mt9v034c12stmdes aptina, mt9v034c12stmdes Datasheet - Page 34

• Manufacturer Part Number: mt9v034c12stmdes
• Description: 1/3-inch Wide-vga Cmos Digital Image Sensor
• Manufacturer: aptina

Table 9:
PDF: 09005aef8366edcb/Source: 09005aef8366ede5
MT9V034_DS - Rev. A 10/08 EN
0x42 (66) Frame Dark Average
0x46 (70) Dark Average Thresholds
0x47 (71) Black Level Calibration Control
0x48 (72) Black Level Calibration Value Context A
0x4C (76) Black Level Calibration Value Step Size
15:8
5:0
7:0
7:0
7:5
7:0
4:0
Bit
0
V4 Voltage Level
Frame Dark
Average
Lower threshold
Upper threshold
Manual Override Manual override of black level correction.
Frames to
average over
Black Level
Calibration Value
Step Size of
Calibration Value
Bit Name
Register Descriptions (continued)
For bits (5:0) = 0 to 5,
V_step = bits (5:0) * 200mV + 0.2V.
Range: 0.2 - 1.2V
For bits (5:0) = 6 to 63
V_step = bits (5:0) * 23.5mV + 1.62V
Range: 1.76-3.1V
Note: Equation and range are determined with the
assumption that VAA = 3.3V. They may vary with
actual VAA voltage.
Default: 0.8V
Usage: Vstep HDR parking voltage, also provides
anti-blooming when Vstep is disabled.
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.
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.
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.
Note: 1 calib LSB = ½ ADC LSB, assuming analog gain =
1.
Bit Description
Aptina Confidential and Proprietary
34
MT9V034: 1/3-Inch Wide-VGA Digital Image Sensor
Default in
Hex (Dec)
(29)
(35)
03
(3)
1D
23
02
Aptina Imaging reserves the right to change products or specifications without notice.
0
0
4
–
Shadowed
N
N
N
N
N
N
N
©2008 Aptina Imaging Corporation. All rights reserved.
–127 to
Values
0–255
0–255
Legal
(Dec)
0–63
0–31
0–7
127
0, 1
Registers
Read/
Write
RW
W
W
W
W
W
W
R