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
161 ©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
4. Clip the result
MCU controls both CCM and D; see "Auto White Balance Driver" on page 143 and "His-
togram Driver" on page 146.
Decimator
In order to fit image size to customer needs, the image size of the SOC can be scaled
down. The decimator can reduce image to arbitrary size using filtering. The scale-down
procedure is performed by transferring an incoming pixel from the image space into a
decimated (scaled down) space. The procedure can be performed in both X and Y
dimension. All the standard formats with resolution lower than 2 megapixels as well as
customer specified resolutions are supported. Transfer of pixel from the image into the
decimated space is done in the following way, which is the same in X and Y directions:
Each incoming pixel is split in two parts. The first part (P1) goes into the currently
formed output-space pixel while part two (P2) goes to the next pixel. P1 could be equal
or less than value of the incoming pixel while P2 is always less. These two parts are
obtained by multiplying the value of incoming pixel by scaling factors f1 and f2, which
sum is always constant for the given decimation degree and proportional to X1/X0
where X1 is size of the output image and X0 is the size of the input image. It is denoted as
"decimation weight." Coefficients f1 and f2 are calculated in the microcontroller trans-
parently for user based on the specified output image size and mode of SOC operation.
At large decimation degrees, several incoming pixels may be averaged into one deci-
mated pixel. Averaging of the pixels during decimation provides a low pass filter, which
removes high-frequency components from the incoming image, and thus avoids alias-
ing in the decimated space. The decimator has two operational modes—normal and
high-precision. Since the intermediate result for Y decimated pixels has to be stored in a
memory buffer with certain word width, there is a need for additional precision at larger
decimation degrees when scaling factors are small. This is done by increasing the num-
ber of digits for each stored value when decimation is greater than 2.
C
11
C
12
C
13
C
21
C
22
C
23
C
31
C
32
C
33
R
raw
*G
R
-D
G
raw
*G
G
-D
B
raw
*G
B
-D
R
G
B
CLIP