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LF3320QC15 Datasheet(PDF) 1 Page - LOGIC Devices Incorporated

Part # LF3320QC15
Description  Horizontal Digital Image Filter
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Manufacturer  LODEV [LOGIC Devices Incorporated]
Direct Link  http://www.logicdevices.com
Logo LODEV - LOGIC Devices Incorporated

LF3320QC15 Datasheet(HTML) 1 Page - LOGIC Devices Incorporated

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DEVICES INCORPORATED
Video Imaging Products
2-1
LF3320
Horizontal Digital Image Filter
08/16/2000–LDS.3320-N
FEATURES
DESCRIPTION
The LF3320 filters digital images in the
horizontal 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 LF3320 is designed to take
advantage of symmetric coefficient
sets. When symmetric coefficient sets
are used, the device can be configured
as a single 32-tap FIR filter or as two
separate 16-tap FIR filters.
When asymmetric coefficient sets are
used, the device can be configured as a
single 16-tap FIR filter or as two
separate 8-tap FIR filters. Multiple
LF3320s can be cascaded to create
larger filters.
Interleave/Decimation Registers (I/D
Registers) allow interleaved data to be
fed directly into the device and filtered
without separating the data into
individual data streams.
The LF3320 can handle a maximum of
sixteen data sets interleaved together.
The I/D Registers and on-chip accu-
mulators facilitate using decimation to
increase the number of filter taps.
Decimation of up to 16:1 is supported.
The LF3320 contains enough on-board
memory to store 256 coefficient sets.
Two separate LF InterfacesTM allow all
256 coefficient sets to be updated within
vertical blanking.
LF3320
Horizontal Digital Image Filter
DEVICES INCORPORATED
LF3320 BLOCK DIAGRAM
❑ 83 MHz Data Rate
❑ 12-bit Data or Coefficients (Expand-
able to 24-bit)
❑ 32-Tap FIR Filter, Cascadable for
More Filter Taps
❑ Over 49 K-bits of on-board Memory
❑ LF InterfaceTM Allows All 256
Coefficient Sets to be Updated
Within Vertical Blanking
❑ Various Operating Modes: Dual
Filter, Single Filter, Double Wide
Data or Coefficient, Matrix Multipli-
cation, and Accumulator Access.
❑ Selectable 16-bit Data Output with
User-DefinedRoundingandLimiting
❑ Supports Interleaved Data Streams
❑ Supports Decimation up to 16:1 for
Increasing Number of Filter Taps
❑ 3.3 Volt Supply
❑ 144 Lead PQFP
256
COEFFICIENT
SET
STORAGE
16-TAP
FILTER A
16-TAP
FILTER B
DIN11-0
12
256
COEFFICIENT
SET
STORAGE
ROUT11-0
12
12
12
ROUND
SELECT
LIMIT
CIRCUITRY
OED
CAA7-0
CENA
8
CAB7-0
CENB
8
COUT11-0
RIN11-0
DOUT15-0
CFA11-0
12
LDA
CFB11-0
LDB
16
INTERLEAVE / DECIMATION
REGISTERS
12
CLK
PAUSEA
PAUSEB


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