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\u767a\u8868\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u898b\u307e\u3059\u3068\u3001TI\u306e\u8a55\u4fa1\u30dc\u30fc\u30c9\u901a\u308a\u306b\u57fa\u677f\u3092\u63cf\u3051\u3070\u3001-150dB\u306e\u4fe1\u53f7\u304c\u305d\u308c\u3068\u8a8d\u8b58\u3067\u304d\u308b\u3068\u3044\u3046\u3088\u3046\u306a\u5185\u5bb9\u3060\u3063\u305f\u3068\u601d\u3044\u307e\u3059\u3002\u65ed\u5316\u6210\u304c\u51fa\u3057\u3066\u304d\u3066\u5b9f\u969b\u306b\u88fd\u54c1\u306b\u4f7f\u308f\u308c\u59cb\u3081\u305f\u306e\u3067\u3001\u5bfe\u6297\u4e0a\u3084\u3080\u306a\u304f\u30ea\u30ea\u30fc\u30b9\u3057\u3066\u304d\u305f\u3088\u3046\u306a\u611f\u3058\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n
\u5b9f\u306f\u4ed5\u4e8b\u4e0a\u3067\u3001FPGA\u306e\u6a5f\u80fd\u306bI2C\u306e\u30b9\u30ec\u30fc\u30d6\u3092\u5165\u308c\u8fbc\u3080\u3068\u3044\u3046\u3053\u3068\u3092\u3088\u304f\u3084\u308b\u306e\u3067\u3059\u304c\uff08\u304a\u5ba2\u69d8\u306b\u8981\u6c42\u3055\u308c\u308b\u306e\u3067\u3059\uff09\u3001FPGA\u306e\u56de\u8def\u3092\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u8a18\u8ff0\u8a00\u8a9e\uff08\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u306b\u4f7f\u3046C\u8a00\u8a9e\u306e\u3088\u3046\u306a\u30a4\u30e1\u30fc\u30b8\uff09\u3067\u69cb\u7bc9\u3059\u308b\u969b\u306b\u3001\u673a\u4e0a\u3067\u52d5\u4f5c\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3059\u308b\u305f\u3081\u306b\u3001\u76f8\u624b\u65b9\uff08\u8981\u306fFPGA\u306e\u30ec\u30b8\u30b9\u30bf\u3092\u8a2d\u5b9a\u3059\u308bCPU\u306e\u65b9\u3092\u6307\u3057\u307e\u3059\uff09\u306e\u52d5\u4f5c\u3082\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u8a18\u8ff0\u8a00\u8a9e\u3067\u69cb\u7bc9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u4f55\u304c\u8a00\u3044\u305f\u3044\u304b\u3068\u3044\u3046\u3068\u3001\u901a\u5e38\u306f\u5b89\u3044\u30de\u30a4\u30b3\u30f3\u3067PCM1795\u306a\u3069\u306e\u30ec\u30b8\u30b9\u30bf\u8a2d\u5b9a\u3092\u3059\u308b\u3068\u3053\u308d\u3067\u3059\u304c\u3001I2C\u30de\u30b9\u30bf\u306e\u6a5f\u80fd\u3092\u56de\u8def\u3067\u69cb\u6210\u3067\u304d\u307e\u3059\u306e\u3067\u3001CPLD\u306b\u713c\u304d\u3053\u3093\u3067PCM1795\u306e\u30ec\u30b8\u30b9\u30bf\u8a2d\u5b9a\u3092\u3057\u3066\u307f\u307e\u3057\u305f(\u3082\u3061\u308d\u3093PCM1792A\u306a\u3069\u3082\u3084\u308d\u3046\u3068\u601d\u3048\u3070\u4e00\u7dd2\u3067\u3059)\u3002\u4ed5\u4e8b\u306e\u95a2\u4fc2\u3067I2C\u306e\u30a2\u30ca\u30e9\u30a4\u30b6\u306a\u3069\u3082\u3084\u3080\u306a\u304f\uff1f\u6240\u6709\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u8a2d\u5b9a\u304c\u304d\u3061