mt9v011p11st Micron Semiconductor Products, mt9v011p11st Datasheet - Page 24

• Manufacturer Part Number: mt9v011p11st
• Description: 1/4-inch Vga Cmos Active-pixel Digital Image Sensor
• Manufacturer: Micron Semiconductor Products

Recommdended Gain Settings
are set by registers Reg0x2B, Reg0x2C, Reg0x2D, and
Reg0x2D, respectively. Gain can also be set globally by
Reg0x35. The analog gain is set by bits[8:0] of the cor-
responding register as following:
ters.
offer signal gains from 1 to 15.875.
T able 9:
09005aef80c6407f
MT9V011_external_DS_2.fm - Rev. A 8/04 EN
The gains for green1, blue, red, and green2 pixels
Gain = (Bit[8] + 1) x (Bit[7] + 1) x (Bit[6:0]/32)
Digital gain is set by bits 9 and 10 of the same regis-
The analog gain circuitry (pre-ADC) is designed to
DESIRED GAIN
8.000 to 15.875
1.000 t o 1.969
2.000 t o 7.938
Recommended Gain Settings
RECOMMENDED SETTINGS (GAIN
0x0020 to 0x003F
0x01C0 to 0x01FF
0x00A0 to 0x00FF
REGISTERS)
24
1/4-INCH VGA CMOS ACTIVE-PIXEL
responds to the lowest setting where the pixel signal is
guaranteed to saturate the ADC under all specified
operating conditions. A ny reduction of the gain below
this value may cause the sensor to saturate at ADC out-
put values less than the maximum, under certain con-
ditions. It is recommended that this guideline be
followed at all times.
cative factors for the gain settings, there are alternative
ways of achieving certain gains. Some settings offer
superior noise performance to others, while the same
overall gain. Table 9 lists the recommended gain set-
tings.
The minimum gain of 1 (register set to 0x0020) cor-
Since bits 7 and 8 of the gain registers are multipli-
Micron Technology, Inc., reserves the right to change products or specifications without notice.
DIGITAL IMAGE SENSOR
CONVERSION FORMULA
(Register value - 128)/16
(Register value - 384)/8
(Register value)/32
(ARITHMETIC)
©2004 Micron Technology, Inc.
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