LF3330QC15 datasheet(1/15 Pages) LODEV

Il numero della parte	LF3330QC15

Spiegazioni elettronici	Vertical Digital Image Filter

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Produttore elettronici	LODEV [LOGIC Devices Incorporated]

Homepage	http://www.logicdevices.com

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DEVICES INCORPORATED

Video Imaging Products

1

LF3330

Vertical Digital Image Filter

11/08/2001–LDS.3330-M

u

u 83 MHz Data Rate

u

u 12-bit Data and Coefficients

u

u On-board Memory for 256

Coefficient Sets

u

u LF InterfaceTM Allows All 256

Coefficient Sets to be Updated

Within Vertical Blanking

u

u Selectable 16-bit Data Output with

User-Defined Rounding and

Limiting

u

u Seven 3K x 12-bit, Programmable

Two-Mode Line Buffers

u

u Separate Input Port for Odd and

Even Field Filtering

u

u 8 Filter Taps

u

u Cascadable for More Filter Taps

u

u Supports Interleaved Data Streams

u

u 3.3 Volt Power Supply

u

u 5 Volt Tolerant I/O

u

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

ROUND

SELECT

LIMIT

CIRCUITRY

OED

16

DOUT15-0

12

COUT11-0

32

VB11-0

12

OEC

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