kac-9637 ETC-unknow, kac-9637 Datasheet - Page 12

• Manufacturer Part Number: kac-9637
• Description: Cmos Image Sensor 648 H X 488 V Vga 68 Fps Monochrome Cis
• Manufacturer: ETC-unknow

IMAGE SENSOR SOLUTIONS
Functional Description
2.0
All programmable registers that effect the frame rate and inte-
gration timing are double buffered; such that the new values
only take effect at the start of the new frame. When writing to all
split double buffered registers, e.g. ITIMEH and ITIMEL, the fol-
lowing procedure must be followed:
3.0
The integrated timing and control circuit allows any size window
in any position within the active region of the array to be read out
with a 4x4 pixel resolution. The window read out is called the
“Active Window”.
Four coordinates (start row address, start column address, end
row address & end column address) need to be programmed to
define the size and location of the “Active Window” to be read
out (see Figure 11).
Notes:
• By default the “Active Window” is set to 320 columns by 240
• The “Active Window” registers are double buffered.
• The black pixels are read out at the beginning of each row
WStartRow[10:2]
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WEndRow[10:2]
rows. To program a VGA window aligned to the optical center
to the pixel array the following codes need to be written to the
windowing registers via the I
even when not contained in the active window. The black pixel
read out can be masked by setting the BlKPixelEn bit in the
DVBUSCONFIG2 register to a logic 0.
start address
end address
- to change both the MSB and LSB, first write to the MSB
- to change only the MSB, first write to the MSB register
- to only change the LSB write to the LSB register.
19h
1Ah
1Bh
1Ch
1Dh
1Eh
register and then write to the LSB register,
and then write the unchanged value of the LSB to the
LSB register,
row
DOUBLE BUFFERED REGISTERS
WINDOWING
row
Figure 11. Windowing
WColStart[10:2]
start address
WROWS
WROWE
WROWLSB
WCOLS
WCOLE
WCOLLSB
column
Active Window
2
C interface
(continued)
Active Pixel Array
WColEnd[10:2]
end address
00h
3Bh
23h
00h
50h
23h
column
12
4.0
The pixels in the array are read out in progressive scan. In pro-
gressive scan, every pixel in every row in the defined “Active
Window” is consecutively read out, one pixel at a time. The first
8 pixels of every row are black unless masked out by setting the
BlkPixelEn bit of the DVBUSCONFIG2 register to a logic 0.
The scan direction can be programmed as follows:
4.1
The default scan direction is to consecutively read out, one pixel
at a time, starting with the left most pixel in the top most row.
Hence, for the example shown in Figure 12, the read out order
will be a0,b0,...,r0 then a1,b1,...,r1 and so on until pixel r20 is
read out. See figure 12.
4.2
The vertical scan direction can be reversed by setting the
“VScanDir” bit in the VSCAN register to a logic 0, while setting
the HScanDir bit in the HSCAN register to a logic 1. In this case
for the example shown in Figure 12, the read out order will be
a10,b10,...,r10 then a9,b9,...,r9 and so on until pixel r0 is read
out.
4.3
The horizontal scan direction can be reversed by setting the
“HScanDir” bit in the HSCAN register to a logic 0, while setting
the “VScanDir” bit in the VSCAN register to a logic 1. In this
case for the example shown in Figure 12, the read out order will
be r0,q0,...,a0 then r1,q1,...,a1 and so on until pixel a10 is read
out.
4.4
The horizontal scan direction can be reversed by setting both
the “HScanDir” bit in the HSCAN and the “VScanDir” bit in the
VSCAN register to a logic 0. In this case for the example shown
in Figure 12, the read out order will be r10,q10,...,a10 then
r9,q9,...,a9 and so on until pixel a0 is read out.
Scan Direction
Default Scan Direction
Reverse Vertical Scan
Direction
Reverse Horizontal Scan
Direction
Reverse Vertical and Hori-
zontal Scan Direction
ARRAY READOUT
Default Scan Direction
Reverse Vertical Scan Direction
Reverse Horizontal Scan Direction
Reversing The Horizontal & Vertical Scan Direction
Figure 12. Progressive Scan Read Out Mode
10
0
1
2
3
4
5
6
7
8
9
a b c d e f g h i j k l m n o p q r
Column/Horizontal
VScanDir
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1
0
1
0
HScanDir
1
1
0
0