TI DM355视频IP网络照相参考设计

TI公司的TMS320DM355 DaVinci数字媒体处理器是高度集成可编程的平台,适用于数码相机,数码相框,IP安全照相机,4路数字视频记录仪,视频门铃以及其它低成本的手提数字视频应用.本文介绍了采用DM355的视频IP网络照相(IPNC)参考设计的硬件特性,软件特性,DM355的主要特性以及图像传感器MT9P031的特性和方框图.此外,还介绍了IPNC的系统方框图.

Texas Instruments offers three different highly optimized reference designs based on the TMS320DM355 DaVinci™ digital media processor for the IPNC market to enable developers
to speed through the design process as well as reducing overall bill of materials costs.
These solutions reduce development to under four months by including:
Complete and optimized schematics
Gerber fi les
Free Linux application source code, including:
Integrated auto white balance and auto exposure
Simple motion detection
Dual-stream HD MPEG-4 and MJPEG video codecs to support recording and monitoring
needs at full frame rates
DaVinci IP Netcam software framework including I/O application programming interfaces
(APIs), media APIs and DaVinci Codec Engine

参考设计硬件特性:
TMS320DM355 SoC, ARM926 and hardware video coprocessor
Aptina 5 MP sensor (2 x 2 binning ~1.3 MP) CMOS imager optimized for low-light performance
Board size 65 x 50 mm
Low-power (< 3 W)
参考设计软件特性:
Complete Linux-based IP network camera application including free source code
Dual-stream capabilities
Integrated auto white balance and auto exposure
Field-proven, robust, royalty-free bundled MPEG-4 and MJPEG video codecs
DaVinci IPNC software framework including I/O APIs, media APIs and DaVinci Codec Engine
Ability to add video analytics with DaVinci TMS320DM643x digital media processors



图1.基于TMS320DM355参考设计软件框图
TMS320DM355 DaVinci处理器
The DM355 is a highly integrated, programmable platform for digital still camera, digital photo frames, IP security cameras, 4-channel digital video recorders, video door bell application, and other low cost portable digital video applications. Designed to offer portable video designers and manufacturers the ability to produce affordable portable digital video solutions with high picture quality, the DM355 combines high performance MPEG4 HD (720p) codecs and JPEG codecs up to 50M pixels per second, high quality, and low power consumption at a very low price point. The DM355 also enables seamless interface to most additional external devices required for a complete digital camera implementation. The interface is flexible enough to support various types of CCD and CMOS sensors, signal conditioning circuits, power management, DDR/mDDR memory, SRAM, NAND, shutter, Iris and auto-focus motor controls, etc.
The DM355 processor core is an ARM926EJ-S RISC processor. The ARM926EJ-S is a 32-bit processor core that performs 32-bit and 16-bit instructions and processes 32-bit, 16-bit, and 8-bit data. The core uses pipelining so that all parts of the processor and memory system can operate continuously.

主要特性:

