NED
XCM6040SAT2 UME-0027-03
76
②
For an integration time ratio of 5, send the following commands: “msl 0, 0, 8”; “mst 0, 0,
11”; “int 9, 66”, then set multi-slope mode by sending the command “inm 3” or “inm 4”. The
integration time becomes 55 in the first slope, 11 in the second slope, and the knee point
becomes ½ of the saturation level, as shown in the diagram below.
The minimum line period is 38.4us (240MHz), or 57.6us (160MHz). The amount of
saturation exposure is 0.05+0.25=0.3. The dynamic range becomes 3 times 1 (ratio of
saturation exposure amount: 0.3/0.1), i.e. 69.5dB (60dB + 20log3=69.5)
0
255
511
767
1023
o
u
tp
u
t（
1
0
b
it
d
ig
it
a
l
d
a
ta
)
light exposure
（lux･sec)
0.05
0.55
Amount of saturation exposure
The second slope
The first slope
0
255
511
767
1023
o
u
tp
u
t（
1
0
b
it
d
ig
it
al
d
at
a）
light exposure
（lux･sec）
0.05
0.25
Amount of saturation exposure
The first slope
The second slope
