CMV300 datasheet(32/56 Pages) AMSOSRAM

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Reference:CMV300-datasheet-v2.11

CMV300 Datasheet

Page 30 of 54

Default value

Description of the value

Nr_slopes

The value in this register defines the number of slopes

(min=1, max=3).

Vtfl2

113[6:0]

The value in this register defines the Vtfl2 voltage (DAC

setting) of kneepoint 1.

Bit[6] = enable (=1)

Bit[5:0] = value (0-64)

Vtfl3

114[6:0]

The value in this register defines the Vtfl3 voltage (DAC

setting) of kneepoint 2.

Bit[6] = enable (=1)

Bit[5:0] = value (0-64)

The timing that needs to be applied in this external exposure mode looks like the one below.

Frame_REQ

T_EXP1

Total exposure time

Exposure kp2

Exposure kp1

FIGURE 34: PIECEWISE LINEAR RESPONSE WITH EXTERNAL EXPOSURE MODE

In this case the T_EXP1 pulses should be one CLK_IN period wide exactly. When shorter, they might not be detected

and when longer, this will be seen as 2 (or more) pulses one after the other, which will not give a useable image.

Please note, that a combination of the piecewise linear response and interleaved read-out is not possible.

5.3 WINDOWING

To limit the amount of data or to increase the frame rate of the sensor, windowing in Y direction is possible. The number

of lines and start address can be set by programming the appropriate registers. The CMV300 has the possibility to read

out multiple (max=8) predefined subwindows in one read-out cycle. The default mode is to read-out one window with

the full frame size (648 x 488).

5.3.1 SINGLE WINDOW

When a single window is read out, the start address and size can be uploaded in the corresponding registers. The default

start address is 0 and the default size is 488 (full frame).

Windowing – single window

Default value

Description of the value

start1

3-4

The value in this register defines the start address of the

window in Y (min=0, max=487)

Number_lines

1-2

488

The value in this register defines the number of lines read

out by the sensor (min=1, max=488)

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