LM9627CCEA National Semiconductor, LM9627CCEA Datasheet - Page 11

• Manufacturer Part Number: LM9627CCEA
• Manufacturer: National Semiconductor
• Type: CMOSr

Specifications of LM9627CCEA

• Sensor Image Color Type: Color
• Sensor Image Size Range: 250,920 to 480,000Pixels
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 50C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / RoHS Status: Not Compliant

Functional Description
2.0
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 1x1 pixel resolution. The window read out is called the
“Display Window”.
A “Scan Window” must be defined first, by programing the start
and end row addresses as shown in Figure 13. Four coordinates
(start row address, start column address, end row address &
end column address) are programmed to define the size and
location of the “Display Window” to be read out (see Figure 13).
Notes:
• The “Display Window” must always be defined within the
• A “Display Window” can only be read out in the progressive
• By default the “Display Window” is the complete array.
2.1
Two registers (SROWS & SROWE) are provided to program the
size of the scan window. The start and end row address of the
scan window is given by:
Where:
2.2
Five register (DROWS, DROWE, DCOLS, DCOLE and DWLSB)
are provided to program the display window as described in the
register section of this datasheet.
3.0
3.1
In progressive scan readout mode, every pixel in every row in
the display window is 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 14, the read out order will be
a0,b0,...,r0 then a1,b1,...,r1 and so on until pixel r20 is read out.
Confidential
end address
start address
end address
display row
display row
“Scan Window”.
scan mode.
scan row
start address
scan row start address = (2* SwStartRow) + SwLsb
scan row end address = (2* SwEndRow) + 1 + SwLsb
SwStartRow
SwEndROW
SwLsb
scan row
WINDOWING
Programming the scan window
Programming the display window
READ OUT MODES
Progressive Scan Readout Mode
is the contents of the Scan Window start row
register (SROWS)
is the contents of the Scan Window end row reg-
ister (SROWE)
is bit 6 of the Display Window LSB register
(DWLSB)
Figure 13. Windowing
start address
display col
Display Window
(continued)
Active Pixel Array
end address
display col
Scan Window
11
3.2
In interlaced readout mode, pixels are read out in two fields, an
Odd Field followed by an Even Field.
The Odd Field, consisting of all even row pairs contained within
the display window, is read out first. Each pixel in the “Odd Field”
is consecutively read out, one pixel at a time, starting with the
left most pixel in the top most row pair.
The Even Field, consisting of all odd row pairs contained within
the display window, is then read out. Each pixel in the “Even
Field” is consecutively read out, one pixel at a time, starting with
the left most pixel in the top most row pair.
Hence, for the example shown in Figure 15, the display window
is broken up into two fields, as shown in Figure 15. Pixels
a0,b0,...,r0 and a1,b1,...,r1 are readout first and so on until pix-
els a17,b17,...r17 in the even field are read out. The even field
read out is followed by pixels in the odd field, a2,b2,...,r2 then
a3,b3,...,r3 until pixels a19,b19,...,r19
12
13
16
17
10
14
15
18
19
11
1
4
5
8
9
2
3
6
7
0
Interlaced Readout Mode
Figure 14: Progressive Scan Read Out Mode
a b c d e f g h i j k l m n o p q r
a b c d e f g h i j k l m n o p q r
10
12
13
14
15
16
17
18
19
20
11
1
2
3
4
5
6
7
8
9
0
Figure 15: Interlace Read Out Mode
a b c d e f g h i j k l m n o p q r
Column/Horizontal
Column/Horizontal
Even Field
Odd Field
Column/Horizontal
www.national.com