ICM-102ASA View Datasheet(PDF) - Unspecified
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ICM-102ASA Datasheet PDF : 15 Pages
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ICM102A CIF CMOS sensor
Data Sheet Version1.0 July 2002
2. Functional Description
ICM-102A is a single-chip digital color imaging device. It includes a 352x288 sensor array, 352
column-level ADC, and correlated double sampling circuitry. All the programmable parameters are set
by writing into the SIF interface which can address the register file consisting of 8-bit registers. The
output format is 8-bit raw data, together with horizontal and vertical sync signals.
I2C
Interface
Timing
Control
Sensor Array
352x288
Column-Level
ADC
Correlated
Double
Sampling
Digital
Gain
RGB Output
Format Control
Figure 1. Block diagram
2.1 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 is pre-charged to its
maximum value. Then the row is exposed to light for several lines worth of time and sampled by the
ADC. A “Correlated Double Sampling (CDS)” process is performed with 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.
2.2 Color Filter
Each pixel is covered by a color filter. They form the Bayer Pattern as shown in Figure 3. (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
©2000, 2001, 2002 IC Media Corporation & IC Media Technology Corp.
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7/24/2002
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