LF3320 查看數據表（PDF） - LOGIC Devices Incorporated
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LF3320 Datasheet PDF : 24 Pages
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DEVICES INCORPORATED
LF3320
Horizontal Digital Image Filter
SIGNAL DEFINITIONS
Power
VCC and GND
+3.3 V power supply. All pins must be
connected.
FIGURE 2. INPUT FORMATS
Input Data
11 10 9
–211 210 29
(Sign)
210
22 21 20
Coefficient Data
11 10 9
–20 2–1 2–2
(Sign)
210
2–9 2–10 2–11
Clock
CLK — Master Clock
The rising edge of CLK strobes all
enabled registers.
FIGURE 3. ACCUMULATOR OUTPUT FORMATS
Accumulator A Output
Accumulator B Output
Inputs
DIN11-0 — Data Input
31 30 29
–220 219 218
(Sign)
210
2–9 2–10 2–11
31 30 29
–220 219 218
(Sign)
210
2–9 2–10 2–11
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
TABLE 1. OUTPUT FORMATS
SLCT4-0 S15 S14 S13
···
00000
F15 F14 F13
···
00001
F16 F15 F14
···
00010
F17 F16 F15
···
·
···
·
···
·
···
01110
F29 F28 F27
···
01111
F30 F29 F28
···
10000
F31 F30 F29
···
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).
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.
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
Coefficient Address Register B on the
rising edge of CLK when CENB is LOW.
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
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
registered output port for the lower
twelve bits of the 16-bit Filter B output.
Video Imaging Products
2-3
08/16/2000–LDS.3320-N
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