‡
Pre lim in a ry
MT9V012 - 1/6-In ch VGA CMOS Dig it a l Im a g e Se n so r
Re g ist e rs
Ta b le 6: Re g ist e r De scrip t io n (co n t in u e d )
Syn c’d
De fa u lt t o Fra m e
Ba d
Fra m e
Bit
Bit De scrip t io n
(h e x)
St a rt
11
0
N
Y
N
N
Use Black Level 1 = Use black level frame average from the dark rows in the
Average
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.
14:12
0
0
N
N
Gain Threshold 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.
15
Frame-Wise
Digital
Correction
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.
0x5B (91) Gre e n 1 Fra m e Ave ra g e
6:0
0
0
0
0
N
N
N
N
N
N
N
N
Green1 Frame
Average
The frame averaged green1 black level that is used in the
black level calibration algorithm. Read-only.
0x5C (92) Blu e Fra m e Ave ra g e
6:0
Blue Frame
Average
The frame averaged blue black level that is used in the black
level calibration algorithm. Read-only.
0x5D (93) Re d Fra m e Ave ra g e
6:0
Red Frame
Average
The frame averaged red black level that is used in the black
level calibration algorithm. Read-only.
0x5E (94) Gre e n 2 Fra m e Ave ra g e
6:0
Green2 Frame
Average
The frame averaged green2 black level that is used in the
black level calibration algorithm. Read-only.
0x5F (95) Ca lib Th re sh o ld
6:0
1D
23
N
N
N
N
Lower
Threshold
Lower threshold for targeted black level in ADC LSBs.
14:8
Upper
Upper threshold for targeted black level in ADC LSBs.
Threshold
0x60 (96) Ca lib ra t io n Co n t ro l
0
0
N
Y
Manual
Override
Manual override of black level correction.
1 = Override automatic black level correction with
programmed values. (Reg0x61 - 0x64).
0 = normal operation (default).
1
2
0
0
N
N
Y
Y
Same Green
Same Red/Blue
Reserved
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.
3
4
0
0
N
N
Step Size Forced When set, the step size will be forced to “1” for the rapid-
to One
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.
PDF: 814eb99f/Source: 8175e929
MT9V012_2.fm - Rev. B 2/05 EN
Micron Technology, Inc., reserves the right to change products or specifications without notice.
©2004 Micron Technology, Inc. All rights reserved.
29
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