STV0680 datasheet(6/63 Pages) STMICROELECTRONICS

6 / 63 page

Introduction

STV0680B + VV6444/6410/6500

6/63

Version 3.4

Introduction

1.1

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

Section 4). A software

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.

Figure 1 : Typical camera system block diagram

CMOS Sensor

Sensor data

STV0680B

USB interface

16MBit or 64MBit

SDRAM

Lens +

RS232

I/F

USB

I/F

memory

I/F

RS232 interface

GPIO

Sensor

I/F

PWM

LED

4.5 - 6v Battery e.g.

12MHz XTAL

Audio DAC

LCD

Driver

2 x 7 seg. LCD

Push

Transceiver

Piezo

“Mode”

Buzzer

“Shutter

4-5v (Nominal) supply from Battery or USB

3-4 x AA, AAA, etc.

Power

Management

Circuit (Discretes)

Detect Low

Battery

to PC

Circuit (Discretes)

Sensor clock

IR Filter

VV6500 (VGA)

VV6410/6411(CIF)

Image Array

Audio

Pre-Amp

Speaker

Microphone

Comparator

Buttons:

/Record”

OEM Flashgun

Enable/Trigger

Module

Audio

Enable/Trigger

Flashgun

Amplifier

VReg

3v3 supply

Subject

STV0680 数据表(PDF) 6 Page - STMicroelectronics

STV0680 数据表(HTML) 6 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63

数据表下载