MT9V012 Micron, MT9V012 Datasheet - Page 29

• Manufacturer Part Number: MT9V012
• Description: 1/6-Inch VGA CMOS Digital Image Sensor
• Manufacturer: Micron

Table 6:
PDF: 814eb99f/Source: 8175e929
MT9V012_2.fm - Rev. B 2/05 EN
0x5B (91) Green1 Frame Average
0x5C (92) Blue Frame Average
0x5D (93) Red Frame Average
0x5E (94) Green2 Frame Average
0x5F (95) Calib Threshold
0x60 (96) Calibration Control
14:12
14:8
Bit
6:0
6:0
6:0
6:0
6:0
11
15
0
1
2
3
4
Use Black Level
Average
Gain Threshold
Frame-Wise
Digital
Correction
Green1 Frame
Average
Blue Frame
Average
Red Frame
Average
Green2 Frame
Average
Lower
Threshold
Upper
Threshold
Manual
Override
Same Green
Same Red/Blue
Reserved
Step Size Forced
to One
Register Description (continued)
1 = Use black level frame average from the dark rows in the
row noise correction algorithm for low gains. Note that this
frame average was taken before the last adjustment of the
offset DAC for that frame, so it might be slightly off.
0 = Use the mean of black level programmed threshold in
the row noise correction algorithm for low gains.
When the upper analog gain bits are equal to or larger than
this threshold, the dark column average is used in the row
noise correction algorithm. Otherwise, the value to subtract
is decided by bit 11. This check is done independently for
each color, and is a means to turn off the black level
algorithm for lower gains, if desired.
By default, the row noise is calculated and applied
individually for each color of each row. When this bit is set,
the row noise is calculated and applied for each color of
each of the first two rows (2 pairs of values) and the same
values are applied to each subsequent row, so that new
values are calculated and applied once per frame.
The frame averaged green1 black level that is used in the
black level calibration algorithm. Read-only.
The frame averaged blue black level that is used in the black
level calibration algorithm. Read-only.
The frame averaged red black level that is used in the black
level calibration algorithm. Read-only.
The frame averaged green2 black level that is used in the
black level calibration algorithm. Read-only.
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. (Reg0x61 - 0x64).
0 = normal operation (default).
When this bit is set, the same calibration value will be used
for all green pixels: Calib green2 = calib green1.
When this bit is set, the same calibration value will be used
for red and blue pixels: calib blue = calib red.
When set, the step size will be forced to “1” for the rapid-
sweep algorithm. Default operation (0) is to start at a higher
step size when in rapid sweep mode, to converge to the
correct value faster.
Bit Description
MT9V012 - 1/6-Inch VGA CMOS Digital Image Sensor
29
Micron Technology, Inc., reserves the right to change products or specifications without notice.
Default
(hex)
1D
23
0
0
0
0
0
0
0
0
0
0
0
0
©2004 Micron Technology, Inc. All rights reserved.
to Frame
Sync’d
Start
N
N
N
N
N
N
N
N
N
N
N
N
N
Preliminary
Registers
Frame
Bad
Y
N
N
N
N
N
N
N
N
Y
Y
Y
N
‡