STV-DCA/VGA-E01 STMICROELECTRONICS [STMicroelectronics], STV-DCA/VGA-E01 Datasheet - Page 14

• 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
Note: In STV0680-001, pressing the Mode button while in ‘Clear Camera’ mode only moves onto ‘Change resolution’ mode if the
camera has no images stored. This is because in STV0680-001, mixed resolutions (i.e. ‘High’ and ‘Low’) cannot be stored at the
same time. In STV0680A-002, mixed resolutions can be stored at the same time.
3.
The above modes are interrupted by the detection of a USB or RS232 connection. This is to allow for the possibility that the PC
driver takes control of the chipset (e.g. when starting a VfW application through USB).
3.1
3.1.1
The camera enters standby mode automatically after 30 seconds of inactivity if not tethered to USB, or when USB suspend mode
is activated by the PC driver.
3.1.2
This allows image data to be stored in memory with extremely low power consumption, which appears to the user as if the
camera is switched ‘off’, since there is no LCD display or LED lit. In VV6444-based designs, STV0680A powers off the sensor
completely, in VV6410/6500 based designs, the sensor is placed in suspend mode, and the camera enters a mode where only
SDRAM refresh is carried out. The shutter button is inactive in standby mode.
3.1.3
Wake-up from standby mode is achieved by any of the following means:
STV0680F_contents.fm
’Snapshot’
resolution’
1. Pressing the ‘mode’ button (only if no USB detected)
Self timer
Continu-
ous cap-
’Change
Standby
camera’
Mode
’Clear
mode
mode
ture
Camera modes of operation
Standby mode (or USB suspend mode)
Entering this mode
Description
Exiting this mode
Takes one picture after a 10 second count-
Prompts user to
pressed, regardless of light available, then
Takes one picture, if sufficient light availa-
No function - pictures cannot be taken in
Takes a picture every 80mS while button
If shutter button pressed while in
clear camera
Changes resolution (i.e. Low to High, or
High to Low) and returns to ‘Snapshot’
(1st press:)
down, if sufficient light available, then
ble, then returns to ‘Snapshot’ mode
returns to ‘Snapshot’ mode
returns to ‘Snapshot’ mode
standby mode
this mode
mode
(2nd press:) Clears all
images stored in cam-
era , then returns to
‘Snapshot’ mode
Table 6 : Camera modes
Commercial in confidence
CDSTV0680F-C
PRELIMINARY
Moves to continuous cap-
Moves to ‘Change resolu-
Moves to self timer mode
pressed while in this
Moves to ‘Clear camera’
Wakes up camera into
Returns to ‘Snapshot’
tion’ mode (see note)
If mode button
‘Snapshot’ mode
ture mode
mode
mode
mode
STV0680A + VV6444/6410/6500
30 seconds then
‘Snapshot’ mode
after 5 seconds
Stays in ‘Snap-
If no further
standby mode
shot’ mode for
standby mode
Remains in
Returns to
moves to
action
Number of pic-
tures still avail-
Number of pic-
tures still avail-
If currently in
If currently in
Low Resolu-
High resolu-
able to take
able to take
(Display is
displays
tion: “Hr”
tion: “Lr”
blank)
LCD
“CL”
“St”
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