CMV2000

Functional description

Datasheet

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DS000734

• v8-00 • 2025-Jul-07

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When the exposure time is shorter than the read-out time, the FOT and read-out of the next

frame will start immediately after the read-out of the previous frame. Keep in mind that the next

FRAME_REQ pulse has to occur after the FOT of the current frame. For an exact calculation

of the exposure time, see chapter 7.4.1.

When a new FRAME_REQ is applied, the exposure of the next frame will be delayed so that

the FOT begins right after the read-out time of the current frame.

Figure 26: Request for 2 frames in internal exposure mode with exposure time < read-out time

Figure 27: Two requests for 1 frame in internal exposure mode(1)

(1) Only applicable for Version 3.

Timing calculation for version2:

If the exposure time is shorter than the read-out time, keep in mind that when you apply a next

FRAME_REQ pulse during the read-out of the current frame, the exposure of that new frame

will start immediately. Therefore, you have to keep enough time between the two

FRAME_REQ pulses so the read-out times do not overlap. If the FOT of the next frame starts

during the read-out of the current frame, that read-out will be aborted immediately, as shown in

Figure 28. If the exposure time is longer than the read-out time, the read-out times of two

consecutive frames cannot overlap and will not cause a problem. The minimum time between

two FRAME_REQ pulses is given by Equation 3:

Equation 3:

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FRAME_REQ

Frame1_cycle

FOT

Read-out time

Exposure time

Frame2_cycle

FOT

Read-out time

Exposure time

FRAME_REQ

Frame1_cycle

FOT

Read-out time

Exposure time

Frame2_cycle

FOT

Read-out time

Exposure time