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LF3330QC12 Datasheet(PDF) 1 Page - LOGIC Devices Incorporated |
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LF3330QC12 Datasheet(HTML) 1 Page - LOGIC Devices Incorporated |
1 / 15 page DEVICES INCORPORATED Video Imaging Products 1 LF3330 Vertical Digital Image Filter 11/08/2001–LDS.3330-M u u u u u 83 MHz Data Rate u u u u u 12-bit Data and Coefficients u u u u u On-board Memory for 256 Coefficient Sets u u u u u LF InterfaceTM Allows All 256 Coefficient Sets to be Updated Within Vertical Blanking u u u u u Selectable 16-bit Data Output with User-Defined Rounding and Limiting u u u u u Seven 3K x 12-bit, Programmable Two-Mode Line Buffers u u u u u Separate Input Port for Odd and Even Field Filtering u u u u u 8 Filter Taps u u u u u Cascadable for More Filter Taps u u u u u Supports Interleaved Data Streams u u u u u 3.3 Volt Power Supply u u u u u 5 Volt Tolerant I/O u u u 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 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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