VX6854LC datasheet(13/114 Pages) STMICROELECTRONICS

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VX6854LC

Overview

1.1

VX6854LC use in system with hardware co-processor

The VX6854LC is an image sensor and it can be paired with the STMicroelectronics

STV0987 companion processor. The coprocessor and the sensor together form a complete

imaging system.

Figure 2 below illustrates a typical system using VX6854LC and STV0987.

Figure 2. VX6854LC in system with processor

The sensor main function is to convert the viewed scene into a data stream. The companion

processor function is to manage the sensor so that it can produce the best possible pictures

and to process the data stream into a form which is easily handled by up stream mobile

baseband or MMP (multi-media processor) chipsets.

The sensor supplies high speed clock signal to the processor and provides the embedded

control sequences which allow the co processor to synchronize with the frame and line level

timings. The processor then performs the color processing on the raw image data from the

sensor before supplying the final image data to the host.

With the coprocessor system the clock is sent by host to both the VX6854LC and the

coprocessor. The high-speed clock for the coprocessor is supplied from the VX6854LC. It is

generated using the VX6854LC PLL and is provided as the continuous data qualification

clock.

VX6854LC

CCP 2.0 Rx

Input Data I/F

Output coder

MUX

Bayer

Recon-

struction

Scaler

Color

Engine

Color

Engine

House

CCI

Master

CCI

Slave

Keeper

STV0987

Mobile BaseBand

XSHUT

DOWN

CCI

XSHUT

DOWN

CCI

CCP

imaging

CCI

CCP2 TX

Pixel array and

processes

EXTCLK

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