mt9v032 aptina, mt9v032 Datasheet - Page 29

• Manufacturer Part Number: mt9v032
• Description: 1/3-inch Wide-vga Cmos Digital Image Sensor
• Manufacturer: aptina

Table 8:
PDF: 6538045704/Source:2194051501
MT9V022_DS - Rev. C 9/10 EN
Bit
0x36 (54) Maximum Analog Gain
0x42 (66) Frame Dark Average
0x46 (70) Dark Average Thresholds
0x47 (71) Black Level Calibration Control
0x48 (72) Black Level Calibration Value
0x4C (76) Black Level Calibration Value Step Size
15:8
15:8
6:0
7:0
7:0
7:5
7:0
4:0
0
Maximum Analog
Gain
Frame Dark
Average
Lower threshold
Upper threshold
Manual Override
Frames to average
over
Reserved
Black Level
Calibration Value
Step Size of
Calibration Value
Bit Name
Register Descriptions (continued)
This register is used by the automatic gain control (AGC)
as the upper threshold of gain. This ensures the new
calibrated gain value does not exceed that which the
MT9V032 supports.
Range: 16
exception detection is installed; caution should be
taken when programming.
The value read is the frame averaged black level, that is,
used in the black level algorithm calculations.
Lower threshold for targeted black level in ADC LSBs.
Upper threshold for targeted black level in ADC LSBs.
Manual override of black level correction.
1 = Override automatic black level correction with
programmed values. (R0x48).
0 = Normal operation (default).
Two to the power of this value decide how many frames
to average over when the black level algorithm is in the
averaging mode. In this mode the running frame
average is calculated from the following formula:
Running frame ave = Old running frame ave - (old
running frame ave)/2n + (new frame ave)/ 2n.
Reserved.
Analog calibration offset: Negative numbers are
represented with two’s complement, which is shown in
the following formula:
Sign = bit 7 (0 is positive, 1 is negative).
If positive offset value: Magnitude = bit 6:0.
If negative offset value: Magnitude = not (bit 6:0) + 1.
During two-wire serial interface read, this register
returns the user-programmed value when manual
override is enabled (R0x47 bit 0); otherwise, this
register returns the result obtained from the calibration
algorithm.
This is the size calibration value may change (positively
or negatively) from frame to frame.
1 calib LSB = ½ ADC LSB, assuming analog gain = 1.
dec
–64
dec
for 1X–4X respectively. Note: No
Bit Description
30
MT9V032: 1/3-Inch Wide-VGA Digital Image Sensor
Default in
Hex (Dec)
(128)
(64)
(29)
(35)
1D
40
23
80
0
0
4
0
2
Aptina reserves the right to change products or specifications without notice.
Shadowed
N
N
N
N
N
N
Y
©2005 Aptina Imaging Corporation. All rights reserved.
–127 to
Values
16–64
0–255
0–255
Legal
(Dec)
0–31
0–7
127
0, 1
Registers
Read/
Write
W
W
W
W
W
W
W
R