Sony DFW-X700, DFW-SX900 technical manual Command Setting and Operation Timing

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DFW-SX900

DFW-X700

COMMAND SETTING AND OPERATION TIMING

The DFW-SX900/X700 operates synchronously with internal pulses called VD. VDs are reference signals inside the camera and cannot be observed from outside the camera.

Even if commands are set to the CSR of the camera, it does not mean that they become effective the instant they have been written. They become effective after the VD period set to the CSR has been completed and the next VD pulse is generated as shown in the following figure. The command settings are set for video signals by the Isochronous output after that. (The timing at which the command settings become effective may delay according to the internal state of the camera.)

When operating at a low frame rate even if the transmission time of one frame exceeds one VD, and the CSR settings are changed during transmission, the command settings will not be set to the video signals until the frame currently being output is complete.

 

 

 

 

 

 

 

 

 

Setting becomes effective in

Set command to CSR in this period

 

 

 

next VD period (or the next)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Command settings are set to isochronous

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

output after setting becomes effective

 

 

 

 

 

 

 

 

 

 

 

 

Isochronous

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Isochronous

1 V = Approx. 133 ms (DFW-SX900)

When low frame rate is selected, command

Approx. 67 ms (DFW-X700)

 

settings are set to isochronous output after

 

completion of isochronous output before setting

Isochronous Transmission Start/Stop command and actual operation timing

As shown in the following figure, it takes at least about 1 V for the actual isochronous transmission of image data to start or stop after the Isochronous Start/Stop command (CSR F0F00614h: ISO_EN) has been set to the CSR of the camera. (VDs are the reference signals inside the camera and cannot be observed from outside the camera.)

Isochronous transmission start/stop is executed in units of frames. Isochronous transmission will not start/stop before one image output ends. This means that if a low frame rate at which the transmission of one image takes a long time is selected, the time taken for executing Isochronous Stop will be long.

Set Iso ON/OFF in this period

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VD

 

 

 

1 V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Approx. 8.0 ms (DFW-SX900)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Approx. 2.4 ms (DFW-X700)

Isochronous

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

ON/OFF is executed with an

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

interval of 1 V from V period set

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Isochronous

 

 

 

 

OFF

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low Frame Rate

7.5Frame/s (DFW-SX900) 15 Frame/s (DFW-X700)

If Shutter (CSR F0F0081Ch) is set to the extended exposing mode, command execution may delay for the exposure time at maximum in addition to the previous delay for both Isochronous Start/Stop.

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Contents Technical Manual Table of Contents Main Features OutlineSystem Components Specifications Connection Pin assignment of camera connector Pin assignment of Trig in connector femaleNames and Functions of Parts Dimensions CCD Pixel Location Top ViewSpectral Characteristics Typical Values Functions Camera FunctionsGain ShutterAuto Exposure BrightnessColor Temperature GammaSharpness White BalanceSaturation Isochronous Start/StopOne Shot TriggerOperations in Normal Mode When exposure time is 1 frame or shorterOperations in Normal Mode Time until Data is Read Out and Output Period of DataWhen exposure time is over 1 frame Operations When Frame Rate is ReducedInside Camera SUB Isochronous Front Panel LED External Trigger Shutter Inputting trigger and pulse conditionsExternal Trigger Shutter Operations Example of Acceptable Trigger Interval Camera Exposure TimePartial Scan Mode Cutting sizeCSR F0F00000h Camera Initialize Register Write Only CSR F0F00600h Current Frame RateCSR F0F00604h Current Video Mode CSR F0F00608h Current Video FormatCSR F0F0060Ch CSR F0F00614h Isochronous Transmission Start/StopCSR F0F00618h Memory Save CSR F0F0061Ch One ShotCSR F0F00620h Memory Save Channel CSR F0F00624h Current Memory ChannelCSR F0F00804h Auto Exposure CSR F0F00800h BrightnessCSR F0F00808h Sharpness CSR F0F0080Ch White Balance One-Push Auto White BalanceCSR F0F00814h Saturation CSR F0F00810h HueCSR F0F00818h Gamma Auto exposure CCD Iris CSR F0F0081Ch ShutterShutter OFF CSR F0F00820h Gain CSR F0F00830h TriggerCSR F0F0088Ch Optical Filter Auto Gain ControlFor Format7 CSR F1000108h Image PositionWhen DFW-SX900 When DFW-X700CSR F100000Ch Image Size Minimum Unit for DFW-SX900 Minimum Unit for DFW-X700CSR F1000110h Color Coding ID CSR F1000144h Byte per PacketGeneral precautions for partial scan function Command Sending Procedure Until Images are Displayed Acquiring the camera control register base addressAcquiring the format/mode/frame rate Check available formatsCheck available video modes Check available frame rates Example Format0 Mode3Video transmission start command To set the trigger modeProcedure for Format7 Aquire the available mode for Format7Acquire the CSR offset address of Mode0 Acquire the MaxSize/UnitSize/ColorCodingIDVideo transmission start command Format7 Specify the packet sizeCommand Setting and Operation Timing Trigger Mode command and actual operation timing One Shot CMD and actual operation timingCamera List of Camera Functions SupplementsIEEE1394 Cable Recommended Specifications for Personal Computer PC FeaturesHost Adapter Card DFWA-400 Specifications Installing the Host Adapter Card Precautions Setup of the DriverPrecautions on software provided Setting up the driver Setting up the demonstration softwareFor Windows For Windows NT4.0Page DFW-SX900
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