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PDF L64250JC15 Data sheet ( Hoja de datos )

Número de pieza L64250JC15
Descripción Histogram/Hough Transform Processor
Fabricantes InnovASIC Inc 
Logotipo InnovASIC  Inc Logotipo



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No Preview Available ! L64250JC15 Hoja de datos, Descripción, Manual

IA64250
Histogram/Hough Transform Processor
FEATURES
Histogram and Hough Transform Calculation
Data Sheet
As of Production Ver. 01
Four 512 X 9 Look-up Tables Provided to Perform User-defined Point-wise
Transformations
Real-time Histogram Equalization
High Data Rates
512 X 24 Accumulation RAM
Pixel Location Function
The IA64250 is a "plug-and-play" drop-in replacement for the original LSI® L64250. This replacement IC
has been developed using innovASIC’s MILESTM, or Managed IC Lifetime Extension System, cloning
technology. This technology produces replacement ICs far more complex than "emulation" while ensuring
they are compatible with the original IC. MILESTM captures the design of a clone so it can be produced even
as silicon technology advances. MILESTM also verifies the clone against the original IC so that even the
"undocumented features" are duplicated. This data sheet documents all necessary engineering information
about the IA64250 including functional and I/O descriptions, electrical characteristics, and applicable timing.
Package Pinout for 68 PLCC PACKAGE:
9 8 7 6 5 4 3 2 1 68 67 66 65 64 63 62 61
10 60
11 59
12 58
13 57
14 56
15 55
16 54
17 53
18 52
19 51
20 50
21 49
22 48
23 47
24 46
25 45
26 44
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
Copyright © 2000
innovASIC
The End of Obsolescence
ENG211001219-01
Page 1 of 21
www.innovasic.com
Customer Support:
1-888 -824-4184

1 page




L64250JC15 pdf
IA64250
Histogram/Hough Transform Processor
Data Sheet
As of Production Ver. 01
I/O SIGNAL DESCRIPTION:
The diagram below describes the I/O characteristics for each signal on the IC. The signal
names correspond to the signal names on the pinout diagrams provide.
I/O Characteristics:
IODV
VDO.0 - VDO.8
CIO.0 - CIO.8
WE
REGADR.0 - REGADR.5
AT
CLK1
CLK2
STARTIO
CX,CY
RX,RY
RESET FP
PO
O WhenHIGH,ACCRAMorLUTRAMdataontheDObusisvalid.
O LUT RAM data output (uses CLK1).
I Control register and LUT input data bus.
I Used to strobe data into mode latches when LOW.
I Selects mode latch, marker or maximum registers.
Selects marker and maximum registers when HIGH or mode latches when LOW.
I AT must be LOW to access the LUT or ACC RAMs via the DO bus.
I Pixel clock active at rising edge.
I User I/O clock (may be connected to CLK1)
I Initiates RAM I/O at HIGH to LOW transition.
I Used to increment X or Y counters when HIGH.
I Resets X or Y counters(overrides CX, CY) when HIGH.
I Resets FP counter when HIGH.
O Test pin should be left unconnected.
Copyright © 2000
innovASIC
The End of Obsolescence
ENG211001219-01
Page 5 of 21
www.innovasic.com
Customer Support:
1-888 -824-4184

5 Page





L64250JC15 arduino
IA64250
Histogram/Hough Transform Processor
Data Sheet
As of Production Ver. 01
Hough Transform Computation:
During Hough Transform computation, the ACC RAM stores the projection image, and the LUT
RAM is loaded with the function listed in the Modified Hough Transform Parameterization Table.
Case
1a
1b
1c
1d
Φ
0 ≤ Φ < 45
45 ≤ Φ < 90
90 ≤ Φ < 135
135 ≤ Φ < 180
r(X,Y,Φ)
X tanΦ + Y
Y cotΦ + X
(YMAX - Y) cot (180 - Φ) + X
(XMAX - X) tan (180 - Φ) + Y
LUT[i]
itanΦ
icotΦ
(YMAX - I) cot (180 - Φ)
(XMAX - I) tan (180 - Φ)
CX,RX
Controls
X
Y
Y
X
CY,RY
Controls
Y
X
X
Y
During initialization, the LUT is loaded with the appropriate transfer function to compute
either f(x) or f(y). Once the LUT is loaded, the X and Y counters are used to generate the
proper memory addresses. The X counter is incremented at each valid pixel and reset at the
beginning of each line. The Y counter is incremented at the beginning of each line and reset
at the beginning of each frame. The control signals for these two counters are generated in
the controller block. As each pixel location along a line is addressed, the grey value at that
point is added to the partial sum in the memory location.
Intensity Averaging:
Another computational mode is possible by generating ACC RAM addresses differently. An
example of this is to compute the average intensity of an image as a function of position.
Consider a 512 X 512 pixel image divided into 256 blocks (16 X 16) of 32 X 32 pixels each.
To compute the average intensity, the Y counter would be incremented every 32 pixels and
reset at the beginning of each line. The X counter would be incremented every 32 lines and
reset at the beginning of a frame. The proper addresses will be generated by multiplying the
X counter output by 16 (this is done via the LUT). After processing, the first 256 locations
of the ACC RAM will hold the accumulated intensity in each 32 X 32 region. Setting sel(3:0)
= 10 will give the average intensity in each region.
Pixel Location:
Pixel location is used to determine the X and Y coordinates of up to 64 specific pixels or
group of pixels in an image. When performing pixel location, the user first loads one of the
LUTs with a table indicating which pixels are of interest. Each pixel in the table is assigned a
6 bit flag that allows the user to distinguish groups of pixels.
Each time an interesting pixel (as specified in the LUT) is found, the X, Y, and flag values
are stored in the ACC RAM at the address given by the FP counter. The FP counter is then
incremented. Note that only 512 values can be stored at any instance. In the event that
more values are stored, the first RAM locations will be overwritten.
Pixel location uses the LUT and the X and Y counters to store a six-bit code and location
information about pixels of interest. The X and Y counters hold the coordinates of the grey
value on the DI pins and are controlled in the same manner described in the Hough
transform section. DI addresses the LUT producing a one-bit tag and a six bit flag
associated with the grey value. If the tag bit is high and DV is high the six bit flag and X, Y
Copyright © 2000
innovASIC
The End of Obsolescence
ENG211001219-01
Page 11 of 21
www.innovasic.com
Customer Support:
1-888 -824-4184

11 Page







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