LM9702 Real Time Digital Image Processor
October 2002
LM9702 Real Time Digital Image Processor
General Description
The LM9702 contains all functions needed to build a VGA digital
still and/or video camera. It incorporates a 16 bit RISC micropro-
cessor, a flexible image processing pipeline, hardware JPEG
compression, and the required periphery modules in a single IC.
This architecture allows a very fast click-to-click time and full res-
olution 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 LM9702 keeps the memory cost of
the complete camera to a minimum.
A chip set comprising of the LM9702 and a National 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 digital still and/or video
camera.
Applications
!
PC Cameras
!
Dual Mode Cameras
!
Digital Still Cameras
!
Clip-on Cameras for PDA鈥檚, Cell Phones, etc.
!
Embedded Cameras for PDA鈥檚, Cell Phones, etc.
!
Industrial Cameras
Key Specifications
Array Formats
Input Color Format
Digital Image Processor
Compression
- Format
- Ratio
Video In Frame Rate
CIF,VGA, SXGA (B/W)
Bayer Pattern
10 bit (12 bit internal)
Base Line JPEG
Programmable
up to 15MHz pixel clock
up to 921.6K-bits per second
960K-byte/s
SRAM, Flash, Compact Flash,
EEPROM
up to 16 Mbyte
up to 36MHz
up to 400KHz
up to 6.0 MHz
up to 36
16K-bytes
up 60Mhz from 12MHz Crystal
2.25 to 2.75 Volt
2.7 to 3.6 Volt
Features
!
Embedded 16 bit RISC processor system
- Up to 16M-bytes of external memory addressing space
- 16K-bytes Internal RAM
- 6 channel DMA
- 8 channel versatile timer
- Interrupt controller
- 16 input wake up module
- Full duplex USART
-
碌wire/SPI
serial port
- 16 general purpose IOs (GPIO)
- SD Memory Card Interface (SPI Mode)
!
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
Video Outputs
- USART
- USB
External CR16C Memory
- Memory Type
- Address Space
- Speed
Serial Interfaces
- ACCESS.bus
-
碌wire/SPI
16 bit RISC Processor
- MIPS
- Internal Memory
Clock Speed
Power Supply
- Core
- IO
Average Power Dissipation 90mW
Package
Operating temperature
128 Laminated CSP
-10
o
C to +85
o
C
System Block Diagram
Flash
or
RAM
LM9702
USART
USB
CMOS Sensor
Module
SD CARD
錚?/div>
2002 National Semiconductor Corporation
www.national.com
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