LF3310QC15 LODEV [LOGIC Devices Incorporated], LF3310QC15 Datasheet - Page 12

• Manufacturer Part Number: LF3310QC15
• Description: Horizontal / Vertical Digital Image Filter
• Manufacturer: LODEV [LOGIC Devices Incorporated]

DEVICES INCORPORATED
Coefficient Banks
The coefficient banks store the
coefficients which feed into the
multipliers in the horizontal and
vertical filters. There is a separate
bank for each multiplier. Each bank
can hold 256 12-bit coefficients. The
banks are loaded using an LF
Interface
Interface
vertical banks. Coefficient bank
loading is discussed in the LF
Interface
Configuration and Control Registers
The Configuration Registers deter-
mine how the HV Filter operates.
Tables 2 through 7 show the formats
of the six configuration registers.
There are three types of control
registers: round, select, and limit.
There are sixteen round registers for
F
F
IGURE
IGURE
HCF/VCF
HCF/VCF
HLD/VLD
HLD/VLD
TM
TM
TM
12. C
13. C
CLK
11-0
CLK
. There is a separate LF
section.
11-0
for the horizontal and
W1: Configuration Register loaded with new data on this rising clock edge.
W2: Select Register loaded with new data on this rising clock edge.
W3: Round Register loaded with new data on this rising clock edge.
W4: Limit Register loaded with new data on this rising clock edge.
W1: Coefficient Set 1 written to coefficient banks during this clock cycle.
W2: Coefficient Set 2 written to coefficient banks during this clock cycle.
W3: Coefficient Set 3 written to coefficient banks during this clock cycle.
OEFFICIENT
ONFIGURATION
ADDR
ADDR
CONFIG REG
1
1
COEFFICIENT SET 1
DATA
B
COEF
ANK
/C
1
0
ONTROL
W1
ADDR
L
SELECT REG
OADING
2
the horizontal filter and sixteen for the
vertical filter. Each register is 32-bits
wide. HRSL
which horizontal and vertical round
registers respectively are used for
rounding.
There are sixteen select registers for
the horizontal filter and sixteen for
the vertical filter. Each register is
5-bits wide. HRSL
determine which horizontal and
vertical select registers respectively
are used in the select circuitry.
There are sixteen limit registers for
the horizontal filter and sixteen for
the vertical filter. Each register is
24-bits wide and stores both an upper
and lower limit value. The lower
limit is stored in bits 11-0 and the
upper limit is stored in bits 23-12.
HRSL
which horizontal and vertical limit
registers respectively are used for
DATA
COEF
R
EGISTER
S
3-0
1
7
EQUENCE
W2
ADDR
and VRSL
ADDR
3-0
W1
3
2
L
COEFFICIENT SET 2
and VRSL
DATA
OADING
COEF
ROUND REGISTER
12
3-0
3-0
1
0
Horizontal / Vertical Digital Image Filter
and VRSL
DATA
determine
S
3-0
EQUENCE
2
determine
DATA
COEF
3-0
3
7
DATA
ADDR
W2
4
3
limiting when limiting is enabled.
Configuration and Control Register
loading is discussed in the LF
Interface
LF Interface
The Horizontal and Vertical
LF Interfaces
into the horizontal and vertical
coefficient banks respectively. They
are also used to load data into the
Configuration and Control Registers.
The following section describes how
the Horizontal LF Interface
The Horizontal and Vertical
LF Interfaces
function. If HLD and HCF
replaced with VLD and VCF
following section will describe how
the Vertical LF Interface
HLD is used to enable and disable the
Horizontal LF Interface
COEFFICIENT SET 3
W3
ADDR
COEF
Video Imaging Products
LIMIT REGISTER
4
0
DATA
TM
section.
1
TM
TM
TM
DATA
are used to load data
are identical in
COEF
2
7
W4
TM
11/08/2001-LDS.3310-H
TM
W3
. When
works.
11-0
TM
LF3310
11-0
works.
are
, the