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LF3311 Arkusz danych(PDF) 9 Page - LOGIC Devices Incorporated |
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LF3311 Arkusz danych(HTML) 9 Page - LOGIC Devices Incorporated |
9 / 24 page DEVICES INCORPORATED LF3311 Horizontal / Vertical Digital Image Filter Improved Performance LOGIC Devices Incorporated 9 9/19/05 LDS.3311-C Video Imaging Products An output limiting function is provided for the output of the vertical filter. The vertical limit registers determine the valid range of output values when limiting is enabled (Bit 0 in Configuration Register 5). There are sixteen 24-bit vertical limit registers. VRSL3-0 determines which vertical limit register is used during the limit operation. A value of 0 on VRSL3-0 selects vertical limit register 0. A value of 1 selects vertical limit register 1 and so on. Each limit register contains both an upper and lower limit value. If the value fed to the limiting circuitry is less than the lower limit, the lower limit value is passed as the filter output. If the value fed to the limiting circuitry is greater than the upper limit, the upper limit value is passed as the filter output. VRSL3-0 may be changed every clock cycle if desired. This allows the limit range to be changed every clock cycle. This is useful when filtering interleaved data. When loading limit values into the device, the upper limit must be greater than the lower limit. Limit register loading is discussed in the LF Interface™ section. Vertical Limiting Functional Description BITS FUNCTION DESCRIPTION 11-0 Line Buffer Length See Line Buffer Description Section Table 4. Configuration Register 2 - Address 202H BITS FUNCTION DESCRIPTION 0 Line Buffer Mode 0 : Delay Mode 1 : Recirculate Mode 1 Line Buffer Load 0 : Normal Load 1 : Parallel Load 11-2 Reserved Must be set to “0” Table 5. Configuration Register 3 - Address 203H Table 3. Configuration Register 1 - Address 201H BITS FUNCTION DESCRIPTION 0 Odd-Tap Interleave Mode 0 : Odd-Tap Interleave Mode Disabled 1 : Odd-Tap Interleave Mode Enabled 4-1 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 Horizontal Tap Number 0 : Even Number of Taps 1 : Odd Number of Taps 6 Horizontal Data Reversal 0 : Data Reversal Enabled 1 : Data Reversal Disabled 11-7 Reserved Must be set to “0” |
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