STV-DCA/VGA-E01 STMICROELECTRONICS [STMicroelectronics], STV-DCA/VGA-E01 Datasheet - Page 16

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

Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
3.5.2
The LCD displays “CL”. Pressing shutter button twice will clear all the images in the camera.
3.5.3
After 5 seconds of non-activity, or after the camera has been cleared, the camera returns to standby mode.
3.6
3.6.1
This is enabled using the mode button (from ‘Snapshot’ mode, press four times).
Note: In STV0680-001, the images stored in memory must be cleared before this mode can be entered. This is because in
STV0680-001, mixed resolutions (i.e. ‘High’ and ‘Low’) cannot be stored at the same time.
3.6.2
The LCD displays the target resolution to which the camera can be changed, i.e. if in High resolution “Lr” (Low resolution) is
displayed, if in Low resolution, “Hr” (High resolution) is displayed. ‘High’ resolution stores the full image resolution from the sensor
array, while ‘Low’ subsamples the sensor array, to store 4x the number of images (e.g. 80 in QCIF mode, compared to 20 in CIF
mode).
Dependant on the type of sensor used, different resolutions are obtained, see Table 4 or Table 5. By pressing the shutter button,
user changes the resolution.
3.6.3
After 5 seconds of non-activity, or after the resolution has been changed, the camera returns to standby mode.
3.7
3.7.1
This is activated by the PC Video for Windows driver while the camera is tethered, dependant on whether VfW is supported (see
Table 3).
3.7.2
The camera is controlled by the PC driver.
Note: Any images or continuous image sequences contained in the camera are lost when the video for Windows driver starts.
3.7.3
This is controlled by the PC drivers.
3.8
3.8.1
This is not truly a mode of operation, but a description of what happens if:
Note: normally a camera with USB interface should source power from the USB connection, but this is hardware dependant, see
Section 9.
3.8.2
In this situation, all image data is lost.
Note: under certain circumstances, the image data may be maintained if the camera or PC is powered on again after a few
STV0680F_contents.fm
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The battery power and USB connection are removed from the camera
The battery power is removed, and the PC to which the camera is tethered, is switched off.
The battery voltage falls extremely low. Ways of avoiding this situation are discussed in the reference design, see Section 9.
‘Change resolution’
Tethered USB Video mode
Powering the camera off
Description
Exiting this mode
Entering this mode
Description
Exiting this mode
Entering this mode
Description
Exiting this mode
Entering this mode
Description
Commercial in confidence
CDSTV0680F-C
PRELIMINARY
STV0680A + VV6444/6410/6500
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