參數(shù)資料
型號(hào): CH5101A
廠商: Electronic Theatre Controls, Inc.
英文描述: CMOS Monochrome Digital Video Camera
中文描述: 單色的CMOS數(shù)碼攝像機(jī)
文件頁數(shù): 26/32頁
文件大小: 132K
代理商: CH5101A
26
201-0000-033 Rev 1.0, 6/2/99
CHRONTEL
CH5101A
‘Y[7:0]’ output of 2-D filter
Figure 12: ASW Register Possible Windows
Auto-Shutter Black Count Threshold
Symbol:ASBC
Address:1Fh
Bits:8
Bits 2-0 of register ASBC determine the black threshold used by the auto-shutter algorithm. The value used is
8*ASBT+3. Bits 7-3 of register ASBC determine the number of pixels below the ASBT level. When the number of
pixels is less than this value, the autoshutter algorithm will adjust the black level downwards. When the number of
pixels is greater than this value, the black level will be adjusted upwards.
Auto-Shutter White Count Threshold
Symbol:ASWC
Address:20h
Bits:8
The number of pixels above the white level is compared to the ASWC value to determine the direction that the
shutter value should be changed.
Table 12. Autoshutter Algorithm Input
ASME
ASCSC
Input to Autoshutter Algorithm
0
0
0
1
A/D output
1
x
MAX (A/D, Y[7:0])
BIT:
SYMBOL:
7
6
5
4
3
2
1
0
ASBC4
ASBC3
ASBC2
ASBC1
ASBC0
ASBT2
ASBT1
ASBT0
TYPE:
DEFAULT:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
1
1
1
1
0
0
1
BIT:
SYMBOL:
7
6
5
4
3
2
1
0
ASWC7
ASWC6
ASWC5
ASWC4
ASWC3
ASWC2
ASWC1
ASWC0
TYPE:
DEFAULT:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
0
0
0
0
0
0
0
0
1
2
3
4
6
8
5
7
9
1
1
1
13
14
15
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