參數(shù)資料
型號： VV6444C001
廠商： 意法半導(dǎo)體
英文描述： Low Cost Digital Camera (LCDC) Chipset
中文描述： 低成本數(shù)碼相機(jī)（LCDC）芯片組
文件頁數(shù)： 7/60頁
文件大?。?/td> 352K
代理商： VV6444C001
STV0680A + VV6444/6410/6500
Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
PRELIMINARY
CDSTV0680F-C
Commercial in confidence
7
T
STV0680F_contents.fm
1.
Introduction
1.1
This document describes the features and functionality of a CMOS chipset, comprising an STMicroelectronics (ST) CIF or VGA
resolution sensor and an STV0680A companion processor (formerly known as DCA1: Digital Camera ASIC 1), as well as
outlining what peripheral components are required/supported in order to complete a camera using the chipset. Such a camera is
particularly suited to dual-mode digital stills or toy applications.
Digital camera chipset
In stills mode, the camera stores raw image data in memory. The camera carries out no colour processing, ensuring its simplicity
and low cost. Subsequent download of raw data to a PC for processing is done through an RS232 (not STV0680-001) or USB
interface, through demo software, a TWAIN driver, or OEM custom application. The license to use the colour algorithm
(embedded in the PC driver software) is included in the price of the chipset.
A video option is provided, when tethered through USB, which can allow for Video for Windows applications, and ‘video clips’ can
be recorded while untethered by continuously capturing images while in ‘Continuous’ mode, then downloaded to the PC for
playback, using software to create an AVI file.
Precise design guidelines are available from ST as a reference design (see Section 9.) A PC software development kit (SDK) is
available from ST, to interface to the camera and provide the basis for developing a custom software application for stills and/or
video, which includes colour processing software.
Figure 1 : Typical camera system block diagram
1.2
The following co-processor choices are available. The STV0680A supercedes STV0680, and uses different silicon and different
firmware compared to STV0680. Functionally it is exactly the same as STV0680 except that it supports a VfW driver. In addition,
a new firmware variant means that the STV0680A also supports VV6410 and VV6500 sensors, as well as 64Mbit memory size.
Co-processor choices
The firmware variant of STV0680 denoted by STV0680-001 does not support RS232 interface.:
Co-
processor
Sensors
supported
SDRAM
supported
USB
interface
RS232
interface
Video for
Windows
support
STV0680-001
VV6444
16Mbit only
Yes
No
No
STV0680A-002
VV6444/6410/6500
16Mbit or 64Mbit
Yes
Yes
Yes
Table 1 : Product choices
CMOS Sensor:
VV6444/6410
(CIF)
VV6500
(VGA)
Sensor data
STV0680A
USB interface
to PC
16MBit or 64MBit
SDRAM
RS232
I/F
USB
I/F
memory
I/F
RS232 interface
to PC
GPIO
Sensor
I/F
PWM
LED Indicator
6-9V Battery e.g., PP3,
4-6 x AA, AAA, etc
12MHz XTAL
Audio I/F
Mini
speaker
LCD
Driver
2 x 7 seg. LCD
Push buttons:
Buffer Amp
Transceiver
Circuit
Low cost lens
Piezo
Buzzer
Mode
Optional
Optional
Optional
Shutter
3v3 supply (STV0680A)
Switched sensor supply (5V for VV6444, 3v3 for VV6410/6500)
Power
Management
Circuit
Detect Low
Battery
Sensor clock
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