{"id":4364,"date":"2015-05-13T00:17:47","date_gmt":"2015-05-12T15:17:47","guid":{"rendered":"https:\/\/y2tech.net\/blog\/?p=4364"},"modified":"2016-06-22T08:16:38","modified_gmt":"2016-06-21T23:16:38","slug":"internal-digital-data-format-of-da300usb","status":"publish","type":"post","link":"https:\/\/y2tech.net\/blog\/audio\/digital-audio\/internal-digital-data-format-of-da300usb-4364\/","title":{"rendered":"DA-300USB\u306e\u30c7\u30fc\u30bf\u4fe1\u53f7\u30d5\u30a9\u30fc\u30de\u30c3\u30c8"},"content":{"rendered":"

DA-300USB\u5185\u90e8\u306e\u30c7\u30fc\u30bf\u4fe1\u53f7\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u8abf\u3079\u3066\u307f\u305f<\/h3>\r\n
\r\n

DA-300USB\u3092\u81ea\u5206\u3067\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u305f\u3081\u306b\u5185\u90e8\u69cb\u9020\u3092\u8abf\u3079\u3066\u307f\u305f\u304c\u3001\u30c7\u30b8\u30bf\u30eb\u51e6\u7406\u7cfb\u57fa\u677f\u304b\u3089DAC\u90e8\u306e\u30e1\u30a4\u30f3\u57fa\u677f\u306b\u6e21\u3055\u308c\u308b\u30aa\u30fc\u30c7\u30a3\u30aa\u30c7\u30fc\u30bf\u4fe1\u53f7\u306e\u53d7\u3051\u6e21\u3057\u65b9\u6cd5\u822c\u7684\u306aI2S\u30c7\u30fc\u30bf\u4fe1\u53f7\u306e\u5f62\u5f0f\u3067\u306f\u306a\u3044\u3088\u3046\u306a\u306e\u3067\u3001\u30c7\u30b8\u30bf\u30eb\u4fe1\u53f7\u7cfb\u306e\u6271\u3044\u3092\u5c11\u3057\u3060\u3051\u63a2\u3063\u3066\u307f\u305f\uff0e<\/p>\r\n
\r\n

\r\n\"Pin
\u30e1\u30a4\u30f3\u57fa\u677f\u306e\u30b3\u30cd\u30af\u30bf\u90e8\u306e\u30b7\u30eb\u30af\u5370\u5237\u306b\u8a18\u3055\u308c\u3066\u3044\u308b\u30c7\u30fc\u30bf\u4fe1\u53f7\u540d<\/span>\r\n
\r\n
\r\n<\/div>\r\n
\r\n\r\n

