LF3311 Datasheet, PDF (17/24 Pages) LOGIC Devices Incorporated – Horizontal / Vertical Digital Image Filter

DEVICES INCORPORATED
LF3311
Horizontal / Vertical Digital Image Filter
Improved Performance
Power
Clock
Inputs
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.
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 clock.
HCF11-0 — Horizontal Coefficient Input
HCF11-0 is used to load data into the horizontal coefficient banks and the Configuration/Control Registers.
Data present on HCF11-0 is latched into the Horizontal LF Interface^TM on the rising edge of CLK when HLD
is LOW (see the LF Interface^TM section for a full discussion).
HCA7-0 — Horizontal Coefficient Address
HCA7-0 determines which row of data in the horizontal coefficient banks is fed to the multipliers in the
horizontal filter. HCA7-0 is latched into the Horizontal Coefficient Address Register on the rising edge of
CLK when HCEN is LOW.
VCF11-0 — Vertical Coefficient Input
VCF11-0 is used to load data into the vertical coefficient banks and the Configuration/Control Registers.
Data present on VCF11-0 is latched into the Vertical LF Interface^TM on the rising edge of CLK when VLD is
LOW (see the LF Interface^TM section for a full discussion).
VCA7-0 — Vertical Coefficient Address
VCA7-0 determines which row of data in the vertical coefficient banks is fed to the multipliers in the vertical
filter. VCA7-0 is latched into the Vertical Coefficient Address Register on the rising edge of CLK when
VCEN is LOW.
Figure 16. 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
Figure 17. Accumulator Output Formats
Accumulator Output
31 30 29
2²⁰ 2¹⁹ 2¹⁸
(Sign)
210
2 ⁹ 2 ¹⁰ 2 ¹¹
LOGIC Devices Incorporated
Video Imaging Products
17
9/19/05 LDS.3311-C