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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.

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

-

µwire/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

Applications

! 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 (B/W)

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

-

µwire/SPI

up to 400KHz

up to 6.0 MHz

16 bit RISC Processor

-MIPS

- Internal Memory

up to 36

16K-bytes

Clock Speed

up 60Mhz from 12MHz Crystal

Power Supply

-Core

-IO

2.25 to 2.75 Volt

2.7 to 3.6 Volt

Average Power Dissipation

90mW

Package

128 Laminated CSP

Operating temperature

System Block Diagram

LM9702

CMOS Sensor

Module

Flash

or

RAM

USART

USB

SD CARD