LF3347QC15 LODEV [LOGIC Devices Incorporated], LF3347QC15 Datasheet

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LF3347QC15

Manufacturer Part Number
LF3347QC15
Description
High-Speed Image Filter with Coefficient RAM
Manufacturer
LODEV [LOGIC Devices Incorporated]
Datasheet
DEVICES INCORPORATED
FEATURES
LF3347 B
DEVICES INCORPORATED
120-pin PQFP
83 MHz Data Input and Compu-
tation Rate
Four 12 x 12-bit Multipliers with
Individual Data and Coefficient
Inputs
Four 256 x 12-bit Coefficient Banks
32-bit Accumulator
Selectable 16-bit Data Output with
User-Defined Rounding and Limiting
Two’s Complement Operands
3.3 Volt Power Supply
5 Volt Tolerant I/O
SHIFT
LOCK
CCCLK
CC
ENBA
ACC
CLK
A
11-0
OE
LD
7-0
4-0
12
8
12
D
D1
2
11-0
IAGRAM
INTERFACE
ENB
LF
5
1
(256 x 12-bit)
TO ALL REGISTERS
Coefficient
12
Bank 1
3
5
High-Speed Image Filter with Coefficient RAM
25
The LF3347 consists of an array of
four 12 x 12-bit registered multipliers
followed by two summers and a
32-bit accumulator. The LF3347
provides four 256 x 12-bit coefficient
banks which are capable of storing
256 different sets of filter coefficients
for the multiplier array. All multi-
plier data inputs are user accessible
and can be updated every clock cycle
with 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.
DESCRIPTION
12
D2
2
11-0
ENB
2
High-Speed Image Filter with Coefficient RAM
(256 x 12-bit)
Coefficient
12
Bank 2
5
Rounding
Selecting
16
16
Limiting
Circuit
S
1
15-0
12
D3
32
2
11-0
ENB
3
(256 x 12-bit)
Coefficient
12
Rounding/
Registers
Bank 3
Limiting
NOTE: NUMBERS IN REGISTERS INDICATE
25
A 32-bit accumulator allows cumula-
tive 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 Control/Coeffi-
cient Data Input, CC
on the rising edge of CCCLK.
The LF3347 is ideal for performing
pixel interpolation in image manipu-
lation and filtering applications. The
LF3347 can perform a bilinear inter-
polation of an image (4-pixel kernels)
at real-time video rates when used
SELRND
NUMBER OF PIPELINE DELAYS
OCEN
4
4
4
Video Imaging Products
12
3-0
D4
2
11-0
SELLMT
4
4
ENB
6
3-0
4
(256 x 12-bit)
Coefficient
12
Bank 4
LF3347
LMTEN
6
11-0
08/16/2000–LDS.3347-G
, is registered
LF3347

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LF3347QC15 Summary of contents

Page 1

DEVICES INCORPORATED High-Speed Image Filter with Coefficient RAM DEVICES INCORPORATED FEATURES 83 MHz Data Input and Compu- tation Rate Four 12 x 12-bit Multipliers with Individual Data and Coefficient Inputs Four 256 x 12-bit Coefficient Banks 32-bit Accumulator Selectable 16-bit ...

Page 2

DEVICES INCORPORATED with an image resampling se- quencer. Larger kernels or more complex functions can be realized by utilizing multiple devices. Unrestricted access to all data ports and addressable coefficient banks provides the LF3347 with considerable flexibility in applica- tions ...

Page 3

DEVICES INCORPORATED ABLE EGISTER ORMATS Register Load Address CS0 000H CS1 001H · · · · · · CS255 0FFH RND0 800H RND1 801H · · · · · · RND15 80FH LMT0 C00H 31-16/15-0 LMT1 ...

Page 4

DEVICES INCORPORATED FUNCTIONAL DESCRIPTION Coefficient Banks The LF3347 has four coefficient banks which feed coefficient values to the multipliers. Each bank can store 256 12-bit coefficients. In the example shown in Table 3, address 10 in coeffi- cient banks 1 ...

Page 5

DEVICES INCORPORATED M R Above which useful life may be impaired (Notes AXIMUM ATINGS Storage temperature ........................................................................................................... –65°C to +150°C Operating ambient temperature ........................................................................................... –55°C to +125°C V supply voltage with respect to ground ............................................................................ –0.5 ...

Page 6

DEVICES INCORPORATED SWITCHING CHARACTERISTICS OMMERCIAL PERATING ANGE Symbol Parameter t Cycle Time CYC t Clock Pulse Width Low PWL t Clock Pulse Width High PWH t Input Setup Time S t Input Hold Time H t Output ...

Page 7

DEVICES INCORPORATED OMMERCIAL PERATING ANGE Symbol Parameter t Control Coefficient Interface Cycle Time CCCYC t Control Coefficient Clock Pulse Width Low CCWL t Control Coefficient Clock Pulse Width High CCWH t Control Coefficient Enable Setup Time CCENS ...

Page 8

DEVICES INCORPORATED NOTES 1. Maximum Ratings indicate stress specifications only. Functional oper- ation of these products at values beyond those indicated in the Operating Condi- tions table is not implied. Exposure to maximum rating conditions for ex- tended periods may ...

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... Top 15 16 View Plastic Quad Flatpack (Q1) S CREENING LF3347QC15 LF3347QC12 9 LF3347 ...

Page 10

DEVICES INCORPORATED ORDERING INFORMATION ...

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