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LF3320QC12 Datenblatt(PDF) 3 Page - LOGIC Devices Incorporated

Teilenummer LF3320QC12
Bauteilbeschribung  Horizontal Digital Image Filter
Download  24 Pages
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Hersteller  LODEV [LOGIC Devices Incorporated]
Direct Link  http://www.logicdevices.com
Logo LODEV - LOGIC Devices Incorporated

LF3320QC12 Datenblatt(HTML) 3 Page - LOGIC Devices Incorporated

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DEVICES INCORPORATED
Video Imaging Products
2-3
LF3320
Horizontal Digital Image Filter
08/16/2000–LDS.3320-N
SIGNAL DEFINITIONS
Power
VCC and GND
+3.3 V power supply. All pins must be
connected.
Clock
CLK — Master Clock
The rising edge of CLK strobes all
enabled registers.
Inputs
DIN11-0 — Data Input
DIN11-0 is the 12-bit data input port to
Filter A. In Dual Filter Mode, DIN11-0
can also be the 12-bit input port to
Filter B. Data is latched on the rising
edge of CLK.
RIN11-0 — Reverse Cascade Input
In Single Filter Mode, RIN11-0 is the 12-
bit reverse cascade input port. This
port is connected to ROUT11-0 of
another LF3320. In Dual Filter Mode,
RIN11-0 can be the 12-bit input port to
Filter B. Data is latched on the rising
edge of CLK.
CFA11-0 — Coefficient A Input
CFA11-0 is used to load data into the
Filter A coefficient banks (banks 0
through 7) and the configuration/
control registers. Data present on
CFA11-0 is latched into the Filter A LF
InterfaceTM on the rising edge of CLK
when LDA is LOW (see the LF
InterfaceTM section for a full discus-
sion).
CAA7-0 — Coefficient Address A
CAA7-0 determines which row of data
in coefficient banks 0 through 7 is fed
to the multipliers. CAA7-0 is latched
into Coefficient Address Register A on
the rising edge of CLK when CENA is
LOW.
CFB11-0 — Coefficient B Input
CFB11-0 is used to load data into the
Filter B coefficient banks (banks 8
through 15) and the configuration/
control registers. Data present on
CFB11-0 is latched into the Filter B LF
InterfaceTM on the rising edge of CLK
when LDB is LOW (see the LF
InterfaceTM section for a full discussion).
CAB7-0 — Coefficient Address B
CAB7-0 determines which row of data in
coefficient banks 8 through 15 is fed to the
multipliers. CAB7-0 is latched into
CoefficientAddressRegisterBonthe
risingedgeofCLKwhenCENBisLOW.
Outputs
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 LF3320. In Dual
Filter Mode, COUT11-0 is a 12-bit
registeredoutputportforthelower
twelve bits of the 16-bit Filter B output.
FIGURE 2.
INPUT FORMATS
11 10 9
2
1
0
–2
11
(Sign)
2
10
2
9
2
2
2
1
2
0
11 10 9
2
1
0
–2
0
(Sign)
2
–1 2–2
2
–9 2–10 2–11
Input Data
Coefficient Data
TABLE 1.
OUTPUT FORMATS
SLCT4-0
S15
S14
S13
· · ·
S8
S7
· · ·
S2
S1
S0
00000
F15
F14
F13
· · ·
F8
F7
· · ·
F2
F1
F0
00001
F16
F15
F14
· · ·
F9
F8
· · ·
F3
F2
F1
00010
F17
F16
F15
· · ·
F10
F9
· · ·
F4
F3
F2
·
·
··
··
··
·
·
·
··
··
··
·
·
·
··
··
··
·
01110
F29
F28
F27
· · ·
F22
F21
· · ·
F16
F15
F14
01111
F30
F29
F28
· · ·
F23
F22
· · ·
F17
F16
F15
10000
F31
F30
F29
· · ·
F24
F23
· · ·
F18
F17
F16
FIGURE 3.
ACCUMULATOR OUTPUT FORMATS
31 30 29
2
1
0
–2
20
(Sign)
2
19 218
2
–9 2–10 2–11
31 30 29
2
1
0
–2
20
(Sign)
2
19 218
2
–9 2–10 2–11
Accumulator A Output
Accumulator B Output


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