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LF3321 Scheda tecnica(PDF) 9 Page - LOGIC Devices Incorporated |
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LF3321 Scheda tecnica(HTML) 9 Page - LOGIC Devices Incorporated |
9 / 28 page DEVICES INCORPORATED LF3321 Horizontal Digital Image Filter Improved Performance LOGIC Devices Incorporated 9 Feb 5, 2003 LDS.3321-A Video Imaging Products The configuration registers determine how the LF3321 operates. Tables 2 through 7 show the formats of the six configuration registers. There are three types of control registers: round, select, and limit. There are sixteen round registers for Filter A and sixteen for Filter B. Each register is 32 bits wide. RSLA3-0 and RSLB3-0 determine which Filter A and B round registers respectively are used for rounding. There are sixteen select registers for Filter A and sixteen for Filter B. Each register is 5 bits wide. RSLA3-0 and RSLB3-0 determine which Filter A and B select registers respectively are used in the select circuitry. There are sixteen limit registers for Filter A and sixteen for Filter B. Each register is 32-bits wide and stores both an upper and lower limit value. The lower limit is stored in bits 15-0 and the upper limit is stored in bits 31-16. RSLA3-0 and RSLB3-0 determine which Filter A and B limit registers respectively are used for limiting when limiting is enabled. Configuration and control register loading is discussed in the LF InterfaceTM section. Functional Description BITS FUNCTION DESCRIPTION 0 Filter B Odd-Tap 0 : Odd-Tap Interleave Mode Disabled Interleave Mode 1 : Odd-Tap Interleave Mode Enabled 4-1 Filter B I/D Register Length 0000 : 1 Register 0001 : 2 Registers 0010 : 3 Registers 0011 : 4 Registers 0100 : 5 Registers 0101 : 6 Registers 0110 : 7 Registers 0111 : 8 Registers 1000 : 9 Registers 1001 : 10 Registers 1010 : 11 Registers 1011 : 12 Registers 1100 : 13 Registers 1101 : 14 Registers 1110 : 15 Registers 1111 : 16 Registers 5 Filter B Tap Number 0 : Even Number of Taps 1 : Odd Number of Taps 6 Filter B Data Reversal 0 : Data Reversal Enabled 1 : Data Reversal Disabled 11-7 Reserved Must be set to “0” Table 3. Configuration Register 1 - Address 201H BITS FUNCTION DESCRIPTION 0 ALU Mode 0 : A + B 1 : B – A 1 Pass A 0 : ALU Input A = 0 1 : ALU Input A = Forward Register Path 2 Pass B 0 : ALU Input B = 0 1 : ALU Input B = Reverse Register Path 11-3 Reserved Must be set to “0” Table 2. Configuration register 0 - Address 200H Configuration and Control Registers |
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