STV-DCASLASHCIF-E01 datasheet(15/60 Pages) STMICROELECTRONICS

15 / 60 page

STV0680A + VV6444/6410/6500

Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000

PRELIMINARY

CDSTV0680F-C

Commercial in confidence

STV0680F_contents.fm

RS232 receives start bit from host software (only if no USB detected)

3. USB connection detected

4. If in USB suspend mode, USB driver re-starts communications with the camera as per USB specification

3.2

‘Snapshot’ mode (in High or Low resolution)

3.2.1

Entering this mode

This is the default mode on wake-up when not tethered to the PC, i.e. pressing the Mode button while in standby mode, or

powering up the camera. On entering this mode, the current resolution (i.e. ‘Hr’ or ‘Lr’) is displayed briefly, and there is a brief

pause (approx. 1second) during which pictures cannot be taken. This is to allow the Auto-exposure and Gain control to settle.

The LCD then displays the number of pictures still available.

3.2.2

Description

Using the shutter button, ‘Snapshot’ mode allows single pictures to be grabbed using the capture button. The LCD displays the

number of pictures still available. Auto-exposure and gain are continuously enabled. The camera grabs an image when the

capture button is pressed, if sufficient light is available, the exposure and gain algorithm is settled, and picture counter has not

reached its maximum. Image data is stored in memory and picture counter is decremented.

3.2.3

Exiting this mode

After 30 seconds of non-activity, while not tethered to the PC, the camera goes into Standby mode.

3.3

‘Continuous Capture’ mode (in High or Low resolution)

3.3.1

Entering this mode

Enabled using the mode button (from ‘Snapshot’ mode, press once).

3.3.2

Description

The LCD displays “Ct”. Auto-exposure and gain are continuously enabled. While the shutter button is pressed, the user can

activate continuous capture at approx. 12.5 frames per second, to allow recording of a ‘video’ sequence, whether or not the

camera is tethered to the PC, and regardless of whether enough light is available. The picture counter is decremented once per

frame. The continuous image data is stored in memory and can then be downloaded to the PC. Once the memory is full, the user

is alerted by an audible tone. It is possible to store a mixture of still images and ‘Continuous’ images in memory.

3.3.3

Exiting this mode

After 5 seconds of non-activity, or after releasing the shutter button, the camera returns to standby mode.

3.4

Self-timer Mode (in High or Low resolution)

3.4.1

Entering this mode

Enabled using the mode button (from ‘Snapshot’ mode, press twice).

3.4.2

Description

The LCD displays “St”. Auto-exposure and gain are continuously enabled. When the shutter button is pressed, the camera counts

down 10 seconds, then grabs an image, if sufficient light available and exposure and gain algorithm settled, and picture counter

has not reached its maximum. Image data is stored in memory and picture counter is decremented.

3.4.3

Exiting this mode

After 5 seconds of non-activity, or after the timer has counted down 10 seconds, the camera returns to standby mode.

3.5

‘Clear camera’

3.5.1

Entering this mode

Enabled using the mode button (from ‘Snapshot’ mode, press three times).

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