 Datasheet(PDF) 1 Page - LOGIC Devices Incorporated

Part No. LF3330
Description  Vertical Digital Image Filter
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Maker  LODEV [LOGIC Devices Incorporated]
Homepage  http://www.logicdevices.com
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LF3330 Datasheet(HTML) 1 Page - LOGIC Devices Incorporated

 
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DEVICES INCORPORATED
Video Imaging Products
1
LF3330
Vertical Digital Image Filter
11/08/2001–LDS.3330-M
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u 83 MHz Data Rate
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u 12-bit Data and Coefficients
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u On-board Memory for 256
Coefficient Sets
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u LF InterfaceTM Allows All 256
Coefficient Sets to be Updated
Within Vertical Blanking
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u Selectable 16-bit Data Output with
User-Defined Rounding and
Limiting
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u Seven 3K x 12-bit, Programmable
Two-Mode Line Buffers
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u Separate Input Port for Odd and
Even Field Filtering
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u 8 Filter Taps
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u Cascadable for More Filter Taps
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u Supports Interleaved Data Streams
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u 3.3 Volt Power Supply
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u 5 Volt Tolerant I/O
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u 100 Lead PQFP
FEATURES
DESCRIPTION
The LF3330 filters digital images in
the vertical dimension at real-time
video rates. The input and coefficient
data are both 12 bits and in two’s
complement format. The output is
also in two’s complement format and
may be rounded to 16 bits.
The filter is an 8-tap FIR filter with all
required line buffers contained on-
chip. The line buffers can store video
lines with lengths from 4 to 3076
pixels.
Multiple LF3330s can be cascaded
together to create larger vertical
filters.
Due to the length of the line buffers,
interleaved data can be fed directly
into the device and filtered without
separating the data into individual
data streams. The number of inter-
leaved data sets that the device can
handle is limited only by the length of
the on-chip line buffers. If the inter-
leaved video line has 3076 data values
or less, the filter can handle it.
The LF3330 contains enough on-board
memory to store 256 coefficient sets.
The LF InterfaceTM allows all 256
coefficient sets to be updated within
vertical blanking.
Selectable 16-bit data output with
user-defined rounding and limiting
minimizes the constraints put on
coefficient sets for various filter
implementations.
LF3330 BLOCK DIAGRAM
LF3330
Vertical Digital Image Filter
DEVICES INCORPORATED
DIN11-0
3K LINE BUFFER
12
3K LINE BUFFER
3K LINE BUFFER
3K LINE BUFFER
3K LINE BUFFER
3K LINE BUFFER
3K LINE BUFFER
ROUND
SELECT
LIMIT
CIRCUITRY
OED
16
DOUT15-0
12
COUT11-0
32
VB11-0
12
OEC


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