VV5430

Control Signals for Image Digitisation

CD5430F-A

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5.

Control Signals for Image Digitisation

The VV5430 sensor can be used with an Analog-to-Digital Converter (ADC) and the necessary logic to form an image capture

and processing system. The camera provides an analogue video output together with digital signals to qualify this output and

synchronise image capture.

The signals provided for image capture are the following:-

• PV,PVB: (Pixel Valid, PV Bar) Complementary signals, their leading edges qualify valid pixel levels.

• LST: (Line STart) The rising edge signals the start of a visible line.

• FST: (Field STart) The rising edge signals the start of a field.

• ODD: Identifies an odd field within a frame.

• CPE (Clock Pulse Enable): Disables generation of PV/PVB and LST signals. The state of this pin is sampled

only during a system reset. Its state after reset can be overridden via the serial interface using Set-up Code_2.

The following diagram illustrates the relative timing of the image capture signals. Scale is not actual but edge succession is

preserved.

Figure 6 : Frame Capture signal timing

LST

AVO

PV

PVB

FST

ODD

Todd