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LF2247QC15 Arkusz danych(PDF) 1 Page - LOGIC Devices Incorporated

Numer części LF2247QC15
Szczegółowy opis  Image Filter with Coefficient RAM
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Producent  LODEV [LOGIC Devices Incorporated]
Strona internetowa  http://www.logicdevices.com
Logo LODEV - LOGIC Devices Incorporated

LF2247QC15 Arkusz danych(HTML) 1 Page - LOGIC Devices Incorporated

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DEVICES INCORPORATED
Video Imaging Products
1
LF2247
Image Filter with Coefficient RAM
1
2
3
4
5
6
7
8
9
10
11
08/16/2000–LDS.2247-H
u
u
u
u
u 66 MHz Data Input and Compu-
tation Rate
u
u
u
u
u Four 11 x 10-bit Multipliers with
Individual Data and Coefficient
Inputs and a 25-bit Accumulator
u
u
u
u
u Four 32 x 11-bit Serially Loadable
Coefficient Registers
u
u
u
u
u Fractional or Integer Two’s
Complement Operands
u
u
u
u
u Package Styles Available:
• 84-pin PLCC, J-Lead
• 100-pin PQFP
FEATURES
DESCRIPTION
LF2247
Image Filter with Coefficient RAM
DEVICES INCORPORATED
The LF2247 consists of an array of four
11 x 10-bit registered multipliers
followed by a summer and a 25-bit
accumulator. The LF2247 provides a
coefficient register file containing four
32 x 11-bit registers which are capable
of storing 32 different sets of filter
coefficients for the multiplier array.
All multiplier data inputs are user
accessible and can be updated every
clock cycle with either fractional or
integer two’s complement data. The
pipelined architecture has fully
registered input and output ports and
an asynchronous three-state output
enable control to simplify the design
of complex systems. The pipeline
latency for all inputs is five clock
cycles.
A 25-bit accumulator path allows
cumulative word growth which may
be internally rounded to 16 bits.
Output data is updated every clock
cycle and may be held under user
control. The data inputs/outputs and
control inputs are registered on the
rising edge of CLK. The Serial Data In
signal, SDIN, is registered on the
LF2247 BLOCK DIAGRAM
D19-0
10
11
ENB1
D29-0
10
11
ENB2
22
D39-0
10
11
ENB3
D49-0
10
11
ENB4
22
MS
LS
S15-0
ACC
FSEL
OEN
CLK
TO ALL REGISTERS
(EXCEPT COEFFICIENT REGISTERS)
25
OCEN
Coefficient
Register 1
(32 x 11-bit)
Coefficient
Register 2
(32 x 11-bit)
Coefficient
Register 3
(32 x 11-bit)
Coefficient
Register 4
(32 x 11-bit)
A4-0
SEN
SDIN
SCLK
SCLK
5
ENBA
16
COEFFICIENT REGISTER FILE
SEN
SCLK
SEN
SCLK
SEN


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