MT9V112 Datasheet, PDF (32/58 Pages) Micron Technology – SOC VGA DIGITAL IMAGE SENSOR

PRELIMINARY
MT9V112
SOC VGA DIGITAL IMAGE SENSOR
Sensor Core Overview
The sensor consists of a pixel array of 695 x 504 total,
an analog readout chain, 10-bit ADC with programma-
ble gain and black offset, and timing and control.
Figure 5: Sensor Core Block Diagram
Active Pixel
Sensor (APS)
Array
Control Register
Timing and Control
Communication
Bus
to IFP
Clock
Sync
Signals
Analog Processing
ADC
10-Bit Data
to IFP
Pixel Data Format
Pixel Array Structure
The sensor core pixel array is configured as 695 col-
umns by 504 rows, shown in Figure 6. The first 34 col-
umns and the first 14 rows of pixels are optically black,
and can be used to monitor the black level. The last 12
columns and the last row of pixels also are optically
black.
The black row data is used internally for the auto-
matic black level adjustment. However, these black
rows can also be read out by setting the sensor to raw
data output mode.
There are 649 columns by 489 rows of optically-
active pixels that provide a four-pixel boundary
around the VGA (640 x 480) image to avoid boundary
effects during color interpolation and correction.
The additional active column and additional active
row are used to enable horizontally and vertically mir-
rored readout to start on the same color pixel.
Figure 6: Pixel Array Description
14 Black Rows
(0, 0)
12 Black Columns
VGA (640 x 480)
+ 4-pixel boundary for
color correction
+ additional active column
+ additional active row
= 649 x 489 active pixels
34 Black Columns
(694,503)
1 Black Row
The sensor core uses an RGB Bayer color pattern,
shown in Figure 7. The even-numbered rows contain
green and red color pixels, and odd-numbered rows
contain blue and green color pixels. The even-num-
bered columns contain green and blue color pixels;
odd-numbered columns contain red and green color
pixels.
Figure 7: Pixel Color Pattern Detail
(top right corner)
Column Readout Direction
...
Black Pixels
GRGRGRG
First Clear
Pixel
(34, 14)
Row
BGBGBGB
Readout
Direction
...
G
R
G
R
G
R
G
BGBGBGB
GRGRGRG
BGBGBGB
09005aef8154a39d/09005aef8175e6cc
MT9V112_2.fm- Rev. A 1/05 EN
32
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©2004 Micron Technology, Inc. All rights reserved.