High-Performance Digital Media System-on-Chip
135-, 216- and 270-MHz ARM926EJ-S Clock Rate
Fully Software-Compatible With ARM9
Extended Temperature 216-Mhz Devices are Available
ARM926EJ-S Core
Support for 32-Bit and 16-Bit (Thumb Mode) Instruction Sets
DSP Instruction Extensions and Single Cycle MAC
ARM&reg; Jazelle&reg; Technology
EmbeddedICE-RT&#8482; Logic for Real-Time Debug
ARM9 Memory Architecture
16K-Byte Instruction Cache
8K-Byte Data Cache
32K-Byte RAM
8K-Byte ROM
Little Endian
MPEG4/JPEG Coprocessor
Fixed Function Coprocessor Supports:
MPEG4 SP Codec at HD (720p), D1, VGA, SIF
JPEG Codec up to 50M Pixels per Second
Video Processing Subsystem
Front End Provides:
Hardware IPIPE for Real-Time Processing
up to 14-bit CCD/CMOS Digital Interface
16-/8-bit Generic YcBcR-4:2 Interface (BT.601)
10-/8-bit CCIR6565/BT655 Interface
Up to 75-MHz Pixel Clock
Histogram Module
Resize Engine
Resize Images From 1/16x to 8x
Separate Horizontal/Vertical Control
Two Simultaneous Output Paths
Back End Provides:
Hardware On-Screen Display (OSD)
Composite NTSC/PAL video encoder output
8-/16-bit YCC and Up to 18-Bit RGB666 Digital Output
BT.601/BT.656 Digital YCbCr 4:2:2 (8-/16-Bit) Interface
Supports digital HDTV (720p/1080i) output for connection to external encoder
External Memory Interfaces (EMIFs)
DDR2 and mDDR SDRAM 16-bit wide EMIF With 256 MByte Address Space (1.8-V I/O)
Asynchronous16-/8-bit Wide EMIF (AEMIF)
Flash Memory Interfaces
NAND (8-/16-bit Wide Data)
OneNAND(16-bit Wide Data)
Flash Card Interfaces
Two Multimedia Card (MMC) / Secure Digital (SD/SDIO)
SmartMedia
Enhanced Direct-Memory-Access (EDMA) Controller (64 Independent Channels)
USB Port with Integrated 2.0 High-Speed PHY that Supports
USB 2.0 Full and High-Speed Device
USB 2.0 Low, Full, and High-Speed Host
Three 64-Bit General-Purpose Timers (each configurable as two 32-bit timers)
One 64-Bit Watch Dog Timer
Three UARTs (One fast UART with RTS and CTS Flow Control)
Three Serial Port Interfaces (SPI) each with two Chip-Selects
One Master/Slave Inter-Integrated Circuit (I2C) Bus&reg;
Two Audio Serial Port (ASP)
I2S and TDM I2S
AC97 Audio Codec Interface
S/PDIF via Software
Standard Voice Codec Interface (AIC12)
SPI Protocol (Master Mode Only)
Four Pulse Width Modulator (PWM) Outputs
Four RTO (Real Time Out) Outputs
Up to 104 General-Purpose I/O (GPIO) Pins (Multiplexed with Other Device Functions)
On-Chip ARM ROM Bootloader (RBL) to Boot From NAND Flash, MMC/SD, or UART
Configurable Power-Saving Modes
Crystal or External Clock Input (typically 24 MHz or 36 MHz)
Flexible PLL Clock Generators
Debug Interface Support
IEEE-1149.1 (JTAG) Boundary-Scan-Compatible
ETB (Embedded Trace Buffer) with 4K-Bytes Trace Buffer memory
Device Revision ID Readable by ARM
337-Pin Ball Grid Array (BGA) Package (ZCE Suffix), 0.65-mm Ball Pitch
90nm Process Technology
3.3-V and 1.8-V I/O, 1.3-V Internal



参考设计主要特性:
TI DM355-216 High Performance Integrated platform.
Micron 5M CMOS sensor.
MPEG4 video compression and triple stream.
Highest resolution: 1280 x 720.
Min. illumination: 1 lux F 1.2 (Color).
Support POE.
Embedded web server.
Supports a built-in microphone.
Supports motion detection.
Supports the SD card for alarms & scheduled recording.
Supports USB interface for basic network setup.



图2.IPNC系统方框图

图像传感器MT9P031
主要特性:
DigitalClarity&reg; imaging technology
Low-power, progressive scan image sensor
5-megapixel resolution (2592H x 1944V)
1/2.5-inch optical format
On-chip, 12-bit analog-to-digital converter (ADC)
12 fps at full resolution
Up to 60 fps at 720p resolution
Viewfinder and snapshot modes
Programmable gain and exposure
Two-wire serial interface
Global reset
Binning for enhanced viewing experience
Phase-lock loop (PLL) for versatile clock-in scheme and sensitivity
指标:
Imaging Array
Optical Format: 1/2.5-inch
Active Array: 2592(H) x 1944(V)
Imaging Area: 5.70mm(H) x 4.28mm(V)
Speed/Output
Frame Rate: 15 fps at full resolution 30 fps at 1080p resolution (1920H x 1080V)
Up to 60 fps at 720p resolution
Data Rate: 96 Mp/s
Master Clock: 96 MHz
Data Format: 12-bit parallel Sensitivity
Pixel Size: 2.2μm x 2.2μm
Dynamic Range: 70.1dB (full resolution) 76dB (2 x 2 binning)
Responsivity: 1.4 V/lux-sec (550nm) Power
Supply: Analog: 2.6–3.1V (2.8V nominal)
Digital: 1.7–1.9V (1.8V nominal)
I/O: 1.8–3.1V
Consumption: <260mW
Temperature Range
Operating: –30°C to +70°C
Package: 48-pin iLCC or Die




图3. MT9P031方框图