參數(shù)資料
型號(hào)： VV5430
廠商： Electronic Theatre Controls, Inc.
英文描述： Integrated CMOS Image Sensor with support for ADC and external control via serial interface
中文描述： 集成CMOS ADC和與外部控制支持通過(guò)串行接口圖像傳感器
文件頁(yè)數(shù)： 13/32頁(yè)
文件大?。?/td> 288K
代理商： VV5430
09/04/97
13
Control Signals for Image Digitisation
Peimnry
CONTROL SIGNALS FOR IMAGE DIGITISATION
The VV5430 camera 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.
Frame Capture signal timing
LST
AVO
PV
PVB
FST
ODD
T
fst
T
lst
T
field
T
line
T
blank
T
porch
T
pv
Todd
T
phd
T
psu
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