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ASX340AT: 1/4-Inch Color CMOS NTSC/PAL Digital Image Sensor
Features
ASX340AT_DS Rev. F Pub. 5/15 EN 1 ©Semiconductor Components Industries, LLC 2015,
1/4-Inch Color CMOS NTSC/PAL Digital Image
SOC with Overlay Processor
ASX340AT Datasheet, Rev. F
For the latest datasheet, please visit www.onsemi.com
Features
• Low-power CMOS image sensor with integrated
image flow processor (IFP) and video encoder
• 1/4-inch optical format, VGA resolution (640H x
480V)
• 2x upscaling zoom and pan control
•
±40 additional columns and ± 36 additional rows to
compensate for lens alignment tolerances
• Option to use single 2.8 V power supply with off-chip
bypass transistor
• Overlay generator for dynamic bitmap overlay
• Integrated video encoder for NTSC/PAL with overlay
capability and 10-bit I-DAC
• Integrated microcontroller for flexibility
• On-chip image flow processor performs
sophisticated processing, such as color recovery and
correction, sharpening, gamma, lens shading
correction, on-the-fly defect correction, auto white
balancing, and auto exposure
• Auto black-level calibration
• 10-bit, on-chip analog-to-digital converter (ADC)
• Internal master clock generated by on-chip phase-
locked loop (PLL)
• Two-wire serial programming interface
• Interface to low-cost EEPROM and Flash through SPI
bus
• High-level host command interface
• Stand-alone operation support
• Comprehensive tool support for overlay generation
and lens correction setup
• Development system with DevWare
Applications
• Automotive rear view camera and side mirror
• Blind spot and surround view
See “New Features” on page 3.
See details of new features on page 3.
Key parameters are continued on next page.
See “Ordering Information” on page 3
Table 1: Key Parameters
Parameter Typical Value
Pixel size
and type
5.6 m x 5.6 m active pinned-photodiode
with high-sensitivity mode for low-light
conditions
Sensor clear
pixels
728H x 560V (includes VGA active pixels,
demosaic and lens alignment pixels)
NTSC output 720H x 487V
PAL output 720H x 576V
Optical area
(clear pixels)
4.077 mm x 3.136 mm
Optical format ¼-inch
Frame rate 50/60 fields/sec
Sensor scan
mode
Progressive scan
Color filter array RGB standard Bayer
Chief ray angle
(CRA)
0°
Shutter type Electronic rolling shutter (ERS)
Automatic
Functions
Exposure, white balance, black level offset
correction, flicker detection and avoidance,
color saturation control, on the-fly defect
correction, aperture correction
Programmable
Controls
Exposure, white balance, horizontal and
vertical blanking, color, sharpness, gamma
correction, lens shading correction,
horizontal and vertical image flip, zoom,
windowing, sampling rates, GPIO control
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