lf3321qc9 LOGIC Devices Incorporated, lf3321qc9 Datasheet - Page 22

• Manufacturer Part Number: lf3321qc9
• Description: Horizontal Digital Image Filter
• Manufacturer: LOGIC Devices Incorporated

DEVICES INCORPORATED
Outputs
Controls
LOGIC Devices Incorporated
Signal Definitions
DOUT15-0 — Data Output
DOUT15-0 is the 16-bit registered data output port for the overall filter (Single Filter Mode) or Filter A
(Dual Filter Mode).
COUT11-0 — Cascade Output
In Single Filter Mode, COUT11-0 is a 12-bit registered cascade output port. COUT11-0 should be
connected to DIN11-0 of another LF3321. In Dual Filter Mode, COUT11-0 is a 12-bit registered output port
for the lower twelve bits of the 16-bit Filter B output.
ROUT11-0 — Reverse Cascade Output
In Single Filter Mode, ROUT11-0 is a 12-bit registered cascade output port. ROUT11-0 on one device
should be connected to RIN11-0 of another LF3321. In Dual Filter Mode, ROUT3-0 is a 4-bit registered
output port for the upper four bits of the 16-bit Filter B output. In this mode, ROUT11-4 is disabled.
LDA — Coefficient A Load
When LDA is LOW, data on CFA11-0 is latched into the Filter A LF Interface
When LDA is HIGH, data is not loaded into the Filter A LF Interface
data input, a HIGH to LOW transition of LDA is required in order for the input circuitry to function properly.
Therefore, LDA must be set HIGH immediately after power up to ensure proper operation of the input
circuitry (see the LF Interface
CENA — Coefficient Address Enable A
When CENA is LOW, data on CAA7-0 is latched into Coefficient Address Register A on the rising edge
of CLK. When CENA is HIGH, data on CAA7-0 is not latched and the register’s contents will not be
changed.
LDB — Coefficient B Load
When LDB is LOW, data on CFB11-0 is latched into the Filter B LF Interface
When LDB is HIGH, data is not loaded into the Filter B LF Interface
data input, a HIGH to LOW transition of LDB is required in order for the input circuitry to function properly.
Therefore, LDB must be set HIGH immediately after power up to ensure proper operation of the input
circuitry (see the LF Interface
Table 20. Output Formats
SLCT4-0
00000
00001
00010
01110
01111
10000
·
·
·
F29
F30
F31
S15
F15
F16
F17
·
·
·
TM
TM
S14
F14
F15
F16
F28
F29
F30
section for a full discussion).
section for a full discussion).
·
·
·
22
S13
F13
F14
F15
F27
F28
F29
·
·
·
· · ·
· · ·
· · ·
· · ·
· · ·
· · ·
· · ·
F10
F22
F23
F24
F8
F9
S8
·
·
·
Horizontal Digital Image Filter
F21
F22
F23
F7
F8
F9
TM
S7
TM
·
·
·
. When enabling the LF Interface
. When enabling the LF Interface
Improved Performance
· · ·
· · ·
· · ·
· · ·
· · ·
· · ·
· · ·
TM
TM
on the rising edge of CLK.
on the rising edge of CLK.
Video Imaging Products
F16
F17
F18
S2
F2
F3
F4
·
·
·
Feb 5, 2003 LDS.3321-A
F15
F16
F17
S1
F1
F2
F3
·
·
·
LF3321
F14
F15
F16
S0
F0
F1
F2
·
·
·
TM
TM
for
for