CMV2000 datasheet(49/87 Pages) AMSOSRAM

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CMV2000

Functional description

Datasheet

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7.4

Configuring exposure and readout

This section explains how the CMV2000 can be programmed using the on-board sequencer

registers.

7.4.1

Exposure modes

The exposure time can be programmed in two ways, externally or internally. Externally, the

exposure time is defined as the time between the rising edge of T_EXP1 and the rising edge of

FRAME_REQ (see External exposure time for more details). Internally, the exposure time is

set by uploading the desired value to the corresponding sequencer register.

Table 11: Time settings of exposure mode

Default value

Description of the value

Exp_ext

41[0]

0: Value in Exp_time register defines exposure time

1: Time between T_EXP1 and FRAME_REQ pulses

defines exposure time

Exp_time

42[7:0]

43[7:0]

44[7:0]

2048

If Exp_ext = 0:

Defines the exposure time according to the following

formula:

129 ∗ ��_��(0.43 ∗ ��_��ℎ + ��_��)

Where clk_per is the period of the master input clock

and fot_length is the value in register 73.

If Exp_ext = 1:

The exposure time is:

129 ∗ ��_��(0.43 ∗ ��_��ℎ)

+ ��

Where external exposure time is the time between

T_EXP1 and FRAME_REQ.

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