\u3093\u3068\u3067\u304d\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u306e\u78ba\u8a8d\u3082\u697d\u306b\u3084\u3089\u305b\u3066\u3044\u305f\u3060\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u6b8b\u5ff5\u306a\u304c\u3089\u3001\u30d0\u30e9\u30c3\u30af\u57fa\u677f\u306bPCM1795\u3092\u8f09\u305b\u3066\u8a2d\u5b9a\u3092\u3057\u3066\u307f\u305f\u3068\u3044\u3046\u3060\u3051\u3067\u3001\u5b9f\u969b\u306b\u6709\u7528\u306b\u4f7f\u3044\u5012\u3057\u59cb\u3081\u307e\u3057\u305f\u3001\u3068\u3044\u3046\u8a71\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u3093\u306a\u611f\u3058<\/a>\u306e\u57fa\u677f\u304c\u3042\u308c\u3070\u3044\u308d\u3044\u308d\u5b9f\u9a13\u304c\u3067\u304d\u308b\u306e\u306b\u306a\uff5e\u3001\u3068\u3044\u3063\u305f\u3068\u3053\u308d\u3067\u3059(\u56de\u8def\u5b9a\u6570\u306f\u9069\u5f53\u3067\u3059)\u3002\u00a0<\/p>\n \u4f5c\u3063\u305fI2C\u306e\u56de\u8def\u306f\u300111.2896MHz\u3068\u30ea\u30bb\u30c3\u30c8\u3092\u5165\u308c\u3066\u3042\u3052\u3066\u3001\u30ea\u30bb\u30c3\u30c8\u304c\u89e3\u9664\u3055\u308c\u308b\u3068\u3001\u5de6\u53f32\u3064\u306eDAC\u306e\u30a2\u30c9\u30ec\u30b916\u304b\u308921\u307e\u3067\u3092\u9806\u756a\u306b\u8a2d\u5b9a\u3057(\u521d\u3081\u306bLch\u3092\u8a2d\u5b9a\u3057\u3001\u6b21\u306bRch\u3092\u8a2d\u5b9a)\u3001\u8a2d\u5b9a\u304c\u7d42\u308f\u308b\u3068\u4eca\u5ea6\u306f\u9806\u756a\u306b\u8a2d\u5b9a\u3057\u305f\u30a2\u30c9\u30ec\u30b9\u306e\u30ec\u30b8\u30b9\u30bf\u3092\u8aad\u307f\u3060\u3059\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002\u8aad\u307f\u51fa\u3057\u304c\u7d42\u4e86\u3057\u305f\u3089\u6b21\u306b\u30ea\u30bb\u30c3\u30c8\u304c\u304b\u304b\u308b\u307e\u3067\u306f\u3046\u3093\u3068\u3082\u3059\u3093\u3068\u3082\u8a00\u3044\u307e\u305b\u3093\u3002<\/p>\n PCM1795\u306e\u30c7\u30fc\u30bf\u30b7\u30fc\u30c825\u30da\u30fc\u30b8\u3081\u306e\u3001\u300cWrite Register\u300d\u30922\u3064\u306ePCM1795\u306b\u5bfe\u3057\u3066\u884c\u3044\u3001\u6b21\u306b\u300cRead Register\u3092\u300d2\u3064\u306ePCM1795\u306b\u5bfe\u3057\u3066\u884c\u3044\u307e\u3059\u3002\u300cRegister Address\u300d\u306b\u5148\u982d\u5024\u306e\u300c16\u300d\u756a\u5730\u3092\u5165\u308c\u308b\u3068\u3001\u3042\u3068\u306f\u5b9f\u969b\u306e\u5024\u3060\u3051\u30926\u56de\u7d9a\u3051\u3066\uff0821\u756a\u5730\u307e\u3067\uff09\u66f8\u304d\u8fbc\u3093\u3067\u3044\u304d\u307e\u3059\uff08\u30a2\u30c9\u30ec\u30b9\u306fPCM1795\u5185\u3067\u81ea\u52d5\u7684\u306b\u300c\uff11\u300d\u305a\u3064\u9032\u3093\u3067\u3044\u304d\u307e\u3059\uff09\u3002<\/p>\n \u8aad\u307f\u51fa\u3057\u3082\u300cRepeated Start