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參數(shù)資料
| 型號： | OV6620 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | SINGLE-CHIP CMOS CIF COLOR DIGITAL CAMERA |
| 中文描述： | 單芯片CMOS到岸價格彩色數(shù)碼攝像機 |
| 文件頁數(shù)： | 26/31頁 |
| 文件大小： | 341K |
| 代理商： | OV6620 |
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OV6620/OV6120
26
Version 1.11
14 May 1999
SINGLE IC CMOS COLOR AND B/W DIGITAL CAMERAS
O
MNI
V
ISION
T
ECHNOLOGIES
, Inc.
Advanc ed Information
Preliminary
0C
AWB - Blue
20
R/W
White Balance Background: Blue Channel
ABLU[7:6] - rsvd
ABLU[5] - Sign bit.
“0” - decrease background blue component
“1” - increase background blue component
ABLU[4:0] - White balance blue ratio adjustment
White Balance Background: Red Channel
ARED[7:6] - rsvd
ARED[5] - Sign bit.
“0” - decrease background red component
“1” - increase background red component
ABLU[4:0] - White balance red ratio adjustment
Common Control R
COMR[7] - Analog signal 2x gain control bit. “1” - Additional 2x gain, “0” - normal
COMR[6:0] - Reserved
Common Control S
COMS[7:6] - Reserved
COMS[5:4] - Black expanding level
“00” - 1.2V, “01” - 1.26V, “10” - 1.3V, “11” - 1.4V
COMS[3:2] - Set high threshold level
“00” - 1.9V, “01” - 2.0V, “10” - 2.1V, “11” - 2.2V
COMS[1:0] - Set low threshold level
“00” - 1.3V, “01” - 1.45V, “10” - 1.5V, “11” - 1.6V
Automatic Exposure Control
AEC[7:0] - Set exposure time
Interlaced: T
ex
= T
line
x AEC[7:0]
Progressive: T
ex
= T
line
x AEC[7:0] x 2
Clock Rate Control
CLKRC[7:5] – Sync output polarity selection
“00” - HSYNC=Neg, CHSYNC=Neg, VSYNC=Pos
“01” - HSYNC=Neg, CHSYNC=Neg, VSYNC=Neg
“10” - HSYNC=Pos, CHSYNC=Neg, VSYNC=Pos
“11” - HSYNC=Pos, CHSYNC=Pos, VSYNC=Pos
CLKRC[5:0] – Clock prescaler
CLK = (CLK_main / ((CLKRC[5:0] + 1) x 2)) / 2
Common Control A
COMA[7] - SRST, “1” 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, “1” selects mirror image
COMA[5] - VSFR, “1” enables AGC,
COMA[4] - Digital output format, “1” selects 8-bit: Y U Y V Y U Y V
COMA[3] - Select video data output: “1” - select RGB, “0” - select YCrCb
COMA[2] - Auto White Balance “1” - Enable AWB, “0” - Disable AWB
COMA[1] - Color Bar Test Pattern: “1” - Enable color bar test pattern
COMA[0] - reserved
Common Control B
COMB[7] - reserved
COMB[6] - reserved
COMB[5] - Select data format. “1” - Select 8-bit format, Y/CrCb and RGB is multiplexed to 8-bit
Y bus, UV bus is tri-stated, “0” - Select 16-bit format
COMB[4] - “1” - enable digital output in CCIR656 format
COMB[3] - CHSYNC output: “1” - Horizontal sync, “0” - composite sync
COMB[2] - “1” - Tristate Y and UV busses. “0” - enable both busses
COMB[1] - “1” - Initiate single frame transfer
COMB[0] - “1” - 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
0D
AWB - Red
20
R/W
0E
COMR
0D
RW
0F
COMS
05
RW
10
AEC
9A
R
11
CLKRC
00
R
12
COMA
24
RW
13
COMB
01
RW
14
COMC
00
RW
Subad-
dress
(hex)
Register
Default
(hex)
Read/
Write
Descriptions
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