9/35

STV0674

STV0674 Application Examples

3

STV0674 Application Examples

The initial STV0674 released by ST Microelectronics is supplied with generic firmware application

code to realise one of the following camera types.

3.1

Webcam with audio

3.1.1

Overview

This camera uses the minimum of external components and has no user interface, batteries or

memory for image storage. It is used as a tethered video capture camera over USB, with

simultaneous audio and video. It is controlled entirely through PC drivers. The application specific

firmware is downloaded from the PC.

Note:

A custom USB PID/VID can be configured by the use of an EEPROM, if required.

3.1.2

Application diagram

Figure 1: Application diagram when using STV0674 as webcam with audio

CMOS Sensor

CIF or VGA

lens + IR filter

USB

interface

processor

embedded

memory

to host PC

video

processor

video

compression

micro

(not for image store)

audio

interface

USB Cable

STV0674

Audio

pre-amp

microphone

memory

interface

external

EEPROM

image

array