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FPGA工作原理和结构介绍.pdf

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FPGAn9(0 =FPGA{0> FPGA£Field¤Programmable Gate Array⁄§ =y|?§§§·3PAL!GAL!CPLD?§˜:? u—"§·;^8⁄>·£ASIC⁄+¥«‰>· y§Q)߉>·v§qk?§>·Œk" :" =FPGAn> FPGA^6LCA£Logic Cell Array⁄øVg§S)6‹CLB£Configurable Logic Block⁄!\‹IOB£Input Output Block⁄Sº£Interconnect⁄ n'"Xª1⁄«: FPGA|^.ØL£16@1RAM⁄5¢y|6§zØLº D>u\§>u25˜ƒ6>·‰˜I/O§dd ⁄Q¢y|6ıUq¢yS6ıU˜6‹§ø ‹m|^7ƺpº‰ºI/O‹" 1
eªlook up table(LUT) 1.Look-up table with N-inputs can be used to implement any combina- torial function of N inputs. 2.LUT is programmed with the truth-table Here is an example of LUT: 4-input AND gate 2
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–FPGA¥LUT („/⁄RAM!ROMFIFO("3¢SA^ ¥§¡S‹RAMŒ·J¡›ˇ" ¡‹RAMN18k’A§=18’A! 1024§ –IUC§vK˜k§?UN£ ⁄Uu18k’A¶g§UL36’A",§–ı ¡‹RAM?Ø5/⁄RAM§du¡S‹RAMŒ§ 2¡^K" 5'·L] ]ºˇFPGAS⁄k§º†ß‰X &3º˜UD" FPGA¡SkX·L]§ †!!'y'4aaO"1a· ]§^u¡S¤E/¶1a·] §^–⁄¡Bankmp&1¤&¶1na·Æ ]§^u⁄˜6m6pº¶1oa·'“ ]§^u;k¤!E&" 3¢S¥OIJ]§g˜/ \6L(^J]5ºˇ‹" l ø§]ƒ^{O(Jk!’X" 6'.SiıU S i ı U ‹ DLL £Delay Locked Loop⁄! PLL £Phase Locked Loop⁄!DSPCPU^?n£SoftCore⁄"y35·LSiı U§ƒ¡FPGA⁄X?O§ƒ^MØ OU§¯SOC†L" DLLPLLkaqıU§–⁄¤p! $¸˜ “ ' “§– 9 ’ N £ ı U" Xilinxœ i ) ¡ 8 ⁄ DLL§Alteraœi¡8⁄PLL§Latticeœi#.¡8⁄ PLLDLL" PLL DLL–ˇLIP)⁄B/?1+n" DLL(Xª1-5⁄«" 8
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