OV2610

Manufacturer Part NumberOV2610
DescriptionColor CMOS UXGA (2.0 MPixel) Camera Chip
ManufacturerOmniVision Technologies, Inc.
OV2610 datasheet
 


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Frame Rate Timing

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Frame Rate Timing

Default frame timing is illustrated in
Figure
11. Refer to
Table 1
for the actual pixel rate at
different frame rates.
Table 1
Frame and Pixel Rates
Frame Rate (fps)
10
5
PCLK (MHz)
24
12
NOTE: Based on 24 MHz external clock and internal PLL
on, frame rate is adjusted by the main clock divide method.
Frame Rate Adjust
The OV2610 offers three methods for frame rate
adjustment:
Clock prescaler:
By changing the system clock divide ratio, the frame
rate and pixel rate will change together.
Line adjustment:
By adding a dummy pixel timing in each line, the
frame rate can be changed while leaving the pixel
rate as is.
Vertical sync adjustment:
By adding dummy line periods to the vertical sync
period, the frame rate can be altered while the pixel
rate remains the same.
After changing registers
COML
(0x2A) and
to adjust the dummy pixels, it is necessary to write to
register
COMH
(0x12) or
CLKRC
counter. Generally, OmniVision suggests users write to
register
COMH
(0x12) (to change the sensor mode) as the
last one. However, if you want to adjust the cropping
window, it is necessary to write to those registers after
changing register
COMH
(0x12). To use
the counter, it is necessary to generate a pulse on
resolution control register bit COMH[6].
SCCB Interface
The OV2610 provides an on-chip SCCB serial control port
that allows access to all internal registers, for complete
control and monitoring of OV2610 operation. Refer to
OmniVision Technologies Serial Camera Control Bus
(SCCB) Specification
for detailed usage of the serial
control port.
Slave Operation Mode
The OV2610 can be programmed to operate in slave
mode (default is master mode).
4
Proprietary to OmniVision Technologies
AMERA
HIP
Channel Average Calculator
Figure 10
and
The OV2610 provides average output level data for the
R/G/B channels along with frame-averaged luminance
level. Access to the data is provided via the serial control
port. Average values are calculated from 128 pixels per
line (64 pixels per line in SVGA).
2.5
1.25
6
3
Reset
The
RESET
pull-down (weak) resistor in the sensor so the default
status of the
Figure 4 RESET Timing Diagram
RESET
1ms
There are two ways for a sensor reset:
1.
Hardware reset - Pulling the
keeping it high for at least 1 ms. As shown in
Figure
will be most stable after the period shown as 4096
External Clock.
2.
Software reset - Writing 0x80 to register 0x12 (see
“COMH” on page
software reset is used, a reset operation done twice
FRARL
(0x2B)
is recommended to make sure the sensor is stable
and ready to access registers. When performing a
(0x11) to reset the
software reset twice, the second reset should be
initiated after the 4096 External Clock period as
shown in
COMH
to reset
Power Down Mode
The
PWDN
pull-down (weak) resistor in the sensor so the default
status of the
Figure 5 PWDN Timing Diagram
PWDN
Two methods of power-down or standby operation are
available with the OV2610.
Hardware power-down may be selected by pulling
the
PWDN
the OV2610 internal device clock is halted and all
internal counters are reset. The current draw is less
than 10 µA in this standby mode.
O
mni
pin (pin 10) is active high. There is an internal
RESET
pin is low.
4096 External Clock
RESET
pin high and
4, after a reset has been initiated, the sensor
19) for a software reset. If a
Figure
4.
pin (pin 7) is active high. There is an internal
PWDN
pin is low.
Sensor Power Down
pin high (+3.3VDC). When this occurs,
Version 1.4, September 15, 2003
ision