\u5148\u305a\u3001DAC\u90e8\u306e\u30e1\u30a4\u30f3\u57fa\u677f\u306e\u30b3\u30cd\u30af\u30bf\u90e8\u306e\u30b7\u30eb\u30af\u5370\u5237\u306b\u8a18\u3055\u308c\u3066\u3044\u308b\u30c7\u30fc\u30bf\u4fe1\u53f7\u540d\u3092\u62fe\u3063\u3066\u307f\u308b\u3068\u3001
\r\n
\r\n
\r\n\u3000\uff65Pin#11 LRCK\/DSD-R \u3000\u3000\u3000\u3000\u3000PCM\u4fe1\u53f7\u306eLRCK\u4fe1\u53f7\uff08DSD\u306eR\u30c1\u30e3\u30cd\u30eb\u4fe1\u53f7\u3068\u517c\u7528\uff09
\r\n
\r\n\u3000\uff65Pin#13 DSD-BCK\u3000\u3000\u3000\u3000\u3000\u3000\u3000DSD\u306e\u30d3\u30c3\u30c8\u30af\u30ed\u30c3\u30af\u4fe1\u53f7
\r\n
\r\n\u3000\uff65Pin#15 PCM-R\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000PCM\u306eR\u30c1\u30e3\u30cd\u30eb\u4fe1\u53f7
\r\n
\r\n\u3000\uff65Pin#17 PCM-BCK\u3000\u3000\u3000\u3000\u3000\u3000\u3000PCM\u4fe1\u53f7\u306e\u30d3\u30c3\u30c8\u30af\u30ed\u30c3\u30af\u4fe1\u53f7
\r\n
\r\n\u3000\uff65Pin#19 DSD-L\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000DSD\u306eL\u30c1\u30e3\u30cd\u30eb\u4fe1\u53f7
\r\n
\r\n\u3000\uff65Pin#21 PCM-L\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000PCM\u306eL\u30c1\u30e3\u30cd\u30eb\u4fe1\u53f7
\r\n
\r\n\u3000\uff65Pin#23 USB-MCK\u3000\u3000\u3000\u3000\u3000\u3000\u3000DAC\u3078\u306e\u30de\u30b9\u30bf\u30fc\u30af\u30ed\u30c3\u30af\u4fe1\u53f7\uff08USB\u5165\u529b\u7cfb\uff09
\r\n
\r\n
\r\n\u3068\u306a\u3063\u3066\u3044\u308b\uff0e\u3053\u308c\u3089\u306ePCM\u7cfb\u4fe1\u53f7\u306e\u3046\u3061\u3001PCM-L, PCM-R\u304c\u4e00\u822c\u7684\u306aPCM\u5f62\u5f0f\u306e\u30aa\u30fc\u30c7\u30a3\u30aa\u30c7\u30fc\u30bf\u4fe1\u53f7\u306e\u3088\u3046\u3060\u304c\u3001\u901a\u5e38\u306e\u30aa\u30fc\u30c7\u30a3\u30aa\u30b7\u30ea\u30a2\u30eb\u30c7\u30fc\u30bf\u4fe1\u53f7DATA(SDATA)\u3068\u306f\u3069\u3046\u3082\u4fe1\u53f7\u306e\u6271\u3044\u304c\u7570\u306a\u3063\u3066\u3044\u308b\u307f\u305f\u3044\u3060\uff0e\u5b9f\u306f\u4ee5\u524d\u30aa\u30b7\u30ed\u30b9\u30b3\u30fc\u30d7\u3067LRCK\u3084PCM-BCK\u306e\u6ce2\u5f62\u3092\u89b3\u5bdf\u3057\u305f\u969b\u306b\u3001\u4e00\u822c\u7684\u306aI2S\u4fe1\u53f7\u3068\u306f\u5927\u90e8\u69d8\u5b50\u304c\u7570\u306a\u3063\u3066\u3044\u305f\uff0e44.1KHz\u306ePCM\u30c7\u30fc\u30bf\u3092\u5165\u529b\u3057\u305f\u969b\u306b\u3001LRCK\u306e\u30af\u30ed\u30c3\u30af\u5468\u6ce2\u6570\u304c714KHz\u3068\u306a\u3063\u3066\u304a\u308a\u30018\u500d\u30a2\u30c3\u30d7\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u3055\u308c\u305f352.8KHz\u306e\u500d\u4ee5\u4e0a\u306e\u6570\u5024\u3060\u3063\u305f\u306e\u3067\u4e0d\u601d\u8b70\u306b\u601d\u3063\u3066\u3044\u305f\uff0e<\/p>\r\n
\r\n

\u3053\u308c\u3089\u306e\u4fe1\u53f7\u30e9\u30a4\u30f3\u304c\u3001DAC\u30c1\u30c3\u30d7\u306e\u3069\u306e\u7aef\u5b50\u306b\u3064\u306a\u304c\u3063\u3066\u3044\u308b\u306e\u304b\u3092\u8abf\u3079\u3066\u307f\u305f\u7d50\u679c\u3001\u4e00\u822c\u7684\u306aPCM\u30c7\u30b8\u30bf\u30eb\u4fe1\u53f7\u306e\u5165\u529b\u65b9\u6cd5\u3068\u306f\u7570\u306a\u308b\u65b9\u6cd5\u3067\u3064\u306a\u3044\u3067\u3044\u308b\u3088\u3046\u306a\u306e\u3067\u3001DAC\u30c1\u30c3\u30d7\u306e\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u3092\u304d\u3061\u3093\u3068\u8abf\u3079\u3066\u307f\u308b\u3068\u3001DAC\u30c1\u30c3\u30d7\u5185\u90e8\u306e8\u500d\u30aa\u30fc\u30d0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u3084\u5185\u90e8\u30c7\u30b8\u30bf\u30eb\u30d5\u30a3\u30eb\u30bf\u3092\u4f7f\u308f\u305a\u306b\u3001\u5916\u90e8\u306e\u30c7\u30b8\u30bf\u30eb\u30d5\u30a3\u30eb\u30bf\u3092\u4f7f\u3046\u3001”External Digital Filter” \u30e2\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u5224\u660e\u3057\u305f\uff0e<\/p>\r\n
\r\n

