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MT9V111 Datasheet(PDF) 28 Page - Micron Technology

Part No. MT9V111
Description  1/4-Inch SOC VGA CMOS Active-Pixel Digital Image Sensor
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Maker  MICRON [Micron Technology]
Homepage  http://www.micron.com
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MT9V111 Datasheet(HTML) 28 Page - Micron Technology

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Micron Technology, Inc., reserves the right to change products or specifications without notice.
MT9V111_2.fm - Rev. G 1/05 EN
28
©2004 Micron Technology, Inc. All rights reserved.
MT9V111 - 1/4-Inch SOC VGA Digital Image Sensor
Sensor Core Registers
Read Mode
This register is used to control many aspects of the readout of the sensor.
32
0x20
To preserve a right-reading image and the correct color order, all four of these bits should be set to “1” to
invert the image.
5
1 = readout starting 1 column later.
0 = normal readout.
7
1 = readout starting 1 row later.
0 = normal readout.
14
1 = read out from right to left (mirrored).
0 = normal readout.
15
1 = read out from bottom to top (upside down).
0 = normal readout.
Gain Settings
The gain is individually controllable for each color in the Bayer pattern as shown in the register chart. Formula for gain
setting:
Gain = (Bit [8] + 1) x (Bit [7] + 1) x (Bit [6–0] x 0.03125)
Since Bit [7] and Bit [8] of the gain registers are multiplicative factors for the gain settings, there are alternative ways of
achieving certain gains. Some settings offer superior noise performance to others, despite the same overall gain.
The following lists the recommended gain settings:
Gain
Increments
Recommended Settings
1.000 to 1.969
0.03125
0x020 to 0x03F
2.000 to 7.938
0.0625
0x0A0 to 0x0FF
8.000 to 15.875
0.125
0x1C0 to 0x1FF
43
0x2B
Green1 gain
default = 0x0020 (32) = 1x gain.
6:0
Initial Gain = bits (6:0) x 0.03125.
7, 8
Analog Gain = (bit 8 + 1) x (bit 7 + 1) x initial gain (each bit gives 2x gain).
9,10
Total Gain = (bit 9 + 1) x (bit 10 + 1) x analog gain (each bit gives 2x gain).
44
0x2C
Blue Gain
default = 0x0020 (32) = 1x gain.
6:0
Initial Gain = bits (6:0) x 0.03125.
7, 8
Analog Gain = (bit 8 + 1) x (bit 7 + 1) x initial gain (each bit gives 2x gain).
9,10
Total Gain = (bit 9 + 1) x (bit 10 + 1) x analog gain (each bit gives 2x gain).
45
0x2D
Red Gain
default = 0x0020 (32) = 1x gain.
6:0
Initial Gain = bits (6:0) x 0.03125.
7, 8
Analog Gain = (bit 8 + 1) x (bit 7 + 1) x initial gain (each bit gives 2x gain.)
9,10
Total Gain = (bit 9 + 1) x (bit 10 + 1) x analog gain (each bit gives 2x gain).
46
0x2E
Green2 Gain
default = 0x0020 (32) = 1x gain.
6:0
Initial Gain = bits (6:0) x 0.03125.
7, 8
Analog Gain = (bit 8 + 1) x (bit 7 + 1) x initial gain each bit gives 2x gain).
9,10
Total gain = (bit 9 + 1) x (bit 10 + 1) x analog gain (each bit gives 2x gain).
Global Gain
53
0x35
Global Gain
default = 0x0020 (32) = 1x gain. This register can be used to set all four gains at once.
When read, it will return the value stored in Reg0x2B.
Table 9:
Sensor Core Register Description (Continued)
Register
(Dec)
(Hex)
Bit
Description


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