VV6501 datasheet(5/60 Pages) STMICROELECTRONICS

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VV6501

Overview

1.2

Typical application

1.2.1

USB webcam

This sensor may be used in conjunction with the STMicroelectronics STV0676 co-processor to

produce a low cost USB webcam.

In this application the co-processor supplies the sensor clock and uses the embedded control

sequences to synchronise with the frame and line level timings. It then performs the colour

processing on the raw image data from the sensor before supplying the final image data to the host

using the USB interface.

The voltage regulators on-board the sensor are used to control external bipolar transistors to derive

the supplies for the sensor and co-processor from the 5V USB supply. This approach eliminates the

requirement for more costly external voltage regulation circuitry.

Figure 2 below illustrates a typical system using VV6501.

The input USB supply is 5 V. The 3V3 digital regulator generates the supply for the sensor digital

part and the co-processor IOs. The 1V8 regulator generates the core supply for the co-processor.

Figure 2: USB camera system using STV0676

USB

Hub

V5V

USB - data

I2C

STV0676

GND

Microphone

video D[4:0]

USB-power

VV6501

3V3

USB Webcam

1V8

suspend

USB

interface

Power management

Digital interface

VGA pixel array

Audio amplifier

Co-processor

Video

processing

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