Field-Programmable Gate Array
Field-Programmable Gate Array (FPGA) eller på dansk en Felt-Programmerbar Port Tabel (FPPT) er en chip, der indeholder programmerbar logikkomponenter kaldet "logikblokke" og programmerbar/rekonfigurerbare ledninger og databusser. Logikblokkene kan udføre Nand-gate, Exclusive-or-gate eller mere komplekse logikfunktioner som f.eks. dekodere eller simple matematiske funktioner. I de fleste FPGAer indeholder logikblokkene også hukommelseselementer eller mere omfattende hukommelsesmængder.
FPGA’en består af en række logikblokke, som en designer kan forbinde med hinanden, således at den kommer til at fungere som en primitiv mikroprocessor, der eksempelvis kan bruges til at få en computer til at køre hurtigere hvis de mest brugte instruktioner, skrives direkte ned i hardwaren på en ekstra FPGA-chip. [1] [2] [3] Et andet eksempel på FPGA accelerering er i PC grafikkort. [4]
Asynkron FPGA, AFPGA
Man har man lavet FPGA’er med pipelining og med asynkron afvikling. [5] [6] [7] [8]
Se også
- ASIC:Application-specific integrated circuit
- ASIP:Application Specific Instruction-set Processor
- CPLD: Complex Programmable Logic Device
- FPAA: Field Programmable Analog Array
- VHDL: VHSIC (Very High Speed Integrated Circuit) Hardware Description Language
- Verilog: Hardware Description Language
- JHDL: Just-Another Hardware Description Language
- Embedded System Design in an FPGA
- Reconfigurable Computing
- Configware
Kilder/referencer
- ^ October 17, 2007 ucr.edu: UC Riverside Research Leads to Self-Improving Chips with Speed ‘Warping’ Computer science research results in new technology that can outperform standard microprocessors up to 1,000 times.
- ^ Compiled Acceleration of C Codes for FPGAs (pdf) Quote: "...Riverside Optimizing Compiler for Configurable Computing. A C/C++ to VHDL compiler...Same speed as hand-written VHDL codes...ROCCC is not intended to compile the whole code to FPGA. Only compute intensive code segments, typically parallel loops..."
- ^ 20 March 2007 Green supercomputer is 'go' in Scotland Quote: "...A supercomputer 10 times more energy efficient and up to 300 times faster than its traditional equivalents..."
- ^ Dec 10th 2006 Open Graphics Project Newsletter Citat: "...We know how long you have dreamt about the possibility of a fully open graphics card. We have the First Photographs of what will be a genuinely Open Graphics Card. This card is not a dream. The card is real...The prototype, is a PCI based FPGA development card with dual DVI output, TV-out and three 300MHz Analog to Digital Converters..."
- ^ Achronix-ULTRA
- ^ Achronix preps 2-GHz Asynchronous FPGA for sampling in 2007
- ^ Asynchronous VLSI and Architecture, Cornell University: Asynchronous Field-Programmable Gate Arrays (AFPGAs) Quote: "...integrated pipelining support..."
- ^ Programmable Asynchronous Pipeline Arrays (2003) John Teifel, Rajit Manohar
