MT9T001 View Datasheet(PDF) - Micron Technology

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MT9T001

3-MEGAPIXEL DIGITAL IMAGE SENSOR

Micron Technology 

PRELIMINARY

MT9T001

3-MEGAPIXEL DIGITAL IMAGE SENSOR

Table 6: Register Descriptions (continued)

REGISTER BIT

DESCRIPTION

Black Level Calibration Coarse Thresholds

0x5D

6:0 Low Coarse Threshold—default = 0x13. This value should be less than Low Target Threshold.

See High Coarse Threshold below.

14:8 High Coarse Threshold—default = 0x2D. If the average black value for a color is higher than

this value or lower than Low Coarse Threshold, the coarse mode will be activated (if enabled).

Once the black level is between the High Coarse Threshold and the Low Coarse Threshold, the

fine method will be used. This value should be set no lower than High Target Threshold.

Black Level Calibration Target Thresholds

0x5F

6:0 Thres_lo: Lower threshold for black level in units of ADC LSBs—default = 29.

14:8

Green1 Offset

0x60

8:0

Thres_hi: Upper threshold for black level in units of ADC LSBs—default = 35. When the black

value for a color is within these thresholds, it will be considered to be on target.

Cal Green1—Two's compliment representation of analog offset correction value for Green1.

Green2 Offset

0x61

8:0 Cal Green2—Two's compliment representation of analog offset correction value for Green2.

Black Level Calibration

0x62

0 Manual override of black level correction.

1 = override automatic black level correction with programmed values.

0 = normal operation (default).

1 Force/disable black level calibration.

0 = Enable Offset Correction (default).

1 = disable Offset Correction Voltage (Offset Correction Voltage = 0.0V).

12 Recalculate Black Level—1 = start a new running digitally filtered average for the black level

(this is internally reset to “0” immediately), and do a rapid sweep to find the new starting

point.

0 = normal operation (default).

13 Lock Red/Blue Calibration—when set, only one calibration value will be used for both red and

blue channels. Default is 0, set to “0” at all times.

Note: Gain for Red and Blue channels must be equal for setting to be effective.

Red Offset

0x63

14 Lock Green Calibration—when set, only one calibration value will be used for both Green1 and

Green2 channels. Default is 0, set to “0” at all times.

Note: Gain for Green1 and Green2 channels must be equal for setting to be effective.

8:0 Cal Red.

Two's compliment representation of analog offset correction value for Red.

Blue Offset

0x64

8:0 Cal Blue.

Two's compliment representation of analog offset correction value for Blue.

Chip Enable and Two-Wire Serial Interface Write Synchronize

0xF8

0 Mirrors the functionality of Reg0x07 bit 1,(Chip Enable).

1 = normal operation.

0 = stop sensor read out. When this is returned to “1,” sensor read out restarts at the starting

row in a new frame.

1 Mirrors the functionality of Reg0x07 bit 0 (Synchronize changes).

0 = normal operation, update changes to registers that affect image brightness (integration

time, integration delay, gain, horizontal and vertical blank, window size, row/column skip, or

row/column mirror) at the next frame boundary.

1 = do not update any changes to these settings until this bit is returned to ”0.”

09005aef80c64010

MT9T001_3100_DS_2.fm - Rev. C 9/04 EN

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Micron Technology, Inc., reserves the right to change products or specifications without notice.

©2003 Micron Technology, Inc. All rights reserved.

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