DA-300USB\u306e\u6700\u5927\u306e\u7279\u5fb4\u3067\u3042\u308b\u3001AL32\u30c7\u30b8\u30bf\u30eb\u4fe1\u53f7\u30d3\u30c3\u30c8\u88dc\u5b8c\u51e6\u7406\u6a5f\u80fd\u3068\u72ec\u81ea\u306e\u30c7\u30b8\u30bf\u30eb\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u30e2\u30fc\u30c9\u3092\u58f2\u308a\u306b\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u5f53\u7136DAC\u30c1\u30c3\u30d7\u306e8\u500d\u30aa\u30fc\u30d0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u30c7\u30b8\u30bf\u30eb\u30d5\u30a3\u30eb\u30bf\u30fc\u6a5f\u80fd\u306f\u30d0\u30a4\u30d1\u30b9\u3059\u308b\u3053\u3068\u306b\u306a\u308b\uff0e\u5f93\u3063\u3066DAC\u30c1\u30c3\u30d7\u306e\u4f7f\u3044\u65b9\u3082\u4e00\u822c\u7684\u306aPCM\u30c7\u30fc\u30bf\u51e6\u7406\u7cfb\u3068\u306f\u7570\u306a\u3063\u3066\u3044\u308b\uff0e<\/p>\r\n
\r\n
\r\n

\r\n\"Connection
\r\nConnection Diagram for External Digital Filter (Internal DF Bypass Mode)<\/span>\r\n
\r\n
\r\n\"Audio
\r\nAudio Data Input Format for External Digital Filter <\/span>\r\n
\r\n
\r\n<\/div>\r\n
\r\n

\u4e0a\u56f3\u306fPCM1795\u306e\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u5916\u90e8\u30c7\u30b8\u30bf\u30eb\u30d5\u30a3\u30eb\u30bf\u30fc\u30e2\u30fc\u30c9\u6642\u306e\u63a5\u7d9a\u56f3\u3060\u304c\u3001DA-300USB\u3067\u306f\u5de6\u53f3\u306e\u30c1\u30e3\u30cd\u30eb\u3092\u5225\u3005\u306b\u5165\u529b\u3059\u308b\uff08DFMS=1\uff09\u65b9\u5f0f\u3092\u63a1\u7528\u3057\u3066\u3044\u308b\uff0e\u56f3\u3067\u306fPCM1976\u3068\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u304c\u3001PCM1972,1975,1976\u306f\u30d4\u30f3\u30b3\u30f3\u30d1\u30c1\u30d6\u30eb\u306a\u306e\u3067PCM1975\u3067\u3082\u540c\u3058\u30d4\u30f3\u914d\u7f6e\u3060\uff0e<\/p>\r\n
\r\n

