STV-DCA/VGA-E01 STMICROELECTRONICS [STMicroelectronics], STV-DCA/VGA-E01 Datasheet - Page 7

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

STV0680A + VV6444/6410/6500
1.
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.
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.
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.
The firmware variant of STV0680 denoted by STV0680-001 does not support RS232 interface.:
7
STV0680F_contents.fm
STV0680A-002
STV0680-001
Introduction
processor
Digital camera chipset
Co-processor choices
Co-
CMOS Sensor:
VV6444/6410
Low cost lens
VV6500
(VGA)
(CIF)
VV6444/6410/6500
supported
Sensors
VV6444
Figure 1 : Typical camera system block diagram
Sensor data
speaker
Switched sensor supply (5V for V V6444, 3v3 for VV 6410/6500)
O ptional
Sensor clock
M ini
Buzzer
Piezo
Push buttons:
Shutter
Buffer A m p
M ode
Table 1 : Product choices
Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
16Mbit or 64Mbit
Commercial in confidence
supported
16Mbit only
SDRAM
12M Hz XTA L
A udio I/F
Sensor
CDSTV0680F-C
PRELIMINARY
PW M
G PIO
I/F
LED Indicator
STV0680A
Optional
D river
LCD
3v3 supply (S TV0680A)
m em ory
Detect Low
R S232
interface
USB
Battery
I/F
I/F
I/F
USB
Yes
Yes
2 x 7 seg. LCD
16M Bit or 64M Bit
O ptional
M anagem ent
Transceiver
SDRAM
C ircuit
P ower
C ircuit
interface
RS232
Yes
No
6-9V Battery e.g., PP 3,
4-6 x AA, A AA, etc
to PC
RS232 interface
USB interface
to PC
Windows
Video for
support
Yes
No