
Confidential
HV7161SPA2
CMOS Image Sensor
With Image Signal Processing
displacement from Cb, Cr white target point, R, B scaling values for R, B data are resolved and R,
G color gain is mutually increased or decreased.
On-chip frequency synthesizer (PLL)
The PLL is a 1.8V CMOS analog programmable frequency synthesizer based on charged pump
type PLL for an on-chip application. PLL has a wide output range. Operating frequency and loop
characteristics of PLL are fully programmable. When it is used with the default mode(2x), the
output frame rate is supported up to 15frame per second at MCLK 21MHz and VCLK generates up
to 42MHz.
Luminance processing - Contrast and brightness
For contrast adjustment, Y digital channels are scaled by the contrast factor. Contrast factor
resolution is 1/128 and its range is 0 ~ 255/128.
For brightness adjustment, there is added a brightness factor to Y digital channels. Brightness
factor range is –128 ~ 127 and register value for brightness adjustment is following below.
For positive values, Brightness factor = Integer;
For negative values, Brightness factor = Two’s Complement(Integer);
For example, if brightness factor is 3, register value is 8’h03 and if brightness factor is -3, register
value is 8’hfd.
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.
Chrominance processing - Hue, saturation, chroma suppression, and false color
suppression
For saturation adjustment, Cb, Cr digital Channels are scaled by the saturation factor. Saturation
factor resolution is 1/128 and its range is 0 ~ 255/128.
Chroma suppression is performed in the dark environment for suppressing the color and
decreasing dark bad pixel effect. Suppression level is varied in accordance with amplifier gain and