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
!
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
-
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
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
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
-
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
Operating temperature
-10
o
C to +85
o
C
System Block Diagram
LM9704
CMOS Sensor
Module
Flash
or
RAM
USART
USB
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Overall Chip Block Diagram
Chip Block Diagram
Figure 1.
Ordering Information
Item
Description
Part Number
LM9704
LM9704 Real Time Digital Image Processor
LM9704SL
ACCESS.bus
APB
Co
l
o
r
Config
In
te
r
p
o
l
a
t
i
o
n
Ed
g
e
E
n
ha
nc
em
e
n
t
Co
l
o
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C
o
r
r
ec
t
i
on
Ga
m
m
a
Co
rr
e
c
t
i
o
n
Sc
a
l
i
n
g
Digital Color Processor
wire/SPI
Master
GPIO
CR16C
32K-Bytes
6 Channel
Core Bus
Controller
Interrupt
Controller
CR16C-Microprocessor System
Co
re
B
u
s
Clk Gen
System Mgmt
AM
BA Pe
r
i
p
h
e
r
a
l
Bu
s
acb
mwire
SDI
+
Debug I/F
usb
sys
DMA
16 Pin
16 Input
Wake Up
usart
gpio
jtag
USB
V1.1
Image PreProcessor
S
ens
or
I
/
F
Of
fs
e
t
Config & Raw Statistics
Ba
d
P
i
x
e
l
Co
rre
c
t
i
o
n
Co
lo
r
Ga
i
n
sen
Bridge
USART
Versatile
Timer
timer
Bus Interface
Unit
Pwr Mgt
POR
Fr
a
m
e
Sk
i
p
p
i
n
g
mem
Measurement Engine
Compression
RAM
Co
n
f
i
g
Co
n
f
i
g
JPEG
Encoder
Bus Interface Unit
Bu
s
I
n
te
rfa
c
e
Un
i
t
RG
B
t
o
Y
C
r
C
b
C
o
nv
er
s
i
o
n
Gain
3
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Related Products
Item
Description
Part Number
Development
Kit
LM9704 digital image processor camera development kit. This kit includes
the above mentioned camera base board, a power supply board, status
LCD board, power adapter, windows application software SNAPS DEV.
LM9704DEV-KIT
Camera
Board
LM9704/02 digital image processor camera base board.
LM9704CAMBOARD
LM9702CAMBOARD
Software
Devlopment
Kit
This kit includes CR16C software development tools, National's Camera
Operating System (NCOS) & an iTAG emulator.
CR16-IM04-00
Compact-
Flash Adaptor
This is a small 16 bit CompactFlash adaptor board that can be attached to
the LM9704CamBoard/LM9702CamBoard allowing CompactFlash cards to
be connected to the main system memory bus
LM97COMPACFLASH
SD/MMC
Adaptor
This is a small SD/MMC adaptor board that can be attached to the
LM9704CamBoard/LM9702CamBoard allowing SD and MMC cards to be
connected to the LM9702/LM9704 digital image processor
LM97SDCARD
Head Boards
VGA color sensor LM9627
VGA monochrome sensor LM9617
VGA color sensor LM9628
VGA monochrome sensor LM9618
128x100 monochrome sensor LM9630
VGA monochrome sensor LM9637
VGA color sensor LM9647
SXGA monochrome sensor LM9638
SXGA color sensor LM9648
LM9627HEADBOARD
LM9617HEADBOARD
LM9628HEADBOARD
LM9618HEADBOARD
LM9630HEADBOARD
LM9637HEADBOARD
LM9647HEADBOARD
LM9638HEADBOARD
LM9648HEADBOARD
Lens Kits
1/3" lens kit for the LM9627, LM9617, LM9628 or LM9618
1/5" lens kit for the LM9630
1/4" lens kit for the LM9647, LM9637
1/2" lens kit for the LM9648, LM9638
LM96-1/3LENSKIT
LM96-1/5LENSKIT
LM96-1/4LENSKIT
LM96-1/2LENSKIT
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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2. A critical component is any component of a life support
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expected to cause the failure of the life support device or
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