ICM202B CIF/QCIF CMOS sensor with digital YUV output

Data Sheet V2.0, February 2003

2/5/2003

web site:

http://www.ic-media.com/

web site:

http://www.ic-media.com.tw/

page 1

Confidential

ICM202B

CIF/QCIF CMOS image sensor with

digital YUV output

Data Sheet

V2.0

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.

IC Media Corporation

545 East Brokaw Road
San Jose, CA 95112, U.S.A.
Phone: (408) 451-8838
Fax: (408) 451-8839
Email: Sales@IC-Media.Com
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: Ap.Sales@IC-Media.Com.tw
Web Site: www.ic-media.com.tw

ICM202B CIF/QCIF CMOS sensor with digital YUV output

Data Sheet V2.0, February 2003

2/5/2003

web site:

http://www.ic-media.com/

web site:

http://www.ic-media.com.tw/

page 2

Confidential

Features

· 101,376 (352x288) pixels, CIF format, used with 1/7" optical system

· Correlated double sampling

· On-chip 9-bit ADC

· On-chip digital signal processing

· Real-time color interpolation

· Programmable/Automatic exposure control

· Programmable/Automatic white balancing and color correction

· Programmable sharpening control

· Programmable color saturation control

· Programmable gamma correction

· Programmable brightness correction

· Programmable hue correction

· Programmable contrast correction

· Programmable anti-flickering (50Hz, 60Hz or off, like outdoor)

· Progressive readout

· Video mode and single frame mode

· Output data format: 8/16-bit YUV/YCbCr, 24-bit RGB, 16-bit RGB, 8-bit raw data

· Output modes: CIF and Sub-sampling QCIF, programmable

· Input/output interface: SIF

· Power down mode

· Automatic optical black compensation

· Left-Right Mirror image

· Up-down Mirror image

· Single power supply, 2.8+/- 0.2V and/or 3.3V +/- 0.15V

General Description

This is a single-chip digital color imaging device. It incorporates a 352 x 288 sensor array operating at
max. 30 frames per second in progressive manner. Each pixel is covered by a color filter, which formed a
so-called Bayer pattern. Correlated double sampling is performed by the internal ADC and timing
circuitry.

Depending on the brightness of the scene, the raw data can be adjusted by the digital gain for all pixels, or
be adjusted separately for the 4 Bayer pattern pixels. This is done either by the built-in automatic
exposure control circuit, or can be done manually by the external CPU via serial bus control.

The data are then processed by the color interpolation module so that each pixel will get a complete set of
RGB values. To correct or enhance color, automatic white balance circuit is built-in. The user may
perform white balancing and color correction manually by external CPU via serial bus too. Color
saturation control is programmable via serial bus, if user is not satisfied with the default settings

At the final stage, the gamma correction can also be performed, in addition to default value. The output
formats include 8/16-bit YUV or YCbCr, 24-bit, 16-bit RGB, and 8-bit raw data which can be fed to other
DSP, color processing, or compression chips.

ICM202B CIF/QCIF CMOS sensor with digital YUV output

Data Sheet V2.0, February 2003

2/5/2003

web site:

http://www.ic-media.com/

web site:

http://www.ic-media.com.tw/

page 3

Confidential

Application

· Video cellular phone

· PDA

· Digital camcorder

· Digital still camera

· Video phone

· Video conferencing

· Video mail

· PC camera

· Security system

· Visual toy

· Industrial image capture/analysis

· Environment monitor system

Key Parameters

· Number of Active Pixels: 352 x 288

· Number of Physical Pixels: 362 x 298

· Frame Rate: from 30 to 1 fps, flexible

· Pixel Size: 6.0 µm x 6.0 µm

· Sensor Area: 2.2 mm x 1.8 mm (for 1/7" lens)

· Main Clock Frequency: 3 to 12 MHz

· Exposure Time: 83 µs (@ 30 fps, 1 line, 12 MHz) ~ 164 s (@ 1 fps, 65535 lines, 12 MHz), every step: 83 µs

· Digital gain 1x 64x @ 2

for all pixels

· RGB gain from 1/256 to 8 in step of 1/256 for individual Bayer pattern pixels

· S/N Ratio: TBD dB @ TBD lux

· Target Power Supply: 2.8V +/- 0.2V

· Target Power Requirement: <31mW (@ 15fps, 6 MHz, 2.8V),

Package: Shrunk Plastic LCC48 (ICM202Bsa)

ICM202B CIF/QCIF CMOS sensor with digital YUV output

Data Sheet V2.0, February 2003

2/5/2003

web site:

http://www.ic-media.com/

web site:

http://www.ic-media.com.tw/

page 4

Confidential

202B Pin Assignment

Pin #

Name

Class*

Function Descriptions

Xin

A, I

Crystal in

Xout

A, O

Crystal out

PCLK

D, O

Pixel clock output

TEST

D, I, N

Test Mode Input Pin

SYNCMODE

D, I,

Sync. Mode.
0: External Sync,
1: Internal Sync

PWRDOWN

D, I,

Power Down Mode.
0:Enable
1:Disable

Enable

D, I,

Data Output .
0:Disble
1:Enable

I2CA

D, I,

LSB of serial bus address.
0: Device ID address 0x20
1: Device ID address 0x21

MSSEL

D, I,

Serial bus master/slave selection.
0: Slave
1: Master

SCLOCK

D, I/O

Serial bus clock

SDATA

D, I/O

Serial bus data

16 GNDS

P Subtract

GND

RSET

A, I

Resistor to ground
51 K @ Clock = 12Mhz

RSTN

D, I, U

Chip reset, active low

45, 46, 47,
48, 1, 3, 4,
9

DOUT[7:0]
(msb:lsb)

D, O

Sensor Data output[7:0]

28, 30, 34,
35, 36, 37,
38, 39

DOUT[15:8]
(msb:lsb)

D, I/O

1) Input: Test Data Input
2) Sensor

Data

output[15:8]

HSYNC

D, I/O

Horizontal sync signal

VSYNC

D, I/O

Vertical sync signal

BLANK

D, O

Video blank signal

RAMP

A, O

Analog ramp output

11, 33

AVDD

Analog power

12, 32

AGND

Analog ground

6, 19, 43

DVDD

Digital power

5, 17, 44

DGND

Digital ground

7, 31

PVDD

Pad power

8, 29

PGND

Pad ground

Class Code:
A Analog signal, D Digital signal, I Input, O Output, P Power or ground,
U Internal pull-up, N Internal pull-down

ICM202B CIF/QCIF CMOS sensor with digital YUV output

Data Sheet V2.0, February 2003

2/5/2003

web site:

http://www.ic-media.com/

web site:

http://www.ic-media.com.tw/

page 5

Confidential

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.

Figure 2. Color filter Bayer pattern

1.3 Exposure and Gain Control

The brightness 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 @ 2

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.

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