Confidential

HV7161SPA2

CMOS Image Sensor

With Image Signal Processing

consumption is decreased considerably.

Note: You should set the integration time to multiple of AE-Step before waking power-down

mode. This is because the default integration time and integration scan offset are set to multiples

of 50Hz. If you leave out Integration time setting step, the banding under fluorescent light will be

occurred even though other AE related registers are set appropriately. The setting order is follow,

1. Enter into the soft power-down mode.

2. Set the AE step (minimum frame rate).

3. Set the integration time to 4 times of AE step.

4. Wake the soft power-down mode.

External hard power-down

During ENB pin is '0', sensor goes to a deep-sleep

mode(hard power-down mode) and all sensor operation is stopped. Also power consumption is

minimized dramatically. After ENB pin goes from low to high level and 1 frame operation is done,

sensor operation is stable and you can capture image data and configure each specific register.

The sensor reset and hard power-down scheme follows

,

This document has a general product description and is subject to change without notice.

MagnaChip Semiconductor Ltd. does not assume any responsibility for use of circuits described

and no patent licenses are implied.

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2005 MagnaChip Semiconductor Ltd.

Note: In the internal(I2C control) or external(ENB) power-down mode, all output and bidirectional

pins have a state of Hi-Z(high impedance). In addition to power-down mode, Y[7:0] and C[7:0] pins

have a state of Hi-Z during HSYNC pin is low level.

Note: To minimize a power consumption at the external hard power-down mode(by ENB pin),

the sensor's main power should be turned off together.

Pixel Architecture

Pixel architecture is a 4 transistor NMOS pixel design. The additional use of a dedicated transfer

transistor in the architecture reduces most of reset level noise so that fixed pattern noise is not

visible. Furthermore, micro-lens is placed upon each pixel in order to increase fill factor so that

high pixel sensitivity is achieved.

Sensor Imaging Operation

Imaging operation is implemented by the offset mechanism of integration domain and scan

domain(rolling shutter scheme). First integration plane is initiated, and after the programmed

integration time is elapsed, scan plane is initiated, then image data start being produced.