Datenblatt-Suchmaschine für elektronische Bauteile |
|
LF3320 Datenblatt(PDF) 11 Page - LOGIC Devices Incorporated |
|
LF3320 Datenblatt(HTML) 11 Page - LOGIC Devices Incorporated |
11 / 24 page DEVICES INCORPORATED Video Imaging Products 2-11 LF3320 Horizontal Digital Image Filter 08/16/2000–LDS.3320-N I/D Register Data Path Control The three multiplexers in the I/D Register data path control how data is routed through the forward and reverse data paths. The forward data path contains the I/D Registers in which data flows from left to right in the block diagram in Figure 1. The reverse data path contains the I/D Registers in which data flows from right to left. BITS FUNCTION DESCRIPTION 0 ALU Mode Filter A 0 : A + B 1: B – A 1 Pass A Filter A 0 : ALU Input A = 0 1 : ALU Input A = Forward Register Path 2 Pass B Filter A 0 : ALU Input B = 0 1 : ALU Input B = Reverse Register Path 11-3 Reserved Should be set to “0” TABLE 2. CONFIGURATION REGISTER 0 – ADDRESS 200H BITS FUNCTION DESCRIPTION 0 Filter A Odd-Tap 0 : Odd-Tap Interleave Mode Disabled Interleave Mode 1 : Odd-Tap Interleave Mode Enabled 4-1 Filter A 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 : 1 0 Registers 1010 : 1 1 Registers 1011 : 1 2 Registers 1100 : 1 3 Registers 1101 : 1 4 Registers 1110 : 1 5 Registers 1111 : 1 6 Registers 5 Filter A Tap Number 0 : Even Number of Taps 1 : Odd Number of Taps 6 Filter A Data Reversal 0 : Data Reversal Enabled 1 : Data Reversal Disabled 11-7 Reserved Should be set to “0” TABLE 3. CONFIGURATION REGISTER 1 – ADDRESS 201H In Single or Dual Filter Modes, data is fed from the forward data path to the reverse data path as follows. When the filter is configured for an even number of taps, data from the last I/D Register in the forward data path is fed into the first I/D Register in the reverse data path (see Figure 13). When the filter is configured for an odd number of taps, the data which will appear at the output of the last I/D Register in the forward data path on the next clock cycle is fed into the first I/D Register in the reverse data path. Bit 5 in Configu- ration Register 1 and Configuration Register 3 configures Filters A and B respectively for an even or odd number of taps. When interleaved data is fed through the device and an even tap filter is desired, the filter should be configured for an even number of taps and the I/D Register length should match the numberofdatasetsinterleavedtogether. When interleaved data is fed through the device and an odd tap filter is desired, the filter should be set to Odd-Tap Interleave Mode. Bit 0 of Configuration Register 1 and Configura- tion Register 3 configures Filters A and BrespectivelyforOdd-TapInterleave Mode. When the filter is configured for Odd-TapInterleaveMode,datafromthe next to last I/D Register in the forward data path is fed into the first I/D Register in the reverse data path. When the filter is configured for an odd number of taps (interleaved or non-interleaved modes), the filter is structured such that the center data value is aligned simultaneously at the A and B inputs of the last ALU in the forward data path. In order to achieve the correct result, the user must divide the coefficient by two. Data Reversal Data reversal circuitry is placed after the multiplexers which route data from the forward data path to the reverse data path (see Figure 14). When decimating, the data stream must be reversed in order for data to be properly aligned at the inputs of the ALUs. When data reversal is enabled, the circuitry uses a pair of LIFOs to reverse the order of the data sent to the reverse data path. TXFRA and TXFRB control the LIFOs in Filters A and B respectively. When TXFRA/TXFRB goes LOW, the LIFO sending data to the reverse data path becomes the LIFO receiving data from the forward data path,andtheLIFO receivingdatafrom the forward data path becomes the LIFO sending data to |
Ähnliche Teilenummer - LF3320 |
|
Ähnliche Beschreibung - LF3320 |
|
|
Link URL |
Privatsphäre und Datenschutz |
ALLDATASHEETDE.COM |
War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |