ZC0301 Просмотр технического описания (PDF) - Unspecified

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ZC0301

VGA & CIF USB PC Camera Controller

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2. Architecture

ZC0301

VGA & CIF USB PC Camera Controller

CMOS

image

sensor

ISP

Sub-

sample &

Raster

JPEG

Encoder

USB

Device

Controller

PC

host

System Controller

ZC0301

Figure 2 ZC0301 Functional Block Diagram

The ZC0301 consists of five major function blocks, System Controller, Image Signal Processor, Sub-Sample & Raster,

JPEG Encoder, and USB Device Controller, as illustrated in Figure 1. These blocks provide the following functions.

2.1. System Controller

• Providing the control to ISP, JPEG, and USB blocks

• Configuring the control registers

• Chip clock generation

• Error control for the data block through USB interface

2.2. Image Signal Processor

• Dedicated sensor control and signal processing module.

• Serial-Bus interface for CMOS Image Sensor

• 8 bit Bayer format image input

• 3x3 Interpolation

• Color Correction

• Gamma Correction

• Automatic Exposure Control

• Automatic White Balance Control

• Programmable AE windows

• Automatic Reset Level Control

• RGB to YCrCb Color Space Convert

• Histogram Equalization Logic

2.3. Sub-Sample & Raster

• The input data format is 4:4:4 for Y component, Cb component and Cr component. The three components for a

pixel are input simultaneously.

5

Mar. 2002

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