Actel FPGA????

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Actel FPGA????

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FPGA

• FPGA(Field Programmable Gate Array)
• ?????? PLDs(Programmable Logic Devices)
• ????(register)??
• ????
• Routing??,????,??????
• FPGA???
• SRAM Base - ???????????????
• Anti-fuse - ??????,???????

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FPGA

• Segmented interconnect
• Unpredictable delays slower local interconnect

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Actel FPGA

• Products
• Ex,SX,MX,ProASIC,Axcelerator

• Workbench
• Libero IDE

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Axcelerator family FPGA

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Axcelerator family

• Logic module
• C-cell and R-cell
• Programmable interconnected element
• Metal-to-metal anti-fuse

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Axcelerator family

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Logic module

• C-cell(Combinational Logic Cell)
• The C-cell can implement more than 4,000
  combinational functions. (all functions of one
  and two variables, 223 of 256 functions of three
  variables, most functions of four varibles, some
  of five variables, few of six and seven
  variables, and one of eight variables.)

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Logic module

• C-cell??

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Logic module

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Logic module

• R-cell(Register Logic Cell)
• ?????? C-cell ??? D flip-flop ???????? D
  flip-flop ???????? implement sequential logic?

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Anti-fuse technology

• The connectors resistance changes from high to
  low when high voltage is placed across it.
• Require a very small area
• Gives abundant routing resources.
• Actel anti-fuse parts can be programmable only
  once.

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Anti-fuse technology

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Anti-fuse technology

• ????????
• ??? CMOS ????????,????????????????????????,???????
  ?? 50 ??,????????????????? metal-to-metal
  anti-fuse ?????,?????? anti-fuse ?????,??AX ??
  FPGA ?????????????????

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Anti-fuse technology

• ????
• metal-to-metal anti-fuse ?????,??????????????,????
  ??????,?? AX ?? FPGA ?????????

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Anti-fuse technology

• ????
• AX ?? FPGA ????????????,????????????????
  metal-to-metal anti-fuse ????????? AX ?? FPGA
  ???? reverse engineering ?????

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References

• http//www.actel.com (Actel????)
• http//www.aexcel.com.tw (??????????)
• Contemporary Logic Design??(????????)