STV-DCA-VGA-E01 データシートの表示（PDF） - Vision

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STV-DCA-VGA-E01

Low Cost Digital Camera (LCDC) Chipset

Vision 

STV0680A + VV6444/6410/6500

PRELIMINARY

Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000

1. 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 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.

Low cost lens

Push buttons:

Mode

Shutter

Optional

LED Indicator

O p tio n a l

2 x 7 seg. LCD

CMOS Sensor:

VV6444/6410

(CIF)

VV6500

(VGA)

Sensor data

Sensor clock

O ptional

Piezo

Buzzer

M in i

speaker

Buffer Amp

GPIO

LCD memory

Driver I/F

16MBit or 64MBit

SDRAM

Sensor

I/F

PWM

Audio I/F

RS232

I/F

STV0680A

USB

I/F

Detect Low

Battery

Transceiver

C irc u it

Power

Management

C irc u it

12M Hz XTAL

3v3 supply (STV0680A)

Switched sensor supply (5V for VV6444, 3v3 for VV6410/6500)

RS232 interface

to PC

USB interface

to PC

6-9V Battery e.g., PP3,

4-6 x AA, AAA, etc

Figure 1 : Typical camera system block diagram

1.2 Co-processor choices

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.:

Co-

processor

Sensors

supported

SDRAM

supported

USB

interface

RS232

interface

Video for

Windows

support

STV0680-001

VV6444

16Mbit only

Yes

STV0680A-002 VV6444/6410/6500 16Mbit or 64Mbit

Yes

Table 1 : Product choices

No

No

Yes

Yes

7

STV0680F_contents.fm

CDSTV0680F-C

Commercial in confidence

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