參數(shù)資料
型號: S5K437CA
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 1/4 Optical Size 640x480 (VGA) 2.8V CMOS Image Sensor
中文描述: 1 / 4光學(xué)尺寸640 × 480(VGA)的2.8V的CMOS圖像傳感器
文件頁數(shù): 26/36頁
文件大小: 285K
代理商: S5K437CA
1/4 INCH VGA CMOS IMAGE SENSOR
S5K437CX
22
2-4. Quadrisectional Global Gain Control
You can control the global gain to change the gain for all color channels on the Global Gain Control Registers
(
sgg1
,
sgg2
,
sgg3
,
sgg4
). The global gain control register is composed of four register groups and each register
value decides the gain for each quarter section of output code level.
Global Gain = (
sgg
[3:0]+1) / 8
-20
-15
-10
-5
0
5
10
0
2
4
6
8
10
12
14
16
Programmable Gain Control
G
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0
2
4
6
8
10
12
14
16
Programmable Gain Control
R
Figure 7. Relative Global Gain
The ADC gain is dependent on
MCLK
frequency (not on
DCLK
frequency) and ADC resolution. The default global
gain is set for typical
MCLK
frequency (24.54MHz) and 10-bit ADC. When the frequency and ADC resolution are
changed, the global gain should be changed in order that the resulting gain should be maintained over unity to
ensure appropriate ADC conversion range.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
MCLK frequency (MHz)
M
10-bit ADC resolution
9-bit ADC resolution
8-bit ADC resolution
Figure 8. Recommended Minimum Global Gain Control Value
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