ASX340AT2C00XPED0-DPBR1 数据手册
ASX340AT
1/4‐inch Color CMOS
NTSC/PAL Digital Image
SOC with Overlay Processor
General Description
The ON Semiconductor ASX340AT 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 integration
advantages of ON Semiconductor’s advanced active pixel CMOS
process technology.
The ASX340AT 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 ASX340AT 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 ASX340AT 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
Features
• Low-Power CMOS Image Sensor with Integrated Image Flow
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Processor (IFP) and Video Encoder
1/4-inch Optical Format, VGA Resolution (640 H x 480 V)
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
© Semiconductor Components Industries, LLC, 2014
November, 2018 − Rev. 11
1
www.onsemi.com
IBGA63 7.5 y 7.5
CASE 503AE
ORDERING INFORMATION
See detailed ordering and shipping information on page 3 of
this data sheet.
• Auto Black-Level Calibration
• 10-Bit, On-Chip Analog-to-Digital
Converter (ADC)
• Internal Master Clock Generated by
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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
Publication Order Number:
ASX340AT/D
ASX340AT
Table 1. KEY PARAMETERS
Parameter
Typical Value
Pixel Size and Type
5.6 mm x 5.6 mm active pinned-photodiode with high-sensitivity mode for low-light conditions
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
Optical Format
1/ -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 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
Windowing
Programmable to any size
Analog Gain Range
0.5–16x
ADC
10-bit, on-chip
Output Interface
Output Data
Analog composite video out, single-ended or differential; 8-, 10-bit parallel digital output
Formats1
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 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: 2.8 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
Power Consumption
IO: 2.8 V + 5%
Analog Output Only
Full resolution at 60 fps: 291 mW
Digital Output Only
Full resolution at 60 fps: 192 mW
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2
ASX340AT
Table 1. KEY PARAMETERS (continued)
Parameter
Typical Value
Package
63-BGA, 7.5 mm x 7.5 mm, 0.65 mm pin pitch
Ambient Temperature
Operating: −40°C to 105°C
Functional: −40°C to + 85°C
Storage: −50°C to + 150°C
Dark Current
Fixed Pattern Noise
< 200 e/s at 60°C with a gain of 1
Column