LR38269 查看數據表（PDF） - Sharp Electronics
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LR38269 Datasheet PDF : 20 Pages
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LR38269
AUTOMATIC CAMERA FUNCTION
CONTROL
Automatic Electronic Exposure Control
Electronic shutter speed is controlled so that the
exposure control data approach to the data of
address 04h.
Under BLC mode, the data of address 07h is
available instead of address 04h.
After the exposure control data is less than the data
of address 05h, an electronic shutter speed is hold.
And then AGC gain is controlled so that the
exposure control data will be less than the data of
address 06h.
In the case of coming more than the data of
address 07h, exposure control starts again.
Electronic Shutter Speed Setting
By either hardware or coefficient data, electronic
shutter speed below is selectable.
EEMDS
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
EEMD1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
EEMD2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
EEMD3
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
ELECTRONIC SHUTTER SPEED
NTSC
PAL
1/60 s
1/50 s
1/100 s
1/120 s
1/250 s
1/250 s
1/500 s
1/500 s
1/1 000 s
1/1 000 s
1/2 000 s
1/2 000 s
1/5 000 s
1/5 000 s
1/10 000 s
1/10 000 s
1/20 000 s
1/20 000 s
1/50 000 s
1/50 000 s
1/100 000 s
1/100 000 s
1/30 s
1/25 s
1/15 s
1/12.5 s
1/7.5 s
1/6.25 s
AUTO
AUTO
1/60 to 1/100 000 s
1/50 to 1/100 000 s
AUTO
AUTO
1/60 to 1/100 000 s
1/50 to 1/100 000 s
Slower shutter speed less than 1/60 s (1/50 s of
PAL) can make images whose interval is every two
fields, every four fields, etc..
VD pulse is also converted to the same frequency
as the output image rate.
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