Datasheet
Table Of Contents
- 1/2-Inch Megapixel CMOS Digital Image Sensor
- Applications
- General Description
- List of Tables
- List of Figures
- General Description
- Pixel Data Format
- Serial Bus Description
- Two-Wire Serial Interface Sample Write and Read Sequences
- Registers
- Feature Description
- Registers
- Electrical Specifications
- Data Output and Propagation Delays
- Two-wire Serial Bus Timing
- Figure 18: Serial Host Interface Start Condition Timing
- Figure 19: Serial Host Interface Stop Condition Timing
- Figure 20: Serial Host Interface Data Timing for Write
- Figure 21: Serial Host Interface Data Timing for Read
- Figure 22: Acknowledge Signal Timing After an 8-Bit Write to the Sensor
- Figure 23: Acknowledge Signal Timing After an 8-Bit Read from the Sensor
- Quantum Efficiency
- Image Center Offset and Orientation
- Revision History
80a3e031 Micron Technology, Inc., reserves the right to change products or specifications without notice.
MT9M001_DS_2.fm - Rev.C 7/05 EN
16 ©2004 Micron Technology, Inc. All rights reserved.
MT9M001 - 1/2-Inch Megapixel Digital Image Sensor
Registers
Read Mode 1
In read mode 1, this register is used to control many aspects of the readout of the sensor.
0x1E 0
Reserved
—default is 0; set to zero at all times.
1
Reserved
—default is 0; set to zero at all times.
2
Column Skip 4
—default is 0 (disable).
1 = enable.
3
Row Skip 4
—default is 0 (disable).
1 = enable.
4
Column Skip 8
—default is 0 (disable).
1 = enable.
5
Row Skip 8
—default is 0 (disable).
1 = enable.
6
Reserved
—default is 0; do not change.
7
Reserved
—default is 0; do not change.
8
Snapshot Mode
—default is 0 (continuous mode).
1 = enable (wait for TRIGGER; TRIGGER can come from outside signal (TRIGGER pin on the sensor)
or from serial interface register restart, i.e. programming a “1” to bit 0 of Reg0x0B.
9
STROBE Enable
—default is 0 (no STROBE signal).
1 = enable STROBE (signal output from the sensor during the time all rows are integrating. See
STROBE width for more information).
10
STROBE Width
—default is 0 (STROBE signal width at minimum length, 1 row of integration time,
prior to line valid going HIGH).
1 = extend STROBE width (STROBE signal width extends to entire time all rows are integrating).
11
Strobe Override
—default is 0 (STROBE signal created by digital logic).
1 = override STROBE signal (STROBE signal is set HIGH when this bit is set, LOW when this bit is set
LOW. It is assumed that STROBE enable is set to “0” if STROBE override is being used).
12
Reserved
—default is 0; do not change.
13
Reserved
—default is 0; do not change.
14
Reserved
—default is 0; do not change.
15
Reserved
—default is 1; do not change.
Gain Settings
The gain is individually controllable for each of the four groups of pixels that lie in odd rows and columns, even rows and
columns, odd rows and even columns, and even rows and odd columns. This is shown in the register chart.
Formula for gain setting:
Gain ≤ 8
Gain = (bit[6] + 1) x (bit[5-0] x 0.125)
Gain > 8 (bit[6] = 1 and bit[5] = 1)
Gain = 8.0 + bit[2-0]
Since bit[6] of the gain registers are multiplicative factors for the gain settings, there are alternative ways of achieving
certain gains. Some settings offer superior noise performance to others, despite the same overall gain. The following lists
the recommended gain settings:
Gain
Increments Recommended Settings
1.000 to 4.000 0.125 0x08 to 0x20
4.25 to 8.00 0.25 0x51 to 0x60
9.0 to 15.0 1.0 0x61 to 0x67
0x2B 6:0
Even row, even column
—default = 0x08 (8) = 1x gain.
0x2C 6:0
Odd row, even column
—default = 0x08 (8) = 1x gain.
Table 6: Register Description (continued)
Register Bit Description
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