Datasheet
Table Of Contents
- 1/3.2-Inch System-On-A-Chip (SOC) CMOS Digital Image Sensor
- Features
- Applications
- Ordering Information
- General Description
- Feature Overview
- Typical Connection
- Ballout and Interface
- Architecture Overview
- Registers and Variables
- Registers
- Registers
- IFP Registers, Page 1
- IFP Registers, Page 2
- JPEG Indirect Registers
- Table 8: JPEG Indirect Registers (See Registers 30 and 31, Page 2)
- Firmware Driver Variables
- Table 9: Drivers IDs
- Table 10: Driver Variables-Monitor Driver (ID = 0)
- Table 11: Driver Variables-Sequencer Driver (ID = 1)
- Table 12: Driver Variables-Auto Exposure Driver (ID = 2)
- Table 13: Driver Variables-Auto White Balance (ID = 3)
- Table 14: Driver Variables-Flicker Detection Driver (ID = 4)
- Table 15: Driver Variables-Auto Focus Driver (ID = 5)
- Table 16: Driver Variables-Auto Focus Mechanics Driver (ID = 6)
- Table 17: Driver Variables-Mode/Context Driver (ID = 7)
- Table 18: Driver Variables-JPEG Driver (ID = 9)
- Table 19: Driver Variables-Histogram Driver (ID = 11)
- MCU Register List and Memory Map
- JPEG Indirect Registers
- Output Format and Timing
- Sensor Core
- Feature Description
- PLL Generated Master Clock
- PLL Setup
- Window Control
- Pixel Border
- Readout Modes
- Figure 20: 6 Pixels in Normal and Column Mirror Readout Modes
- Figure 21: 6 Rows in Normal and Row Mirror Readout Modes
- Table 30: Skip Values
- Figure 22: 8 Pixels in Normal and Column Skip 2x Readout Modes
- Figure 23: 16 Pixels in Normal and Column Skip 4x Readout Modes
- Figure 24: 32 Pixels in Normal and Column Skip 8x Readout Modes
- Figure 25: 64 Pixels in Normal and Column Skip 16x Readout Modes
- Table 31: Row Addressing
- Table 32: Column Addressing
- Frame Rate Control
- Context Switching
- Integration Time
- Flash STROBE
- Global Reset
- Analog Signal Path
- Analog Inputs AIN1-AIN3
- Firmware
- Firmware
- Start-Up and Usage
- General Purpose I/O
- Introduction
- GPIO Output Control Overview
- Waveform Programming
- Notification Signals
- Digital and Analog Inputs
- GPIO Software Drivers
- Auto Focus
- Figure 42: Search for Best Focus
- Figure 43: Scene with Two Potential Focus Targets at Different Distances from Camera
- Figure 44: Dependence of Luminance-Normalized Local Sharpness Scores on Lens Position
- Figure 45: Example of Position Weight Histogram Created by AF Driver
- Figure 46: Auto Focus Windows
- Figure 47: Computation of Sharpness Scores and Luminance Average for an AF Window
- Table 41: Examples of AF Filters that can be Programmed into the MT9D111
- Spectral Characteristics
- Electrical Specifications
- Packaging
- Appendix A: Two-Wire Serial Register Interface
- Protocol
- Sequence
- Bus Idle State
- Start Bit
- Stop Bit
- Slave Address
- Data Bit Transfer
- Acknowledge Bit
- No-Acknowledge Bit
- Page Register
- Sample Write and Read Sequences
- Figure 52: WRITE Timing to R0x09:0-Value 0x0284
- Figure 53: READ Timing from R0x09:0; Returned Value 0x0284
- Figure 54: WRITE Timing to R0x09:0-Value 0x0284
- Figure 55: READ Timing from R0x09:0; Returned Value 0x0284
- Figure 56: Two-Wire Serial Bus Timing Parameters
- Table 46: Two-wire Serial Bus Characteristics
- Revision History
PDF: 09005aef8202ec2e/Source: 09005aef8202ebf7 Micron Technology, Inc., reserves the right to change products or specifications without notice.
MT9D111__7_REV5.fm - Rev. B 2/06 EN
158 ©2004 Micron Technology, Inc. All rights reserved.
MT9D111 - 1/3.2-Inch 2-Megapixel SOC Digital Image Sensor
Start-Up and Usage
Micron Confidential and Proprietary
giving preference to increase in gain. ae.maxGain23 specifies maximum allowed gain
in this situation. ae.VirtGain indicates current green channel gain.
• In darker situations, the gain achieves ae.maxGain23 and the integration time is
allowed to increase again up to ae.maxIndex.
• In yet darker situations, once the integration time achieves ae.maxIndex, the analog
gain is allowed to increase up to ae.maxVirtGain.
• In very dark conditions, the digital IFP gains are allowed to increase up to
ae.maxDGainAE1 and ae.maxDGainAE2.
ADC is used as an additional gain stage by adjusting reference levels. See ae.ADC* vari-
ables.
Figure 39: Gain vs. Exposure
Lens Correction Zones
In order to increase the precision of the correction function, the image plane is divided
into 8 zones in each dimension. The coordinates of zone boundaries are referenced with
respect to the lens center, C. Each boundary as well as C (Cx, Cy) coordinate is stored as a
byte, which represents the coordinate value divided by 4. There always three boundaries
to the left (top) of the center and three to the right (bottom) of the center. These bound-
aries apply uniformly for each color channel. However, the correction functions are pro-
grammable independently for each color component. Boundary and lens center
positions are also valid for the preview mode. Figure 40 illustrates the lens correction
zones.
ae.R9_step
2X
2 * ae.R9_step
3 * ae.R9_step
4 * ae.R9_step
ae.indexTH23
1X
. . . .
ae.maxGain23
. . .
ae.maxVirtGain
ae.maxDGainAE1 /
ae.maxDGainAE2
(TH23 + 1) * ae.R9_step
(TH23 + 2) * ae.R9_step
(TH23 + 3) * ae.R9_step
(TH23 + 4) * ae.R9_step
ae.maxIndex
. . .
No Gain: Integration
Time & Shutter
Delay (up to 16 lines)
Increasing Exposure Time
Increasing Gain
Normally Set To Ensure
Constant Frame Rate