OV6620 Datasheet, PDF(26/31 Page) List of Unclassifed Manufacturers – SINGLE-CHIP CMOS CIF COLOR DIGITAL CAMERA

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OV6620 Datasheet, PDF (26/31 Pages) List of Unclassifed Manufacturers – SINGLE-CHIP CMOS CIF COLOR DIGITAL CAMERA

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OMNIVISION TECHNOLOGIES, Inc.

Advanced Information

Preliminary

OV6620/OV6120

SINGLE IC CMOS COLOR AND B/W DIGITAL CAMERAS

Subad-

dress

(hex)

AWB - Blue

AWB - Red

COMR

COMS

AEC

CLKRC

COMA

COMB

COMC

Default

(hex)

Read/

Write

Descriptions

White Balance Background: Blue Channel

ABLU[7:6] - rsvd

R/W

ABLU[5] - Sign bit.

â0â - decrease background blue component

â1â - increase background blue component

ABLU[4:0] - White balance blue ratio adjustment

White Balance Background: Red Channel

ARED[7:6] - rsvd

R/W

ARED[5] - Sign bit.

â0â - decrease background red component

â1â - increase background red component

ABLU[4:0] - White balance red ratio adjustment

Common Control R

COMR[7] - Analog signal 2x gain control bit. â1â - Additional 2x gain, â0â - normal

COMR[6:0] - Reserved

Common Control S

COMS[7:6] - Reserved

COMS[5:4] - Black expanding level

â00â - 1.2V, â01â - 1.26V, â10â - 1.3V, â11â - 1.4V

COMS[3:2] - Set high threshold level

â00â - 1.9V, â01â - 2.0V, â10â - 2.1V, â11â - 2.2V

COMS[1:0] - Set low threshold level

â00â - 1.3V, â01â - 1.45V, â10â - 1.5V, â11â - 1.6V

Automatic Exposure Control

AEC[7:0] - Set exposure time

Interlaced: Tex = Tline x AEC[7:0]

Progressive: Tex = Tline x AEC[7:0] x 2

Clock Rate Control

CLKRC[7:5] â Sync output polarity selection

â00â - HSYNC=Neg, CHSYNC=Neg, VSYNC=Pos

â01â - HSYNC=Neg, CHSYNC=Neg, VSYNC=Neg

â10â - HSYNC=Pos, CHSYNC=Neg, VSYNC=Pos

â11â - HSYNC=Pos, CHSYNC=Pos, VSYNC=Pos

CLKRC[5:0] â Clock prescaler

CLK = (CLK_main / ((CLKRC[5:0] + 1) x 2)) / 2

Common Control A

COMA[7] - SRST, â1â initiates soft reset. Initiate soft reset. All registers are set to default val-

ues and chip is reset to known state and resumes normal operation. This bit is automatically

cleared after reset.

COMA[6] - MIRR, â1â selects mirror image

COMA[5] - VSFR, â1â enables AGC,

COMA[4] - Digital output format, â1â selects 8-bit: Y U Y V Y U Y V

COMA[3] - Select video data output: â1â - select RGB, â0â - select YCrCb

COMA[2] - Auto White Balance â1â - Enable AWB, â0â - Disable AWB

COMA[1] - Color Bar Test Pattern: â1â - Enable color bar test pattern

COMA[0] - reserved

Common Control B

COMB[7] - reserved

COMB[6] - reserved

COMB[5] - Select data format. â1â - Select 8-bit format, Y/CrCb and RGB is multiplexed to 8-bit

Y bus, UV bus is tri-stated, â0â - Select 16-bit format

COMB[4] - â1â - enable digital output in CCIR656 format

COMB[3] - CHSYNC output: â1â - Horizontal sync, â0â - composite sync

COMB[2] - â1â - Tristate Y and UV busses. â0â - enable both busses

COMB[1] - â1â - Initiate single frame transfer

COMB[0] - â1â - Enable auto adjust mode

Common Control C

COMC[7] - reserved

COMC[6] - reserved

COMC[5] - QCIF digital output format selection. 1 - 176x144; 0 - 352x288.

COMC[4] - Field/Frame vertical sync output in VSYNC port selection: 1 - frame sync, only

ODD field vertical sync; 0 - field vertical sync, effect in Interlaced mode

COMC[3] - HREF polarity selection: 0 - HREF positive effective, 1 - HREF negative.

COMC[2] - gamma selection: 1 - RGB Gamma on ; 0 - gamma is 1.

COMC[1] - reserved

COMC[0] - reserved

Version 1.11

14 May 1999

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