LF3321

LF3321 Horizontal Digital Image Filter www.DataSheet4U.com DEVICES INCORPORATED Improved Performance FEATURES 111 MHz Data Rate 12-bit Data or Coefficients (Expandable to 24-bit) 32-Tap FIR Filter, Cascadable for More Filter Taps LF Interface™ Allows All 256 Coefficient Sets to be Updated Within Vertical Blanking Over 49 K-bits of on-board Memory Various Operating Modes: Dual Filter, Single Filter, Double Wide Data or Coefficient, Matrix Multiplication, and Accumulator Access. Selectable 16-bit Data Output with User-Defined Rounding and Limiting Supports Interleaved Data Streams Supports Decimation up to 16:1 for Increasing Number of Filter Taps 3.3 Volt Power Supply 144 Lead PQFP DESCRIPTION The LF3321 is an improved version of the LF3320 Horizontal Digital Image Filter capable of operating at speeds of up to 111MHz. This improved speed increases flexibility and performance and enables the user to utilize this device in more applications. For example, four interleaved data streams of 27MHz can now be processed within one device. The part is functionally identical to the LF3320 with the exception that the filter data path is specified to operate faster than the LF Control Interface. When operating the filter at speeds in excess of 90MHz, loading of coefficients via the LF Interface must be throttled to a maximum of 90MHz by asserting the PAUSE pin as required to allow sufficient setup time for the configuration data provided to the chip via the LF Interface. Figure 1. Swi...