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PDF LF3347 Data sheet ( Hoja de datos )
| Número de pieza | LF3347 | |
| Descripción | High-Speed Image Filter with Coefficient RAM | |
| Fabricantes | LOGIC Devices Incorporated | |
| Logotipo |  |
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DEVICES INCORPORATED
DEVICES INCORPORATED
LF3347
LF3347High-Speed Image Filter with Coefficient RAM
High-Speed Image Filter with Coefficient RAM
FEATURES
DESCRIPTION
u 83 MHz Data Input and Compu-
tation Rate
u Four 12 x 12-bit Multipliers with
Individual Data and Coefficient
Inputs
u Four 256 x 12-bit Coefficient Banks
u 32-bit Accumulator
u Selectable 16-bit Data Output with
User-Defined Rounding and Limiting
u Two’s Complement Operands
u 3.3 Volt Power Supply
u 5 Volt Tolerant I/O
u 120-pin PQFP
LF3347 BLOCK DIAGRAM
12
CC11-0
LD
LF
INTERFACE
CCCLK
ENBA
8
A7-0
Coefficient
Bank 1
(256 x 12-bit)
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.
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, CC11-0, is registered
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
Coefficient
Bank 2
(256 x 12-bit)
Coefficient
Bank 3
(256 x 12-bit)
Coefficient
Bank 4
(256 x 12-bit)
D111-0 ENB1
12 12
2
D211-0 ENB2
12 12
2
D311-0 ENB3
12 12
2
D411-0 ENB4
12 12
2
25
ACC 3
SHIFT4-0
5
5
OE
CLK TO ALL REGISTERS
32
Rounding
5 Selecting
Limiting
Circuit
16
16
S15-0
1
25
SELRND3-0 SELLMT3-0
44
46
44
LMTEN
6
Rounding/
Limiting
Registers
OCEN
NOTE: NUMBERS IN REGISTERS INDICATE
NUMBER OF PIPELINE DELAYS
Video Imaging Products
08/16/2000–LDS.3347-G
1 page  
DEVICES INCORPORATED
LF3347
High-Speed Image Filter with Coefficient RAM
MAXIMUM RATINGS Above which useful life may be impaired (Notes 1, 2, 3, 8)
Storage temperature ........................................................................................................... –65°C to +150°C
Operating ambient temperature ........................................................................................... –55°C to +125°C
VCC supply voltage with respect to ground ............................................................................ –0.5 V to +4.5 V
Input signal with respect to ground .......................................................................................... –0.5 V to 5.5 V
Signal applied to high impedance output ................................................................................. –0.5 V to 5.5 V
Output current into low outputs ............................................................................................................. 25 mA
Latchup current ............................................................................................................................... > 400 mA
ESD Classification (MIL-STD-883E METHOD 3015.7) ...................................................................... Class 3
OPERATING CONDITIONS To meet specified electrical and switching characteristics
Mode
Active Operation, Commercial
Active Operation, Military
Temperature Range (Ambient)
0°C to +70°C
–55°C to +125°C
Supply Voltage
3.00 V ≤ VCC ≤ 3.60 V
3.00 V ≤ VCC ≤ 3.60 V
ELECTRICAL CHARACTERISTICS Over Operating Conditions (Note 4)
Symbol Parameter
Test Condition
VOH Output High Voltage
VCC = Min., IOH = –4 mA
VOL Output Low Voltage
VCC = Min., IOL = 8.0 mA
VIH Input High Voltage
VIL Input Low Voltage
(Note 3)
IIX Input Current
Ground ≤ VIN ≤ VCC (Note 12)
IOZ Output Leakage Current Ground ≤ VOUT ≤ VCC (Note 12)
ICC1 VCC Current, Dynamic
(Notes 5, 6)
ICC2 VCC Current, Quiescent (Note 7)
CIN Input Capacitance
TA = 25°C, f = 1 MHz
COUT Output Capacitance
TA = 25°C, f = 1 MHz
Min Typ Max Unit
2.4 V
0.4 V
2.0 VCC V
0.0 0.8 V
±10 µA
±10 µA
150 mA
2 mA
10 pF
10 pF
Video Imaging Products
5 08/16/2000–LDS.3347-G
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet LF3347.PDF ] | |
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