OV6620 Datasheet, PDF(29/31 Page) List of Unclassifed Manufacturers – SINGLE-CHIP CMOS CIF COLOR DIGITAL CAMERA

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OV6620 Datasheet, PDF (29/31 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)

COMF

COMG

COMH

COMI

FRARH

Default

(hex)

Read/

Write

Descriptions

Common Control F

COMF[7:6] - Second aperture correction threshold selection.

[00] - Difference of neighbor pixel luminance is larger than 8 mV, correction on.

[01] - 16 mV.

[10] - 32 mV.

[11] - 64 mV.

COMF[5:4] - Second aperture correction strength selection.

[00] and [01] - Strength is 50% of difference of neighbor pixel luminance.

[10] - 100%.

[11] - 200%.

COMF[3] - UV BLC swap. â1â swap; â0â no swap.

COMF[2] - Digital data MSB/LSB swap. â1â LSB->Bit7, MSB->Bit0; â0â normal.

COMF[1] - â1â A/D Black level calibration enable. â0â Disable A/D BLC.

COMF[0] - â1â Output first 4 line black level before valid data output. HREF number will

increase 4 relatively. â0â no black level output.

Common Control G

COMG[7] - reserved

COMG[6] - reserved.

COMG[5] - Select CKOUT pin output V flag. 1 - CKOUT output V flag signal. CKOUT=1,

means related UV channel output V component (or Red component), CKOUT=0 pointed to

U component (or Blue component). 0 - CKOUT output buffered XCLK2

COMG[4] - reserved.

COMG[3] - reserved

COMG[2] - â1â A/D offset adjustment manually mode enable: 1 - A/D data will be add/substrate

a value defined by register [21] and [22], which content is written by I2C. 0 - A/D data will be

added/substrate a value defined by register [21] and [22], which is updated by internal

circuit.

COMG[1] - Digital output full range selection. OV6620 output data value range is [10] - [F0], if

COMG[1] -1, range change to [01] - [FE] with signal overshoot and undershoot level.

COMG[0] - reserved.

Common Control H

COMH[7]: - â1â selects One-Line RGB raw data output format, â0â selects normal two-line RGB

raw data output, effective only in Progressive Scan mode.

COMH[6]: - â1â enable Black/White mode. When OV6620 working as BW camera, its vertical

resolution will be higher than color mode. At this mode, canât set OV6620 working at 8 bit

output mode. OV6620 output data YUV/RGB from Y port. UV port will be tri-state. COMB[5]

and COMB[4] will be set to â0â. â0â normal color mode.

COMH[5]: - reserved.

COMH[4]: - Freeze AEC/AGC value, effective only when COMB0=1. â1â - register [00] and [10]

will not be updated and hold latest value. â0â - AEC/AGC normal working status.

COMH[3]: - AGC disable. 1 - when COMB[0]=1 and COMA[5]=1, internal circuit will not update

COMB0=1 and COMA[5]=1, register [00] will be updated by internal algorithm.

COMH[2]: - RGB raw data output YG format: 1 - Y channel G, UV channel B R; 0 - Y channel:

G R G R..., UV channel B G B G....

COMH[1]: - Gain control bit. â1â Double PreAmp gain to 12dB. â0â PreAmp gain is 6dB.

COMH[0]: - High gain mode. â1â - AGC maximum gain is 24dB. AGC step is 1/8. â0â AGE

maximum gain is 18dB, AGC step is 1/16. Only effective when COMB[0]=1, COMA[5]=1 and

COMH[3]=0.

Common Control I

COMI[7]: - AEC disable. â1â If COMB[0]=1, AEC stop and register [10] value will be held at last

AEC value and not be updated by internal circuit. â0â - if COMB[0]=1, register [10] value will

be updated by internal circuit

COMI[6]: - Slave mode selection. â1â slave mode, use external Sync and Vsync; â0â master

mode

COMI[5]: - reserved

COMI[4]: - reserved

COMI[3]: - Central 1/4 image area rather whole image used to calculate AEC/AGC. â0â use

whole image area to calculate AEC/AGC.

COMI[2]: - reserved

COMI[1:0] - Version flag. For Version A, value is [00], these two bits can only be read.

Frame Rate Adjust High

FRARH[7] - Frame Rate adjustment enable bit. â1â Enable.

FRARH[6] - reserved

FRARH[5] - Highest 1bit of frame rate adjust control byte. see explanation below.

FRARH[4] - reserved

FRARH[3] - Y channel brightness adjustment enable. When COMF[2]=1 active.

FRARH[2] - reserved

FRARH[1] - â1â When in Frame exposure mode, only One frame data output.

FRARH[0] - reserved

14 May 1999

Version 1.11

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