kac-9617 ETC-unknow, kac-9617 Datasheet - Page 18

• Manufacturer Part Number: kac-9617
• Description: Kodak Kac-9617 Cmos Image Sensor
• Manufacturer: ETC-unknow

IMAGE SENSOR SOLUTIONS
Functional Description
The KAC-9617 integrated timing and control circuit allows up to
two break points to be programmed such that a piecewise linear
response can be achieved as shown with the green lines in fig-
ure 21.
To operate the sensor in piecewise linear mode a 56k ohm resis-
tor must be connected to pin 41 and the following sequence
must be written after system reset:
Two registers are provided to define each break point. The Level
register and the Sensitivity register.
The sensitivity of the first branch, (slope 0 in figure 22), is deter-
mined by the time settings and the image sensor characteristics.
The sensitivity (slope), of the other branches is determined by
the value programmed in the Sensitivity registers. The levels at
which the piecewise linear curve switches from one slope to
another are determined by the values programmed in the Level
registers.
5.7
The table bellow can be used as a guide for programming the sensor. Note that it is assumed that the sensor is being driven with a
48MHz clock. All programmed values are given in decimal.
www.kodak.com/go/imagers 585-722-4385
register
address
Address (Hex)
Frame Rate Programming Guide
3.125
3.75
12.5
6.25
7.5
fps
30
15
25
5
4
3
2
1
03Hex
32Hex
30Hex
03Hex
vclkgen
05hex
4
4
4
4
4
5
5
4
4
5
5
6
6
rdelayh
set bit 3 to a logic 1
set bit 3 to a logic 0
15hex
[10:8]
(continued)
0
0
0
3
0
0
0
0
2
0
0
0
3
40Hex
40Hex
Value
rdelayl
16hex
[7:0]
172
156
255
200
241
12
0
0
0
0
0
0
0
fdelayh
18
17hex
[11:8]
14
10
14
13
15
0
2
6
6
0
1
5
4
The maximum illumination level (see figure 22) that can be
detected by the sensor is determined by the settings of the level
and slope registers.
For a full explanation of how to use the KAC-9617 in piecewise
linear mode refer to LM9618/28 Application note 2.
Level 2
Level 1
fdelayl
18hex
Figure 22. Break Points Programming
[7:0]
226
188
248
126
40
12
12
14
23
12
14
9
0
Saturation level
Slope 0
Illumination (Lux)
srows
Slope 1
0Bhex
[8:1]
0
0
0
0
0
0
0
0
0
0
0
0
0
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Slope 2
0Chex
srowe
[8:1]
251
251
251
251
251
251
251
251
251
251
251
251
251
Maximum
illumination level
dwlsb
12hex
50
50
50
50
50
50
50
50
50
50
50
50
50