kac-9628 ETC-unknow, kac-9628 Datasheet - Page 15

• Manufacturer Part Number: kac-9628
• Description: Kodak Kac-9628 Cmos Image Sensor 648 H X 488 V High Dynamic Range 30 Fps Color Cis
• Manufacturer: ETC-unknow

IMAGE SENSOR SOLUTIONS
Functional Description
5.0
5.1
A frame is defined as the time it takes to reset every pixel in the
array, integrate the incident light, convert it to digital data and
present it on the digital video port. This is not a concurrent pro-
cess and is characterized in a series of events each needing a
certain amount of time as shown in Figure 20.
The following factors effect frame rate, the:
• frequency of Hclk
• size of the “Scan Window”
• sub sampling mode
• programmed row delay
• programmed frame delay.
The following factors effect exposure but not frame rate
• analog gain
• integration time
• modification of the sensor’s linear response.
This section describes how to program the frame rate and expo-
sure time.
www.kodak.com/go/imagers 585-722-4385
FRAME RATE & EXPOSURE CONTROL
Introduction
Figure 20. Frame Readout Flow Diagram
Yes
Transfer all pixels to CDS
Shift all pixels out of row
Reset all pixels in row
Row address = 0
Row delay time
Row address + 1
Last row?
Start
(continued)
No
15
5.2
There are two analog gain stages built into the sensor before the
A/D allowing the video and separate color gains to be pro-
grammed.
The video gain is given by:
Where:
The red gain is given by:
Where:
The green gain is given by:
Where:
The blue gain is given by:
Where:
VidGain
RGain
GGain
BGain
Analog Gain and Color Gain
VGAIN register
RGAIN register
GGAIN register
BGAIN register
V
G
R
is the six bit video gain step programmed in the
is the six bit video gain step programmed in the
is the six bit video gain step programmed in the
B
is the six bit video gain step programmed in the
gain
gain
gain
gain
= 1+ 0.07032 * VidGain
= 1 + 0.03125 * RGain
= 1 + 0.03125 * GGain
= 1 + 0.03125 * BGain
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