STV-DCA/VGA-E01 STMICROELECTRONICS [STMicroelectronics], STV-DCA/VGA-E01 Datasheet - Page 15

• Manufacturer Part Number: STV-DCA/VGA-E01
• Description: Low Cost Digital Camera (LCDC) Chipset
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STV0680A + VV6444/6410/6500
3.2
3.2.1
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
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
After 30 seconds of non-activity, while not tethered to the PC, the camera goes into Standby mode.
3.3
3.3.1
Enabled using the mode button (from ‘Snapshot’ mode, press once).
3.3.2
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
After 5 seconds of non-activity, or after releasing the shutter button, the camera returns to standby mode.
3.4
3.4.1
Enabled using the mode button (from ‘Snapshot’ mode, press twice).
3.4.2
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
After 5 seconds of non-activity, or after the timer has counted down 10 seconds, the camera returns to standby mode.
3.5
3.5.1
Enabled using the mode button (from ‘Snapshot’ mode, press three times).
15
STV0680F_contents.fm
2.
3. USB connection detected
4. If in USB suspend mode, USB driver re-starts communications with the camera as per USB specification
RS232 receives start bit from host software
‘Snapshot’ mode (in High or Low resolution)
‘Continuous Capture’ mode (in High or Low resolution)
Self-timer Mode (in High or Low resolution)
‘Clear camera’
Entering this mode
Description
Exiting this mode
Entering this mode
Description
Exiting this mode
Entering this mode
Description
Exiting this mode
Entering this mode
Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
Commercial in confidence
(only if no USB detected
CDSTV0680F-C
PRELIMINARY
)