Orientation and Application for Embedded System

1

• Orientation and Application for Embedded System

???????????
????????????? ? ? ?
2
Personal Computer ? a general-purpose computing
system
PCB
3
Embedded System ? a special-purpose computing
system



remote controller PDA, mobile phone

• Most embedded systems are designed for
• Special purpose (customizing and
  non-programmable)
• Real time applications 3. Stable
  applications
• 4. Automatic applications
  

4
Applications

• Smart phone, VOIP
• Digital TV, set-top box
• PlayStation
• PDA, mp3 player
• Camera, DV
• Air-conditioner, microwave oven, sensor network
• Car (abs, air bag) gt100 processors

5
Requirements

• Friendly user interface
• Short time-to-market
• Real-time (Speed)
• Cost
• Power consummation/dissipation (portable?)
  

6
Orientation for Embedded System Processors
Traditional embedded systems uses low-level
processors only.
uP
ROM
UART
A/D
RAM
USB
Advanced embedded systems (many processors)
ARM
DSP
mp3
ROM
USB
RAM
MPEG
FLASH
ASIC
7
Embedded System Processors

• Embedded Microprocessor Unit, EMPU
• Microcontroller Unit, MCU
• Embedded Digital Signal Processor, EDSP
• System on Chip

8
???????(EMPU)

• ??????CPU ?
• ???????? ?
• ????????????????? ?
• ????????????????????
• ?????????????
• ???????????Am186/88?386EX?SC-400?Power
  PC?68000?MIPS?ARM????

9
???????(MCU)

• ?????????????,??????ROM/EPROM?RAM?????????????/???
  ?WatchDog?I/O????????????A/D?D/A?Flash
  RAM?EEPROM???????????
• ??????????????,??????,?????????????????
• ????????8051?P51XA?MCS-251?MCS-96/196/296?C166/167
  ?MC68HC05/11/12/16?68300?84????MCU???????70????

10
???DSP???(EDSP)

• DSP??????????????????,???????DSP???,??????,???????
  ???
• ??????FFT????????DSP??????????????,DSP????????????
  ??????DSP??,????????DSP????
• ???????Texas Instruments? TMS320???Motorola?DSP560
  00???

11
????(SoC)

• ?????????????????
• ????????????????????????
• ????????????? ?
• SoC????????????
• ??????Infineon (Siemens)?TriCore,Motorola?M-Core,?
  ?ARM????,Echelon?Motorola?????Neuron????
• ??SoC??????????????????????Philips?Smart XA ?

12
Design Flow
hardware/software partition is very difficult?
cost, time
13
Jobs for Embedded System
ARM
DSP
mp3
ROM
USB
RAM
MPEG
FLASH
ASIC
Three main components for embedded system

• Designer for chips
• Designer for system/devices
• Designer for firmware/software

14
Hardware Design ? Chip (1/4)
Synthesis TranslationOptimizationMapping
Describe circuits with hardware description
language (HDL??????) ? VHDL and Verilog
always _at_(