參數(shù)資料
型號(hào)： LM9704SL
廠商： National Semiconductor Corporation
英文描述： Real Time Digital Image Processor
中文描述： 實(shí)時(shí)數(shù)字圖像處理器
文件頁數(shù)： 1/4頁
文件大小： 74K
代理商： LM9704SL
2002 National Semiconductor Corporation
www.national.com
October 2002
LM9704 Real Time Digital Image Processor
General Description
The LM9704 contains all functions needed to build an SXGA or
VGA digital still and video camera. It incorporates a 16 bit RISC
microprocessor, a flexible image processing pipeline, hardware
JPEG compression, and the required peripheral modules in a
single IC. This architecture allows a very fast click-to-click time
and full resolution video without sacrificing image quality or cost;
because the computation extensive operations are processed by
circuitry dedicated to image processing. The highly optimized
memory management provided by the LM9704 keeps the mem-
ory cost of the complete camera to a minimum.
A chip set comprising of the LM9704 and a National SXGA or
VGA CMOS image sensor complemented by a lens, battery,
compact flash, power management for the battery, and LCD
(optional) yields a complete high performance cost effective digi-
tal still and/or video camera.
Features
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Embedded 16 bit RISC processor system
- Up to 16M-bytes of external memory addressing space
- 32K-bytes Internal RAM
- 6 channel DMA
- 8 channel versatile timer
- Interrupt controller
- 16 input wake up module
- Full duplex USART
-
μ
wire/SPI serial port
- 16 general purpose IOs (GPIO)
Glueless CMOS image sensor interface
ACCESS.bus serial interface for imager sensor control
Integrated USB v1.1 for connection to PC
Raw Image Data Processor
- Defective pixel correction
- Digital gain and brightness adjustment
- Raw data statistics measurement engine
Color Image processing
- Bayer to RGB Interpolation
- Fully programmable color correction
- Image sharpening
- Programmable gamma correction
- Thumbnail generation
- RGB to YCrCb conversion
- Digital gain
Hardware JPEG Compression for both video and snapshot.
System management
- Internal Clock generation from 12MHz Crystal
- Power management
- Reset generation
JTAG based serial on-chip debug interface
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Applications
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PC Cameras
Dual Mode Cameras
Digital Still Cameras
Clip-on Cameras for PDA’s, Cell Phones, etc.
Embedded Cameras for PDA’s, Cell Phones, etc.
Industrial Cameras
Key Specifications
Array Formats
CIF, VGA, SXGA
Input Color Format
Bayer Pattern
Digital Image Processor
10 bit (12 bit internal)
Compression
- Format
- Ratio
Base Line JPEG
Programmable
Video In Frame Rate
up to 15MHz pixel clock
Video Outputs
- USART
- USB
up to 921.6K-bits per second
960K-byte/s
External CR16C Memory
- Memory Type
- Address Space
- Speed
SRAM, Flash, Compact Flash,
EEPROM
up to 16 Mbyte
up to 36MHz
Serial Interfaces
- ACCESS.bus
-
μ
wire/SPI
up to 400KHz
up to 6.0 MHz
16 bit RISC Processor
- MIPS
- Internal Memory
up to 36
32K-bytes
Clock Speed
up to 60 Mhz from 12MHz Crystal
Power Supply
- Core
- IO
2.25 to 2.75 Volt
2.7 to 3.6 Volt
Average Power Dissipation 95mW
Package
128 Pin Laminated CSP
-10
o
C to +85
o
C
Operating temperature
System Block Diagram
LM9704
CMOS Sensor
Module
Flash
or
RAM
USART
USB
L
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