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the pixels that constitute the image. These pixels will represent the light received during the previous
exposure interval. Waveforms illustrating this method are shown below:
SI
CLK
1
2 3 4 5 6 7 8 9 10
Tri-
Stated
AO
In one-shot imaging, the TSL1401R is left idle until it's time to snap a picture. Then SI clocked in, and
128 pixels are rapidly clocked out and discarded. Then you simply wait until the desired exposure time
(since the SI pulse) has elapsed and pulse SI again. At this point, you can clock out the pixels resulting
from the timed exposure. Here is a sample waveform:
IDLE
SI
CLK
1
Tri-
Stated
AO
In all the discussion that follows, we will be using one-shot imaging.
© Bueno Systems, Inc. • TSL1401-DB (2009.10.01)
Clock out scan n-1
Integrate scan n
. . .
Clock out garbage
Integrate scan
129
Tri-
Stated
Clock out scan n
Integrate Scan n+1
129
1
2 3 4 5 6 7 8 9 10
Tri-
Stated
Clock out scan
1
2 3 4 5 6 7 8 9 10
. . .
129
Tri-
Stated
. . .
129
Tri-
Stated
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IDLE
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