{"id":32,"date":"2008-09-06T23:15:04","date_gmt":"2008-09-06T14:15:04","guid":{"rendered":"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=32"},"modified":"2008-09-06T23:15:04","modified_gmt":"2008-09-06T14:15:04","slug":"sdram_dai%e3%81%ae%e5%87%ba%e8%8d%b7%e5%89%8d%e5%9f%ba%e6%9d%bf%e3%83%81%e3%82%a7%e3%83%83%e3%82%af","status":"publish","type":"post","link":"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=32","title":{"rendered":"SDRAM_DAI\u306e\u51fa\u8377\u524d\u57fa\u677f\u30c1\u30a7\u30c3\u30af"},"content":{"rendered":"<p>SDRAM_DAI\u57fa\u677f\u306f\u5168\u6570\u51fa\u8377\u691c\u67fb\u3092\u884c\u3063\u3066\u3001\u52d5\u4f5c\u3092\u4e00\u901a\u308a\u78ba\u8a8d\u3057\u3066\u304b\u3089\u304a\u9001\u308a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u51fa\u8377\u30c6\u30b9\u30c8\u306e\u76ee\u7684\u306f\u3001\u90e8\u54c1\u306e\u5b9f\u88c5\u4e0d\u826f\u306a\u3069\u304c\u539f\u56e0\u306e\u4e0d\u826f\u3092\u3075\u308b\u3044\u843d\u3068\u3059\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>SDRAM_DAI\u57fa\u677f\u306e\u5168\u30b3\u30cd\u30af\u30bf\u306b\u5fc5\u8981\u306a\u3082\u306e\u3092\u63a5\u7d9a\u3057\u3066\u304a\u304d\u3001\u30ed\u30fc\u30bf\u30ea\u30fcSW\u3067\u30e2\u30fc\u30c9\u3092\u5207\u308a\u66ff\u3048\u3001\u5165\u529b\u3092\u5207\u308a\u66ff\u3048\u3064\u3064\u3001\u57fa\u677f\u3078\u5165\u529b\uff08\u57fa\u677f\u304b\u3089\u51fa\u529b\uff09\u3059\u308b\u3059\u3079\u3066\u306e\u4fe1\u53f7\u304c\u6b63\u3057\u304fFPGA\u306b\u3064\u306a\u304c\u3063\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\n\u30ed\u30fc\u30bf\u30ea\u30fcSW\u306e\u3069\u3053\u304b\u306e\u30d7\u30eb\u30a2\u30c3\u30d7\u62b5\u6297\u304c\u5916\u308c\u3066\u3044\u305f\u308a\u3001\u30b7\u30e7\u30fc\u30c8\u3057\u3066\u3044\u308c\u3070\u3001SW\u304c\u6b63\u3057\u304f\u52d5\u4f5c\u3057\u307e\u305b\u3093\u306e\u3067\u4e0d\u826f\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u5165\u529bS\/PDIF\u4fe1\u53f7\u306f44.1kHz\u7cfb\u7d71\u306848kHz\u7cfb\u7d71\u3092\u7e4b\u3044\u3067\u304a\u304d\u30012\u3064\u306e\u6c34\u6676\u767a\u632f\u5668\u304c\u52d5\u304f\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<br \/>\nFPGA\u3068SDRAM\u9593\u306f\u4fe1\u53f7\u304c8bit\u5e45\u3067\u63a5\u7d9a\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u305f\u3068\u3048\u3070\u305d\u306e\u3046\u3061\u306eLSBbit\u304c\u534a\u7530\u4e0d\u826f\u306a\u3069\u3067\u672a\u63a5\u7d9a\u3084\u30b7\u30e7\u30fc\u30c8\u3057\u3066\u3044\u305f\u5834\u5408\u306b\u306f\u3001\u51fa\u529b\u306eLSB, 8, 16, 24bit\u76ee\u304c\u304a\u304b\u3057\u304f\u306a\u308a\u307e\u3059\u304b\u3089\u3001\u30aa\u30b7\u30ed\u306e\u6ce2\u5f62\u304c\u5927\u304d\u304f\u4e71\u308c\u3066\u4e0d\u826f\u304c\u8a8d\u77e5\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30ea\u30ea\u30fc\u30b9\u304b\u3089\u73fe\u5728\u307e\u3067\u3001\u3053\u306e\u30c6\u30b9\u30c8\u3067\u767a\u898b\u3055\u308c\u305f\u4e0d\u826f\u767a\u751f\u7387\u306f1%\u3067\u3001\u5b9f\u88c5\u696d\u8005\u3055\u3093\u306e\u4ed5\u4e8b\u306f\u78ba\u304b\u3068\u3044\u3048\u308b\u3067\u3057\u3087\u3046\u3002<br \/>\n\u3061\u306a\u307f\u306b\u3001\u767a\u898b\u3055\u308c\u305f\u4e0d\u826f\u306f\u3001\u6700\u7d42\u51fa\u529b\u306e\u591a\u9023\u62b5\u6297\u306e\u96fb\u6975\u304c1\u3064\u305a\u3064\u30ba\u30ec\u3066\u5b9f\u88c5\u3055\u308c\u3066\u3044\u305f\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u30fb\u30fb\u30fb\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft\" style=\"float: left;\" src=\"http:\/\/fpga.cool.coocan.jp\/electrart\/image200809\/sdram_test.jpg\" alt=\"\" width=\"480\" height=\"360\" \/>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>SDRAM_DAI\u57fa\u677f\u306f\u5168\u6570\u51fa\u8377\u691c\u67fb\u3092\u884c\u3063\u3066\u3001\u52d5\u4f5c\u3092\u4e00\u901a\u308a\u78ba\u8a8d\u3057\u3066\u304b\u3089\u304a\u9001\u308a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u51fa\u8377\u30c6\u30b9\u30c8\u306e\u76ee\u7684\u306f\u3001\u90e8\u54c1\u306e\u5b9f\u88c5\u4e0d\u826f\u306a\u3069\u304c\u539f\u56e0\u306e\u4e0d\u826f\u3092\u3075\u308b\u3044\u843d\u3068\u3059\u3053\u3068\u3067\u3059\u3002 SDRAM_DAI\u57fa\u677f\u306e\u5168\u30b3\u30cd\u30af\u30bf\u306b\u5fc5\u8981\u306a\u3082\u306e\u3092\u63a5\u7d9a &hellip; 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