Moteur de recherche de fiches techniques de composants électroniques |
|
LF3321 Fiches technique(PDF) 7 Page - LOGIC Devices Incorporated |
|
LF3321 Fiches technique(HTML) 7 Page - LOGIC Devices Incorporated |
7 / 28 page DEVICES INCORPORATED LF3321 Horizontal Digital Image Filter Improved Performance LOGIC Devices Incorporated 7 Feb 5, 2003 LDS.3321-A Video Imaging Products Three cascade ports are provided to allow cascading of multiple devices for more filter taps (see Figure 8). COUT11-0 of one device should be connected to DIN11-0 of another device. ROUT11-0 of one device should be connected to RIN11-0 of another device. As many LF3321s as desired may be cascaded together. However, the outputs of the LF3321s must be added together with external adders. Bit 0 of Configuration Register 5 determines how the device will send data to the reverse data path when multiple LF3321s are cascaded together. If a LF3321 is the last in the cascade chain, Bit 0 of Configuration Register 5 should be set to a “0”. This will cause the data from the end of the forward data path to be routed to the beginning of the reverse data path based on how the filter is configured (even/odd number of taps or interleave mode). If a LF3321 is not the last in the cascade chain, Bit 0 of Configuration Register 5 should be set to a “1”. This will cause RIN11-0 to feed data to the reverse data path. When not cascading, Bit 0 of Configuration Register 5 should be set to a “0”. Special data routing circuitry is used to feed the COUT and ROUT output registers. The data routing circuitry is required to correctly align data in the forward and reverse data paths as data passes from one LF3321 to another. The COUT and ROUT registers are loaded with data which is two clock cycles behind the current output of the I/D Register just before the ROUT or COUT register. This correctly accounts for the extra delays added to the forward and reverse data paths by the input/output cascade registers. The Output Adder adds the Filter A and B outputs together when the device is in Single Filter Mode. If 24-bit data and 12-bit coefficients or 12-bit data and 24-bit coefficients are desired, the LF3321 can facilitate this by scaling the Filter B output by 2-12 before adding it to the Filter A output. Bit 3 in Configuration Register 5 determines if the Filter B output is scaled before being added to the Filter A output. Functional Description Cascading DIN I/D REGISTERS I/D REGISTERS FILTER A FILTER B RSL CIRCUIT RIN COUT ROUT DIN I/D REGISTERS I/D REGISTERS FILTER A FILTER B RSL CIRCUIT COUT I/D REGISTERS I/D REGISTERS FILTER A FILTER B RSL CIRCUIT COUT I/D REGISTERS I/D REGISTERS FILTER A FILTER B RSL CIRCUIT LF3320 RIN ROUT DIN DIN ROUT RIN LF3320 LF3320 LF3320 LF3347 12 16 16 16 16 RSL CIRCUIT DATA OUT 128 TAP RESULT 16 25 25 Figure 8. Multiple LF3321 Cascaded Together Output Adder |
Numéro de pièce similaire - LF3321 |
|
Description similaire - LF3321 |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants 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 |