Datasheet-1
Table Of Contents
- 1/3-Inch Wide-VGA CMOS Digital Image Sensor
- Features
- Applications
- Ordering Information
- Table of Contents
- List of Figures
- List of Tables
- General Description
- Ball Descriptions
- Pixel Data Format
- Color Device Limitations
- Output Data Format
- Serial Bus Description
- Two-Wire Serial Interface Sample Read and Write Sequences
- Feature Description
- Operational Modes
- Signal Path
- On-Chip Biases
- Window Control
- Blanking Control
- Pixel Integration Control
- Variable ADC Resolution
- Gain Settings
- Black Level Calibration
- Row-wise Noise Correction
- Automatic Gain Control and Automatic Exposure Control
- Pixel Clock Speed
- Hard Reset of Logic
- Soft Reset of Logic
- STANDBY Control
- Monitor Mode Control
- Read Mode Options
- LINE_VALID
- LVDS Serial (Stand-Alone/Stereo) Output
- LVDS Output Format
- Electrical Specifications
- Package Dimensions
- Appendix A – Serial Configurations
- Appendix B – Power-On Reset and Standby Timing
- Revision History
PDF: 3295348826/Source:7478516499 Aptina reserves the right to change products or specifications without notice.
MT9V022_DS - Rev.H 6/10 EN
25 ©2005 Aptina Imaging Corporation. All rights reserved.
MT9V022: 1/3-Inch Wide-VGA Digital Image Sensor
Feature Description
Changes to Integration Time
With automatic exposure control disabled (R0xAF, bit 0 is cleared to LOW), and if the
total integration time (R0x0B) is changed via the two-wire serial interface while
FRAME_VALID is asserted for frame n, the first frame output using the new integration
time is frame (n + 2). Similarly, when automatic exposure control is enabled, any change
to the integration time for frame n first appears in frame (n + 2) output.
The sequence is as follows:
1. During frame n, the new integration time is held in the R0x0B live register.
2. At the start of frame (n + 1), the new integration time is transferred to the exposure
control module. Integration for each row of frame (n + 1) has been completed using
the old integration time. The earliest time that a row can start integrating using the
new integration time is immediately after that row has been read for frame (n + 1).
The actual time that rows start integrating using the new integration time is depen-
dent on the new value of the integration time.
3. When frame (n + 1) is read out, it is integrated using the new integration time. If the
integration time is changed (R0x0B written) on successive frames, each value written
is applied to a single frame; the latency between writing a value and it affecting the
frame readout remains at two frames.
However, when automatic exposure control is disabled, if the integration time is
changed through the two-wire serial interface after the falling edge of FRAME_VALID
for frame n, the first frame output using the new integration time becomes frame
(n+3).
Figure 20: Latency When Changing Integration
FRAME_VALID
Image Data
Frame Start
LED_OUT
Output image with
Int = 200 rows
Output
image with
Int = 300
rows
Int = 300 rows
Int = 200 rows
Int = 200 rows
Int = 300 rows
New Integration
Programmed
Actual
Integration