LF3321 LODEV [LOGIC Devices Incorporated], LF3321 Datasheet - Page 9

• Manufacturer Part Number: LF3321
• Description: Horizontal Digital Image Filter Improved Performance
• Manufacturer: LODEV [LOGIC Devices Incorporated]

DEVICES INCORPORATED
Configuration
and Control
Registers
LOGIC Devices Incorporated
Functional Description
The configuration registers determine how the LF3321 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 Filter A and sixteen for Filter B. Each register is 32 bits wide. RSLA3-0 and
RSLB3-0 determine which Filter A and B round registers respectively are used for rounding.
There are sixteen select registers for Filter A and sixteen for Filter B. Each register is 5 bits wide. RSLA3-0
and RSLB3-0 determine which Filter A and B select registers respectively are used in the select circuitry.
There are sixteen limit registers for Filter A and sixteen for Filter B. Each register is 32-bits wide and
stores both an upper and lower limit value. The lower limit is stored in bits 15-0 and the upper limit is
stored in bits 31-16. RSLA3-0 and RSLB3-0 determine which Filter A and B limit registers respectively
are used for limiting when limiting is enabled. Configuration and control register loading is discussed in
the LF Interface
Table 3. Configuration Register 1 - Address 201H
Table 2. Configuration register 0 - Address 200H
BITS
11-3
BITS
4-1
11-7
0
1
2
0
5
6
TM
section.
FUNCTION
ALU Mode
Pass A
Pass B
Reserved
FUNCTION
Filter B Odd-Tap
Interleave Mode
Filter B I/D Register Length
Filter B Tap Number
Filter B Data Reversal
Reserved
9
DESCRIPTION
0 : A + B
1 : B – A
0 : ALU Input A = 0
1 : ALU Input A = Forward Register Path
0 : ALU Input B = 0
1 : ALU Input B = Reverse Register Path
Must be set to “0”
DESCRIPTION
0 : Odd-Tap Interleave Mode Disabled
1 : Odd-Tap Interleave Mode Enabled
0000 :
0001 :
0010 :
0011 :
0100 :
0101 :
0110 :
0111 :
1000 :
1001 :
1010 :
1011 :
1100 :
1101 :
1110 :
1111 :
0 : Even Number of Taps
1 : Odd Number of Taps
0 : Data Reversal Enabled
1 : Data Reversal Disabled
Must be set to “0”
Horizontal Digital Image Filter
1 Register
2 Registers
3 Registers
4 Registers
5 Registers
6 Registers
7 Registers
8 Registers
9 Registers
10 Registers
11 Registers
12 Registers
13 Registers
14 Registers
15 Registers
16 Registers
Improved Performance
Video Imaging Products
Feb 5, 2003 LDS.3321-A
LF3321