STV-DCA/CIF-E01 STMICROELECTRONICS [STMicroelectronics], STV-DCA/CIF-E01 Datasheet - Page 6

• Manufacturer Part Number: STV-DCA/CIF-E01
• Description: DUAL-MODE DIGITAL CAMERA CHIPSET
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Introduction
1
1.1
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Subject
OEM Flashgun
Module
Introduction
Digital camera chipset
This document describes the features and functionality of a CMOS chipset, comprising an
STMicroelectronics (ST) CIF or VGA resolution sensor and an STV0680B companion processor
(DCA1), 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 or
Macintosh for processing is done through an RS232 or USB interface, through demo software, a
TWAIN driver, or OEM custom application. The license to use the colour algorithm (embedded in
the PC or Mac 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.
Using STV0680B-003, the firmware also includes the capability to trigger a flashgun module
through a two wire interface (enable input and trigger output), and the capability to record audio
sounds into the SDRAM, for subsequent upload to the PC, or to replay audio sounds which have
either been recorded on the camera or dowloaded from the PC (stored on the PC as.WAV files).
Precise design guidelines are available from ST as a reference design (see
development kit (SDK) for PC 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 as object code.
Enable/Trigger
IR Filter
Lens +
CMOS Sensor
VV6410/6411(CIF)
VV6500 (VGA)
Pre-Amp
VReg
Image Array
Audio
Figure 1 : Typical camera system block diagram
Speaker
Audio
Microphone
Sensor clock
Buzzer
Sensor data
Piezo
Amplifier
4-5v (Nominal) supply from Battery or USB
3v3 supply
Comparator
Buttons:
/Record”
“Shutter
Push
Version 3.4
“Mode”
12MHz XTAL
Audio DAC
Sensor
GPIO
PWM
I/F
LED
Enable/Trigger
STV0680B
Flashgun
Driver
LCD
memory
Detect Low
RS232
USB
Battery
I/F
I/F
I/F
STV0680B + VV6444/6410/6500
2 x 7 seg. LCD
Circuit (Discretes)
16MBit or 64MBit
Circuit (Discretes)
Management
Transceiver
SDRAM
Power
Section 4
3-4 x AA, AAA, etc.
4.5 - 6v Battery e.g.
to PC
RS232 interface
USB interface
to PC
). A software