OV9625 Datasheet, PDF (4/30 Pages) List of Unclassifed Manufacturers – OV9625 Color CMOS SXGA (1.3 MPixel) CAMERACHIP OV9121 B&W CMOS SXGA (1.3 MPixel) CAMERACHIP

OV9625/OV9121 CMOS SXGA (1.3 MPixel) CAMERACHIP™
Omni ision
Sub-sampling Mode
Default resolution for the OV9625/OV9121 is 1280 x 1024
pixels, with all active pixels being output (see Figure 5).
The OV9625/OV9121 can be programmed to output in
640 x 480 (VGA) sized images for applications where
higher resolution image capture is not required.
Figure 5 Pixel Array
Column #
i i+1 i+2 i+3 i+4 i+5 i+6 i+7 i+8 i+9
n B G B GB G B G B G
n+1 G R G R G R G R G R
n+2 B G B G B G B G B G
n+3 _{G R G R G R G R G R}
Row #
n+4 _{B G B G B G B G B G}
n+5 G R G R G R G R G R
n+6 B G B G B G B G B G
n+7 G R G R G R G R G R
For VGA resolution, the following sub-sampling method is
available:
Progressive Sub-sampling
The entire array is sub-sampled for maximal image
quality. Both horizontal and vertical pixels are
sub-sampled to an aspect ration of 4:2 as illustrated in
Figure 6.
Figure 6 Sub-Sampling Mode
Column
Row n B G
n+1 G R
n+2
n+3
n+4 B G
n+5 G R
n+6
n+7
BG
GR
BG
GR
Skipped Pixels
BG
GR
BG
GR
4
Proprietary to OmniVision Technologies
Slave Operation Mode
The OV9625/OV9121 can be programmed to operate in
slave mode (default is master mode).
When used as a slave device, the OV9625/OV9121
changes the HSYNC and VSYNC outputs to input pins for
use as horizontal and vertical synchronization input
triggers supplied by the master device. The master device
must provide the following signals:
1. System clock MCLK to XCLK1 pin
2. Horizontal sync MHSYNC to CHSYNC pin
3. Vertical frame sync MVSYNC to VSYNC pin
See Figure 7 for slave mode connections and Figure 8 for
detailed timing considerations. In this mode, the clock for
all devices should be the same. Otherwise, the devices
will suffer from flickering at line frequency.
Figure 7 Slave Mode Connection
D[9:0]
CHSYNC
VSYNC
XCLK1
MHSYNC
MVSYNC
MCLK
OV9625
(OV9121)
Master
Device
Figure 8 Slave Mode Timing
VSYNC
T
frame
T_VS
T_line
T_HS
HSYNC
T
clk
MCLK
NOTE:
1) T_HS > 6 T_clk, Tvs > T_line
2) T_line = 1520 x T_clk (SXGA); T_line = 800 x T_clk (VGA)
3) T_frame = 1050 x T_line (SXGA); T_frame = 500 x T_line (VGA)
Channel Average Calculator
OV9625/OV9121 provides average output level data for
the R/G/B channels along with frame-averaged luminance
level. Access to the data is via the serial control port.
Average values are calculated from 128 pixels per line (64
in VGA).
Version 1.3, September 15, 2003