Condition\u300d\u3068\u3044\u3046\u306e\u304c\u8ffd\u52a0\u306b\u306a\u308b\u3060\u3051\u3067\u66f8\u304d\u3053\u307f\u3068\u307b\u307c\u540c\u3058\u52d5\u4f5c\u3092\u3057\u307e\u3059\u3002<\/p>\n 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ALTERA\u3084XILINX\u306e\u30c4\u30fc\u30eb\u306f\u7121\u6599\u3067\u4f7f\u3048\u307e\u3059\u306e\u3067\u3001\u7d4c\u9a13\u8005\u306e\u65b9\u3060\u3051\u3067\u306a\u304f\u3001\u6311\u6226\u3055\u308c\u305f\u3044\u65b9\u306f\u4e0b\u8a18\u306e\u30bd\u30fc\u30b9\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u9069\u5f53\u306aCPLD\u306b\u66f8\u304d\u3053\u3093\u3067\u307f\u3066\u4e0b\u3055\u3044\u3002\u898f\u6a21\u7684\u306b\u306fXILINX\u306a\u3089XC9572XL\u3042\u305f\u308a\u306b\u5165\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n 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\u8457\u4f5c\u6a29\u306f\u79c1\u3001ElectrArt\u304c\u6240\u6709\u3057\u307e\u3059\u304c\u3001\u3054\u81ea\u8eab\u306e\u691c\u8a0e\u76ee\u7684\u306b\u9650\u3063\u3066\u3054\u81ea\u7531\u306b\u304a\u4f7f\u3044\u9802\u3044\u3066\u7d50\u69cb\u3067\u3059\u3002\u52d5\u4f5c\u4fdd\u8a3c\u3001\u30b5\u30dd\u30fc\u30c8\u306f\u3054\u3056\u3044\u307e\u305b\u3093\u3002\u81ea\u5df1\u8cac\u4efb\u3067\u304a\u9858\u3044\u3057\u307e\u3059\u3002<\/p>\n I2C_MASTER.vhd<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" \u30e9\u30b8\u30aa\u6280\u8853\u3092\u66f8\u5e97\u3067\u30da\u30e9\u30da\u30e9\u3081\u304f\u3063\u3066\u3044\u305f\u3089\u3001TI\u306e\u6cb3\u5408\u3055\u3093\u3068\u3044\u3046\u65b9\u306e\u8a18\u4e8b\u304c\u51fa\u3066\u3044\u307e\u3057\u305f\u3002TI\u308232bit\u306e\u30c7\u30eb\u30bf\u30b7\u30b0\u30deDAC\u3092\u30ea\u30ea\u30fc\u30b9\u3057\u3066\u304d\u305f\u3088\u3046\u3067\u3059\u3002 \u767a\u8868\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u898b\u307e\u3059\u3068\u3001TI\u306e\u8a55\u4fa1\u30dc\u30fc\u30c9\u901a\u308a\u306b\u57fa\u677f\u3092\u63cf\u3051\u3070\u3001-1 … “PCM1795\u3063\u3066\u4f55\u3060\uff1f” \u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,11],"tags":[],"class_list":["post-134","post","type-post","status-publish","format-standard","hentry","category-uncategorized","category-hardware-debug"],"_links":{"self":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/134","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=134"}],"version-history":[{"count":0,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/134\/revisions"}],"wp:attachment":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=134"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=134"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=134"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}