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參數(shù)資料
| 型號(hào)： | OV7930 |
| 英文描述： | MCU CMOS 20LD 1K EPRM, -40C to +85C, 20-SSOP 208mil, TUBE |
| 中文描述： | 顏色| NTSC制式| 510 × 492 |模擬|的CameraChip |
| 文件頁(yè)數(shù)： | 3/18頁(yè) |
| 文件大?。?/td> | 564K |
| 代理商： | OV7930 |
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Functional Description
Version 1.1, January 15, 2003
Proprietary to OmniVision Technologies
3
O
mni
ision
These two functions can be controlled separately using
SCCB register bit COME[6] (see
“COME” on page 12
) for
the mirror function and register bit COMJ[0] (see
“COMJ”
on page 13
) for the vertical flip function.
Multi-Chip Synchronize
The OV7930 C
AMERA
C
HIP
provides the multi-chip
Synchronize function where one chip works as the master
and all others as slave devices. The master chip provides
the frame synchronize signal through the FODD pin (pin
23 - see
“FODD/HGAIN” on page 5
). All slave devices
accept the frame synchronize signal through the FSI pin
(pin 20 - see
“FSI” on page 4
). This mode allows all
devices to synchronize together.
Chip Configuration
The OV7930 C
AMERA
C
HIP
has been designed for
ease-of-use in many stand-alone applications. Most of the
on-chip functions are configurable by connecting the
appropriate pins high (logic "1") or low (logic "0") through
a 10 K
resistor. The C
AMERA
C
HIP
reads the input pins at
power
up
which
enable
configurations.
user-defined
default
The OV7930 C
AMERA
C
HIP
also has a SCCB slave
interface for programmable access to all registers
functions. Refer to
OmniVision Technologies Serial
Camera Control Bus (SCCB) Specification
for detailed
usage of the serial control port.
NOTE
Once the SCCB interface is enabled (pin 14 -
see
“SCCB_E” on page 4
), the following pin
assignment functions will be ignored and
functions will be defined by the related SCCB
register. These pins are:
ABRT (pin 3)
BKLT (pin 4)
VFLIP (pin 15)
GAMMA (pin 21)
MIR (pin 22)
HGAIN (pin 23)
FASTB (pin 25)
Additional Picture Controls
The OV7930 C
AMERA
C
HIP
provides additional picture
control functions to enhance image quality and chip
performance.
Automatic Gain Control (AGC)
The default gain range is 1x - 8x while the user can set the
gain range up to 4x or 16x.
Brightness Control
Brightness can be controlled either by internal automatic
algorithms or by the user through the following SCCB
register bits:
BRT[7:0] (see
“BRT” on page 11
)
Gamma Correction
The OV7930 has luminance and chrominance Gamma
correction through the GAMMA pin (pin 21 - see
“GAMMA” on page 4
).
Backlight Control
The OV7930 manages backlight conditions through
register bit COME[4] (see
“COME” on page 12
).
Color Saturation
Color saturation can be updated manually through the
SCCB register bits SAT[7:4] (see
“SAT” on page 11
).
Hue Adjustment
Image hue can be adjusted through the SCCB register bits
HUE[5:0] (see
“HUE” on page 11
).
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