SAA8103 データシートの表示（PDF） - Philips Electronics

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SAA8103

Pulse Pattern Generator for Frame Transfer CCD (PPGFT)

Philips Electronics 

Philips Semiconductors

Pulse Pattern Generator for Frame Transfer

CCD (PPGFT)

Objective specification

SAA8103

9 OPERATING MODES

For Full Frame CCD and Frame Transfer CCD there are two modes for data read-out: Shot mode and Preview mode.

Shot mode is used to take an image using an external trigger signal; e.g. camera shutter. Preview mode is used to take

an image continuously with a fixed (preset) integration; e.g. to show an image on the LCD display of a Digital Still Camera

(DSC).

9.1 Full Frame CCD

In the Shot mode, the SAA8103 takes the external input signal TRG, as the trigger signal. After the rising edge of TRG,

the charge reset pulses (CR) are generated for the appropriate period. Integration time is held until the falling edge of

the TRG signal. A drive signal is generated in each VD period but is not issued until the next event of the TRG signal.

In the Preview mode, the SAA8103 generates a drive signal in every frame. The Preview mode it is not influenced by the

TRG signal. The integration time is controlled using the INTTIME command; see Chapter 11, addresses 1 and 2.

The Shot mode and Preview mode for Full Frame CCD is shown in Fig.4.

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TRG

CR

VD

Data read-out

Preview mode

VD

CR

Data read-out

2001 Oct 22

integration time

integration time

Fig.4 Data read-out of Full Frame CCD.

10

FCE854

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