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VV6444 数据表(PDF) 9 Page - STMicroelectronics

部件名 VV6444
功能描述  Low Cost Digital Camera (LCDC) Chipset
PDF  60 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

VV6444 数据表(HTML) 9 Page - STMicroelectronics

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STV0680A + VV6444/6410/6500
Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
PRELIMINARY
CDSTV0680F-C
Commercial in confidence
9
STV0680F_contents.fm
•
AVI video file creation from image sequences captured in ‘continuous’ mode
Custom OEM software can be developed by using the SDK (for SDK availability, contact ST), to upload thumbnails/still images or
‘continuous’ images, e.g. for AVI file creation.
1.4.5
Power management features and USB compliance
•
Picture retention with extremely low power operation, which appears to the user as if the camera is “switched off”.
•
Auto power-off after 30sec with no user activity
•
Operates from 6-9V battery, although system voltage is 5V or 3.3V, dependant on sensor.
•
Low battery detection
•
Dependant on hardware configuration, switch-over to USB power supply is supported, to allow the device to operate with low
batteries or without batteries, when connected to USB.
•
Full USB compliance requirements are listed in the USB specification, however, in a camera designed using this chipset, the
following must at least be included: (a) an SDRAM with sufficiently low self-refresh current, (b) USB inrush protection circuitry,
and (c) (in the case of VV6444 only) a switched 5V sensor supply is used, to maintain sufficient supply voltage to the 5V
sensor. See Section 9. for further details.
1.4.6
General features
•
High speed picture download over USB
•
ST Colour processing algorithms available under license (as part of drivers/SDK)
•
USB or RS232 serial interface options, and VfW / TWAIN driver support.
•
Customisation of STV0680A is possible to vary the features described in this document, subject to commercial agreement
with ST, see Section 6.
Interface type:
PC Operating system:
RS232
Win9x, WinNT4, Win2k
USB
Win98 and Win2k only
STV680-001
Not available
TWAIN
STV0680A-002
TWAIN
TWAIN, VfW
Table 3 : Driver choices



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