LF3311 Datasheet, PDF (18/24 Pages) LOGIC Devices Incorporated – Horizontal / Vertical Digital Image Filter

DEVICES INCORPORATED
LF3311
Horizontal / Vertical Digital Image Filter
Improved Performance
Outputs
Controls
Signal Definitions
Table 20. Output Formats
SLCT4-0
00000
00001
00010
·
·
·
01110
01111
10000
S15 S14 S13
F15
F14
F13
F16
F15
F14
F17
F16
F15
·
·
·
·
·
·
·
·
·
F29
F28
F27
F30
F29
F28
F31
F30
F29
· · · S8 S7
· · · F8
F7
· · · F9
F8
· · · F10 F9
·
·
·
·
·
·
· · · F22 F21
· · · F23 F22
· · · F24 F23
· · · S2 S1 S0
···
F2
F1
F0
···
F3
F2
F1
···
F4
F3
F2
·
·
·
·
·
·
·
·
·
· · · F16 F15 F14
· · · F17 F16 F15
· · · F18 F17 F16
DOUT11-0 — Data Output
DOUT11-0 is the 12-bit registered data output port.
HLD — Horizontal Coefficient Load
When HLD is LOW, data on HCF11-0 is latched into the Horizontal LF Interface^TM on the rising edge of
CLK. When HLD is HIGH, data can not be latched into the Horizontal LF Interface^TM. When enabling the
LF Interface^TM for data input, a HIGH to LOW transition of HLD is required in order for the input circuitry to
function properly. Therefore, HLD must be set HIGH immediately after power up to ensure proper operation
of the input circuitry (see the LF Interface^TM section for a full discussion).
HCEN — Horizontal Coefficient Address Enable
When HCEN is LOW, data on HCA7-0 is latched into the Horizontal Coefficient Address Register on the
rising edge of CLK. When HCEN is HIGH, data on HCA7-0 is not latched and the register’s contents
will not be changed.
VLD — Vertical Coefficient Load
When VLD is LOW, data on VCF11-0 is latched into the Vertical LF Interface^TM on the rising edge of
CLK. When VLD is HIGH, data can not be latched into the Vertical LF Interface^TM. When enabling the LF
Interface^TM for data input, a HIGH to LOW transition of VLD is required in order for the input circuitry to
function properly. Therefore, VLD must be set HIGH immediately after power up to ensure proper operation
of the input circuitry (see the LF Interface^TM section for a full discussion).
VCEN — Vertical Coefficient Address Enable
When VCEN is LOW, data on VCA7-0 is latched into the Vertical Coefficient Address Register on the
rising edge of CLK. When VCEN is HIGH, data on VCA7-0 is not latched and the register’s contents
will not be changed.
TXFR — Horizontal Filter LIFO Transfer Control
TXFR is used to change which LIFO in the data reversal circuitry sends data to the reverse data path and
which LIFO receives data from the forward data path. When TXFR goes LOW, the LIFO sending data to the
reverse data path becomes the LIFO receiving data from the forward data path, and the LIFO receiving data
from the forward data path becomes the LIFO sending data to the reverse data path. The device must see a
HIGH to LOW transition of TXFR in order to switch LIFOs.
LOGIC Devices Incorporated
Video Imaging Products
18
9/19/05 LDS.3311-C