CMV2000 datasheet(55/87 Pages) AMSOSRAM

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CMV2000

Functional description

Datasheet

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7.4.2.3

Multi-frame read-out

The sensor has the possibility to read-out multiple frames with increasing exposure time for

each frame. The exposure time step and number of frames can be programmed using the

appropriate registers. The frames grabbed in this mode, can be combined to create one high

dynamic range image. This combination needs to be made by the receiving system.

The following registers should be used when this multi-frame read-out is selected. This mode

only works with internal exposure time setting.

Table 17: Multi-frame read-out mode register settings

Default value

Description of the value

Exp_time

42[7:0]

43[7:0]

44[7:0]

1088

Defines the exposure time of the first frame in the

sequence. Formula:

129 ∗ ��_��(0.43 ∗ ��_��ℎ + ��_��)

Where clk_per is the period of the CLK_IN input

clock.

Exp_step

45[7:0]

46[7:0]

47[7:0]

Defines the step size for the increasing exposure

times in multi-frame read-out. This value will be

added to Exp_time per frame. So the exposure time

for the nth frame is:

129 ∗ ��_��(0.43 ∗ ��_��ℎ + ��_�� + (�� − 1)

∗ ��_��)

Where clk_per is the period of the CLK_IN input

clock and n is the nth frame.

Exp_seq

55[7:0]

Defines the number of frames to be read-out in

multi-frame mode (min = 1, max = 255).

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