lf3321qc9 LOGIC Devices Incorporated, lf3321qc9 Datasheet - Page 21

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

DEVICES INCORPORATED
Clock
Inputs
LOGIC Devices Incorporated
Power
Signal Definitions
Vcc and GND
+3.3 V power supply. All pins must be connected.
CLK — Master Clock
The rising edge of CLK strobes all enabled registers.
DIN
DIN
to Filter B. Data is latched on the rising edge of clock.
RIN
In Single Filter Mode, RIN11-0 is the 12-bit reverse cascade input port. This port is connected to ROUT11-0
of another LF3321. 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 discussion).
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 Coefficient Address Register B on the rising edge of CLK when CENB is LOW.
11-0
11-0
11-0
Figure 23. Input Formats
Figure 24. Accumulator Output Formats
— Data Input
is the 12-bit data input port to Filter A. In Dual Filter Mode, DIN
— Reverse Cascade Input
(Sign)
(Sign)
–2
–2
11 10 9
31 30 29
Accumulator A Output
11
20
2
2
10
19
Input Data
2
2
18
9
2
2
2
2
–9
2
2
2
21
1
1
–10
1
2
2
0
0
–11
0
(Sign)
(Sign)
–2
–2
11 10 9
31 30 29
Accumulator B Output
20
0
Horizontal Digital Image Filter
2
2
Coefficient Data
–1
19
2
2
–2
11-0
18
Improved Performance
can also be the 12-bit input port
2
2
Video Imaging Products
2
2
–9
–9
2
2
1
–10
1
–10
2
2
0
–11
0
–11
Feb 5, 2003 LDS.3321-A
LF3321