ASX340AT 1/4inch Color CMOS NTSC/PAL Digital Image SOC with Overlay Processor General Description The ON Semiconductor ASX340AT is a VGA-format, single-chip www.onsemi.com 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 Semiconductors 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 integration advantages of ON Semiconductors advanced active pixel CMOS IBGA63 7.5 7.5 process technology. CASE 503AE The ASX340AT is a complete camera-on-a-chip. It incorporates sophisticated camera functions on-chip and is programmable through ORDERING INFORMATION a simple two-wire serial interface or by an attached SPI EEPROM or See detailed ordering and shipping information on page 3 of Flash memory that contains setup information that may be loaded this data sheet. automatically at startup. The ASX340AT performs sophisticated processing functions including color recovery, color correction, sharpening, programmable Auto Black-Level Calibration gamma correction, auto black reference clamping, auto exposure, 10-Bit, On-Chip Analog-to-Digital 50Hz/60Hz flicker detection and avoidance, lens shading correction, Converter (ADC) auto white balance (AWB), and on-the-fly defect identification and Internal Master Clock Generated by correction. On-Chip Phase-Locked Loop (PLL) The ASX340AT outputs interlaced-scan images at 60 or 50 fields Two-Wire Serial Programming Interface per second, supporting both NTSC and PAL video formats. The image data can be output on one or two output ports: Interface to Low-Cost EEPROM and Flash through SPI Bus Composite analog video (single-ended and differential output support) High-Level Host Command Interface Stand-Alone Operation Support Parallel 8-, 10-bit digital Comprehensive Tool Support for Overlay Features Generation and Lens Correction Setup Low-Power CMOS Image Sensor with Integrated Image Flow Development System with DevWare Processor (IFP) and Video Encoder 1/4-inch Optical Format, VGA Resolution (640 H x 480 V) Applications Automotive Rear View Camera and Side 2x Upscaling Zoom and Pan Control Mirror 40 Additional Columns and 36 Additional Rows to Compensate Blind Spot and Surround View 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 Semiconductor Components Industries, LLC, 2014 1 Publication Order Number: November, 2018 Rev. 11 ASX340AT/DASX340AT 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 condi- tions Sensor Clear Pixels 728 H x 560 V (includes VGA active pixels, demosaic and lens alignment pixels) NTSC Output 720 H x 487 V PAL Output 720 H x 576 V Optical Area (Clear Pixels) 4.077 mm x 3.136 mm 1 Optical Format / -inch 4 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 cor- rection, 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 Windowing Programmable to any size Analog Gain Range 0.516x ADC 10-bit, on-chip Output Interface Analog composite video out, single-ended or differential 8-, 10-bit parallel digital output 1 Output Data Formats Digital: Raw Bayer 8-,10-bit, CCIR656, 565RGB, 555RGB, 444RGB 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 inter- face 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: 2.8 V + 5% Core: 1.8 V + 5% (2.8 V + 5% power supply with off-chip bypass transistor generates a 1.70 1.95 V core voltage supply, which is acceptable for performance.) Supply Voltage IO: 2.8 V + 5% Power Consumption Analog Output Only Full resolution at 60 fps: 291 mW Digital Output Only Full resolution at 60 fps: 192 mW www.onsemi.com 2