lf3311 LOGIC Devices Incorporated, lf3311 Datasheet - Page 18

• Manufacturer Part Number: lf3311
• Description: Horizontal / Vertical Digital Image Filter
• Manufacturer: LOGIC Devices Incorporated

DEVICES INCORPORATED
Outputs
Controls
LOGIC Devices Incorporated
Signal Definitions
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
CLK. When HLD is HIGH, data can not be latched into the Horizontal LF Interface
LF Interface
function properly. Therefore, HLD must be set HIGH immediately after power up to ensure proper operation
of the input circuitry (see the LF Interface
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
CLK. When VLD is HIGH, data can not be latched into the Vertical LF Interface
Interface
function properly. Therefore, VLD must be set HIGH immediately after power up to ensure proper operation
of the input circuitry (see the LF Interface
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.
Table 20. Output Formats
SLCT4-0
00000
00001
00010
01110
01111
10000
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TM
for data input, a HIGH to LOW transition of VLD is required in order for the input circuitry to
TM
for data input, a HIGH to LOW transition of HLD is required in order for the input circuitry to
F29
F30
F31
S15
F15
F16
F17
·
·
·
S14
F14
F15
F16
F28
F29
F30
·
·
·
18
S13
F13
F14
F15
F27
F28
F29
TM
TM
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·
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section for a full discussion).
section for a full discussion).
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Horizontal / Vertical Digital Image Filter
F10
F22
F23
F24
F8
F9
S8
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·
·
F21
F22
F23
F7
F8
F9
S7
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Improved Performance
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TM
on the rising edge of
TM
Video Imaging Products
TM
. When enabling the LF
on the rising edge of
TM
F16
F17
F18
. When enabling the
S2
F2
F3
F4
·
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·
F15
F16
F17
S1
F1
F2
F3
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9/19/05 LDS.3311-C
LF3311
F14
F15
F16
S0
F0
F1
F2
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