AP0100CS datasheet(17/73 Pages) ONSEMI

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AP0100CS/D Rev. 6, Pub. 1/16 EN

©Semiconductor Components Industries, LLC,2016.

AP0100CS HDR: Image Signal Processor (ISP)

Multi-Camera Synchronization Support

The AP0100CS supports multi-camera synchronization through the FRAME_SYNC pin.

The behavior will be different depending if the user is using interlaced or progressive

mode.

When using the interlaced modes, on the rising edge of FRAME_SYNC this will cause the

output to stop the current frame (A) and during B the image output will be indetermi-

nate. On the falling edge of FRAME_SYNC this will cause the re-synchronization to

begin, this will continue for a period (C), during C black fields will be output. The re-

synchronized interlaced signal will be available at D. During C if the user toggles the

FRAME_SYNC input the AP0100CS will ignore it, the user cannot re-synchronize again

until at D.

Figure 9:

Frame Sync Behavior with Interlaced Mode

When using progressive mode, the host (or controlling entity) ‘broadcasts’ a sync-pulse

to all cameras within the system that triggers capture. The AP0100AT will propagate the

signal to the TRIGGER_OUT pin, and subsequently to the attached sensor's TRIGGER

pin.

The AP0100CS supports two different trigger modes when using progressive output. The

first mode supported is ‘single-shot’; this is when the trigger pulse will cause one frame

to be output from the image sensor and AP0100CS (see Figure 10).

Figure 10:

Single-Shot Mode

Note:

This diagram is not to scale.

The second mode supported is called 'continuous', this is when a trigger pulse will cause

the part to continuously output frames, see Figure 11. This mode would be especially

useful for applications which have multiple sensors and need to have their video

streams synchronized (for example, surround view or panoramic view applications).

FRAME_SYNC

CVBS output

(NTSC/PAL)

FRAME_SYNC

TRIGGER_OUT

FV_OUT

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