ASX342ATSC00XPED0 ONSEMI 1/4 inch VGA Color CMOS NTSC/PAL Car gauge Low light rear view around side view blind spot 360-degree panoramic camera Image sensor SOC and overlay processor
ASX342ATSC00XPED0, ONSEMI 1/4 inch VGA color CMOS, NTSC/PAL, CMOS with good low light effect, rear view and side view blind spot 360-degree panoramic camera chip, automotive image sensor, SOC and overlay processor, ASX340 upgraded productor, MT9V139 replacement
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 phaselocked 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
● 360-degree panoramic camera
Table 1: Key Parameters
Parameter、Typical Value
● Pixel size and type：5.6 μm x 5.6 μm active pinnedphotodiode 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： 1/4-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
● Overlay Support：Utilizes SPI interface to load overlay data from external flash/EEPROM memory with the following features:
★ Available in Analog output and BT656 Digital output
★ Overlay Size 360 x 480 pixel rendered into 720 x 480 (NTSC) or 720 x 576 (PAL)
★ Up to four (4) overlays may be blended simultaneously
★ Selectable readout: Rotating order user-selected
★ Dynamic scenes by loading pre-rendered frames from external memory
★ Palette of 32 colors out of 64,000
★ 8 colors per bitmap
★ Blend factor dynamically-programmable for smooth transitions
★ Fast update rate of up to 30 fps
★ Every bitmap object has independent x/y position
★ Statistic Engine to calibrate optical alignment
★ Number Generator
● Analog gain range 0.5–16x
● ADC 10-bit, on-chip
● Output interface Analog composite video out, single-ended or differential; 8-, 10-bit parallel digital output
● Output data formats1 Digital: Raw Bayer 8-,10-bit, CCIR656, 565RGB, 555RGB, 444RGBWindowing Programmable to any size
● Data rate：
★ Parallel: 27 MHz Pixel clock
★ NTSC: 60 fields/sec
★ PAL: 50 fields/sec
● Control interface：Two-wire I/F for register interface plus high-level command exchange. SPI port to interface to external memory to load overlay data, register settings, or firmware extensions.
● Input clock for PLL： 27 MHz
● SPI Clock Frequencies ：1.6875 – 18 MHz, programmable
● Supply voltage
★ Analog: 2.8V ± 5%
★ Core: 1.8 V ± 5% (2.8V ± 5% power supply with off-chip bypass transistor generates a 1.70 - 1.95 V core voltage supply, which is acceptable for performance.)
★ IO: 2.8 V ± 5%
● Powerconsumption
★ Analog output only： Full resolution at 60 fps: 291 mW
★ Digital output only：Full resolution at 60 fps: 192 mW
● Package 63-BGA, 7.5 mm x 7.5 mm, 0.65mm pin pitch
● Ambient temperature
★ Operating: -40 °C to 105 °C
★ Functional: -40 °C to + 85 °C
★ Storage: -50°C to + 150°C
● Dark Current < 200 e/s at 60 °C with a gain of 1
● Fixed pattern noise
★ Column < 2 %
★ Row < 2 %
● Responsivity ：16.5 V/lux-s at 550 nm
● Signal to noise ratio (S/N) ：46 dB
● Pixel dynamic range： 87 dB
New Features
● Temperature sensor for dynamic feedback and sensor control
● Automatic 50Hz/60Hz flicker detection
● 2x upscaling zoom and pan/tilt control
● Independent control of colorburst parameters in the NTSC/PAL encoder
● Horizontal field of view adjustment between 700 and 720 pixels on the analog output
● Option to use single 2.8V power supply with off-chip bypass transistor
● SPI EEPROM support for lower cost system design.
General Description
The ON Semiconductor ASX342AT is a VGA-format, single-chip CMOS active-pixel digital image sensor for automotive applications. It captures high-quality color images at VGA resolution and outputs NTSC or PAL interlaced composite video.
The VGA CMOS image sensor features ON Semiconductor’s breakthrough low-noise imaging technology that achieves superior image quality (based on signal-to-noise ratio and low-light sensitivity) while maintaining the inherent size, cost, low power, and integrationadvantages of ON Semiconductor's advanced active pixel CMOS process technology.
The ASX342AT is a complete camera-on-a-chip. It incorporates sophisticated camera functions on-chip and is programmable through a simple two-wire serial interface or by an attached SPI EEPROM or Flash memory that contains setup information that may be loaded automatically at startup.
The ASX342AT performs sophisticated processing functions including color recovery, color correction, sharpening, programmable gamma correction, auto black reference clamping, auto exposure, 50Hz/60Hz flicker detection and avoidance, lens shading correction, auto white balance (AWB), and on-the-fly defect identification and correction.
The ASX342AT outputs interlaced-scan images at 60 or 50 fields per second, supporting both NTSC and PAL video formats. The image data can be output on one or two output ports:
● Composite analog video (single-ended and differential output support)
● Parallel 8-, 10-bit digital
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