LR38266 View Datasheet(PDF) - Sharp Electronics
Part Name
Description
MFG CO.
LR38266 Datasheet PDF : 20 Pages
| |||
DETAIL EXPLANATION
CCD
CCD type out of 270 k, 320 k, 410 k and 470 k
pixels is selected by address 01h.
Output Signal Format
(1) Analog Video Signal Output
Built-in DA converters output luminance (Y) signal
without CSYNC and modulated color signal of
NTSC or PAL.
Standby mode of DA converter makes DA output
pins high impedance.
(2) Digital Video Signal Output (address 01h)
One out of three formats below is selectable by
address 01h. High level of pin 74 as DOC makes
all digital output pins high impedance.
1. 8-bit Y and 8-bit C
2. 8-bit Y and 8-bit U/V
3. 8-bit U/Y/V/Y
Camera Control Data Output
(1) Exposure Control Data Output (64 data with 8
bits and 2 data with 8 bits)
The user-defined image area consists of 64 blocks
divided into 8 x 8 blocks. Each average luminance
level is output to DATA output pins by setting ADD
input pins.
In the defined area, the maximum luminance level
and the minimum luminance level are output to
DATA output pins.
(2) White Balance Control Data Output (two kinds
of 16 data with 8 bits)
The user-defined image area consists of 16 blocks
divided into 4 x 4 blocks. Average color signal
levels of either both I and Q or both R – Y and B
– Y are output to DATA output pins by setting ADD
input pins.
LR38266
(3) Black Balance Control Data Output (3 data with
8 bits)
Three kinds of outputs below are at DATA output
pins.
• An average signal of CCD optical black portion
consisting of 4 pixels per horizontal line for 128
horizontal lines located in the image center.
• An average signal of CCD optical black portion
consisting of 2 pixels per horizontal line for 128
horizontal lines located in the image center, which
is available to tune the base level of Mg + Ye
color signal component.
• An average signal of CCD optical black portion
consisting of 2 pixels per horizontal line for 128
horizontal lines located in the image center, which
is available to tune the base level of Mg + Cy
color signal component.
Camera Signal Processing
(1) Optical Black Signal Clamping
The optical black signal portion is clamped so as to
be 64h by using the average level of the input
digital signal. The averaging is done for every field.
(2) Horizontal Period Delay Line
There are two horizontal delay lines in this IC for
camera signal processing.
(3) Digital Filter for Luminance Signal
These are low-pass filters to make a Y signal from
the color CCD signal.
(4) Gamma Correction for Luminance Signal
10-bit input signal is converted into an 8-bit signal
with a gamma curve defined by 10 straight lines.
Slope and position of every straight line can be set
by address.
(5) Edge Enhancement of Luminance Signal
After gamma correction, the edge of the luminance
signal is enhanced in both horizontal and vertical.
How to enhance is tunable by address.
17
Share Link: 