OV7411 查看數據表（PDF） - Unspecified

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OV7411

OV7910P SINGLE-CHIP CMOS COLOR PAL CAMERA , OV7410P/OV7411P SINGLE-CHIP CMOS B&W PAL CAMERA

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OMNIVISION TECHNOLOGIES, Inc.

Preliminary

OV7910P/OV7410P/OV7411P

SINGLE IC CMOS COLOR & B/W PAL ANALOG CAMERAS

1. Functional Description

(Note: All references to color functions apply only to OV7910P image sensor)

1.1 Video Standards

Two TV standards are implemented and available as

output in the OV7910P/OV7410P/OV7411P imaging

devices: PAL (B). Table 2 below shows how to config-

ure the standard of choice. Please note

that the accuracy and stability of the crystal clock fre-

quency is important to avoid unwanted color shift in TV/

video systems.

Table 2. Standard Configuration

Standard

PAL

PAL

(pin 24)

1

Clock

17.734475 MHz

Comments

clock in = 4 x Fsc

1.2 Video Formats

The OV7910P/OV7410P/OV7411P image sensors

support a variety of formats including Composite

(CVBS), S-Video (YO/CO), RGB components, YUV

components, and B/W. Composite and S-Video signals

are generated from the internal TV encoder and the

RGB/YUV/BW outputs are generated from the color

matrix prior to entering the encoder.

The image sensor utilizes the RG/BG Bayer pattern

sending raw pixel data through the color matrix, creat-

ing RGB or YUV component signals. At the same time,

YUV signals are also processed to generate both com-

posite and S-Video signals. (Note: Color format config-

uration is valid only for the OV7910P image sensor)

1.2.1 Composite and S-Video

The Composite/S-Video format is the power-up default

configuration for the OV7910P/OV7410P/OV7411P

image sensors. Pins AMOD0/AMOD1 (pins 38 and 39)

select composite and S-Video formats. In this configu-

ration, RVCVO (pin 17) outputs CVBS, GYYO (pin 16)

outputs

the YO component of the S-Video signal, and BUCO

(pin 15) outputs the CO component. Table 3 below

summarizes the formats available and the settings

required on the appropriate pins.

1.2.2 RGB

Setting AMOD0 = 1 (w/AMOD1 = x) selects the RGB

format. In this configuration, RVCVO outputs the

1.2.3 YUV

Setting AMOD0=0 and AMOD1=1 configures the

OV7910P/OV7410P/OV7411P sensors to operate in

YUV or B/W mode. In this configuration, GYYO outputs

the Y component, RVCVO provides the Cr component,

Red component, GYYO outputs the Green component,

and BUCO provides the Blue component.

and BUCO outputs the Cb component. On the

OV7410P image sensor, only the GYYO (Y compo-

nent) output is valid.

December 7, 1999

Version 1.4

5

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