ICM107B Mega pixel CMOS sensor

Data sheet Version 0.5, January 2002

©2000, 2001,2002 IC Media Corporation & IC Media Technology Corp

10/29/2002

page 6

Confidential

2. Functional Description

ICM-107B is a single-chip digital color imaging device. It includes a 1152x864 sensor array, 1152

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 10-bit raw data, together with horizontal and vertical sync signals.

SIF

Interface

Sensor Array

1152 x 864

Column-Level

ADC

Timing & Function

Control

Correlated

Double

Sampling

Individual

RGB gain control

RGB Bayer Pattern

Output Control

Figure 1. Block diagram

2.1 Image Array

The image array consists of 1152x864 pixels. Each pixel has a light sensitive photo diode and a set of

control 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 1023.