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PDF ICM202B Data sheet ( Hoja de datos )
| Número de pieza | ICM202B | |
| Descripción | CIF/QCIF CMOS image sensor | |
| Fabricantes | IC Media | |
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ICM202B CIF/QCIF CMOS sensor with digital YUV output
Data Sheet V2.0, February 2003
ICM202B
CIF/QCIF CMOS image sensor with
digital YUV output
Data Sheet
V2.0
IC Media Corporation
www.DataSheet4U.com
545 East Brokaw Road
San Jose, CA 95112, U.S.A.
Phone: (408) 451-8838
Fax: (408) 451-8839
Email: [email protected]
Web Site: www.ic-media.com
IC Media Technology Corporation
6F, No. 61, ChowTze Street., NeiHu District
Taipei, Taiwan, R.O.C.
Phone: 886-2-2657-7898
Fax: 886-2-2657-8751
Email: [email protected]
Web Site: www.ic-media.com.tw
Important notice: This document contains information of a new product. IC Media
technology Inc reserves the right to make any changes without further notice to any
product herein to improve design, function or quality and reliability. No responsibility
is assumed by IC Media Technology for its use, nor for any infringements of patents of
third parties which may result from its use.
©2000, 2001,2002, 2003 IC Media Corporation & IC Me1dia Technology Corp
web site: http://www.ic-media.com/
web site: http://www.ic-media.com.tw/
page 1
2/5/2003
Confidential
1 page  
ICM202B CIF/QCIF CMOS sensor with digital YUV output
Data Sheet V2.0, February 2003
Functional Description
1.1 Image Array
The image array consists of 352x288 pixels. Each pixel has a light sensitive photo diode and a set of
control and transfer transistors. At the beginning of the cycle, a row of pixels are pre-charged to its
maximum value. Then they are exposed to light for several lines worth of time and sampled by the ADC.
Correlated double sampling (CDS) is performed by subtracting the reset value (sampled right before
sampling the signal) from the signal value. The purpose of CDS is to eliminate the point-wise fixed
pattern noise (FPN). The output of CDS is approximately proportional to the amount of received light,
ranging from 0 to 255.
1.2 Color Filter
Each pixel is covered by a color filter. They form the Bayer Pattern as shown in Figure 2. (Row 0, Column
0) is covered by a Red filter, (Row 0, Column 1) and (Row 1, Column 0) by Green filters, and (Row 1,
Column 1) by a Blue filter. Since each pixel only gets part of the frequency band, the data need further
processing (i.e., color interpolation and color correction) in order to approximate the full visible spectrum.
RGRGRGRG
GBGBGBGB
RGRGRGRG
GBGBGBGB
Figure 2. Color filter Bayer pattern
1.3 Exposure and Gain Control
www.DataSheet4TUh.ecobmrightness of the scene may change by a great amount that renders the captured image either
over-exposed or under-exposed. To accommodate for different brightness, the user may change the
exposure time by adjusting the AD_EXPOSE_TIMEH, and AD_EXPOSE_TIMEL. The exposure time is
measured in terms of the time to read out one line of data, which is equal to 83.3 µs (assuming the line
length is 500 @ 12 MHz). If the number of lines per frame is set at 400 (the default), the exposure time can
vary from 1 to 399 lines. In addition, users can adjust bit 7 to 5 of register AD_COL_BEGINH to digitally
boost the output value by 1 to 64 times @ 2N for all the pixels. Furthermore, users can adjust registers
AD_M1_L, AD_M1_H, AD_M2_L, AD_M2_H, AD_M3_L, AD_M3_H, AD_M4_L, AD_M4_H, to
optimize the RGB gain (from 1/256 to 8) of the 4 Bayer pattern pixels separately.
50/60Hz anti-flickering control
To eliminate the flickering caused by the 50Hz or 60Hz light source normally found indoor, an
anti-flickering control circuit is build in. The selection is between off and on. When it is on, then the
selection is between 50 or 60Hz. Register address is to be defined.
©2000, 2001,2002, 2003 IC Media Corporation & IC Me5dia Technology Corp
web site: http://www.ic-media.com/
web site: http://www.ic-media.com.tw/
page 5
2/5/2003
Confidential
5 Page 
ICM202B CIF/QCIF CMOS sensor with digital YUV output
Data Sheet V2.0, February 2003
2. Control Registers by serial bus
Note : *1 Need PART_CONTROL [7] to change value
*2 Need PART_CONTROL [2] to change value
Address Name
0x00
PART_CONTROL
www.DataSheet4U.com
Default
0x00
Description
Processing control
[0] Mode select
0: Normal mode,
1: Single frame mode
[2] Exposure time control, writing a 1 will
activate the new value set in
AD_EXPOSE_TIME, when read back from
it, 0 means either the exposure time change
is finished (in video mode) or the entire
frame is transmitted (in single frame
mode), 1 means either the exposure time
change is still in progress (in video mode)
or the frame is yet to finish (in single frame
mode)
[6:3] Frame rate,
0: 30 fps
1: 15 fps
2: 10 fps
3: 6 fps
4: 5 fps
5: 3 fps
6: 2 fps
7: 1 fps
[7] Latent change, writing a 1 means the
changed latent registers now starts taking
effect, when the entire operation is done,
the read back value of this bit will change
from 1 to 0.
©2000, 2001,2002, 2003 IC Media Corporation & IC M1e1dia Technology Corp
web site: http://www.ic-media.com/
web site: http://www.ic-media.com.tw/
page 11
2/5/2003
Confidential
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ICM202B.PDF ] | |
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