\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u306e\u5916\u90e8\u30c7\u30b8\u30bf\u30eb\u30d5\u30a3\u30eb\u30bf\u30fc\u30e2\u30fc\u30c9\u306e\u89e3\u8aac\u306b\u3088\u308b\u3068\u3001\r\n
\r\n
\r\n\u3000\u2022 LRCK (pin 4): WDCK as word clock input\r\n
\r\n\u3000\u2022 BCK (pin 6): Bit clock for audio data\r\n
\r\n\u3000\u2022 DATA (pin 5): Monaural audio data input when the DFMS bit is not set to 1\r\n
\r\n\u3000\u2022 ZEROL (pin 1): DATAL as left channel audio data input when the DFMS bit is set to 1\r\n
\r\n\u3000\u2022 ZEROR (pin 2): DATAR as right channel audio data input when the DFMS bit is set to 1\r\n
\r\n\u3000”The word clock (WDCK) signal must be operated at 8 times or 4 times the desired sampling frequency, fS.”\r\n
\r\n\u3000\u30ef\u30fc\u30c9\u30af\u30ed\u30c3\u30af(WDCK) \u306f \u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u5468\u6ce2\u6570\u306e4\u500d\u304b8\u500d\u306b\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\uff0e\uff08\u203b\u3000\u4f55\u6545\u304b16\u500d\u306e\u8aac\u660e\u304c\u629c\u3051\u3066\u3044\u308b\uff09\r\n
\r\n
\r\n\u3000”The PCM1795 device in the external digital filter interface mode supports right-justified audio formats including 16-bit, 24-bit, and 32-bit audio data. ”\r\n
\r\n\u3000\u5916\u90e8\u30c7\u30b8\u30bf\u30eb\u30d5\u30a3\u30eb\u30bf\u30fc\u30e2\u30fc\u30c9\u3067\u306f\u3001right-justified\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e16,24,32\u30d3\u30c3\u30c8\u30e2\u30fc\u30c9\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\uff0e<\/p>\r\n
\r\n
\r\n

\r\n\"Register
PCM1795\u306eRegister Map<\/span>\r\n
\r\n
\r\n\"Bit
\r\n\u30c7\u30fc\u30bf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3068\u30ef\u30fc\u30c9\u30af\u30ed\u30c3\u30af(WDCK) \u306e\u8a2d\u5b9a\u30d3\u30c3\u30c8<\/span>\r\n
\r\n
\r\n<\/div>\r\n
\r\n
\r\n

DAC\u3078\u306ePCM\u30c7\u30fc\u30bf\u5165\u529b\u4fe1\u53f7\u3068SPI\u5236\u5fa1\u4fe1\u53f7\u3092\u8997\u3044\u3066\u307f\u305f<\/h4>\r\n
\r\n

DA-300USB\u306eUSB\u30c7\u30b8\u30bf\u30eb\u4fe1\u53f7\u51e6\u7406\u57fa\u677f\u304b\u3089DAC\u30e1\u30a4\u30f3\u30dc\u30fc\u30c9\u306b\u3069\u306e\u3088\u3046\u306a\u4fe1\u53f7\u304c\u6e21\u3055\u308c\u3066\u3044\u308b\u306e\u304b\u3001\u7c21\u6613\u30ed\u30b8\u30c3\u30af\u30a2\u30ca\u30e9\u30a4\u30b6\u3092\u7528\u3044\u3066\u5b9f\u969b\u306b\u30c7\u30fc\u30bf\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3066\u307f\u305f\uff0e<\/p>\r\n
\r\n

\r\n\"LabTool
\r\n\u7c21\u6613\u30ed\u30b8\u30c3\u30af\u30a2\u30ca\u30e9\u30a4\u30b6\u3068\u3057\u3066\u5229\u7528\u53ef\u80fd\u306a “LabTool”<\/a> \u3067\u30c7\u30b8\u30bf\u30eb\u4fe1\u53f7\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b<\/span>\r\n
\r\n
\r\n\"PCM
PCM 44.1KHz Mode\u6642\u306eDAC\u3078\u306ePCM\u5165\u529b\u4fe1\u53f7<\/span>\r\n
\r\n
\r\n\"Initial
\r\n\u96fb\u6e90\u6295\u5165\u5f8c\u306eDAC\u30c1\u30c3\u30d7\u521d\u671f\u5316\u3092\u884c\u3063\u3066\u3044\u308b[Register #20: SRST:1 DSD:0 DFTH:1 MONO:0 CHSL:0 OS1:1 OS0:0]<\/span>\r\n
\r\n
\r\n\"PCM
PCM 44.1KHz \u30e2\u30fc\u30c9\u6642\u306eSPI\u5236\u5fa1\u4fe1\u53f7<\/span>\r\n
\r\n
\r\n\"DSD
DSD128(5.6MHz) \u30e2\u30fc\u30c9\u6642\u306eSPI\u5236\u5fa1\u4fe1\u53f7<\/span>\r\n
\r\n<\/div>\r\n
\r\n
\r\n\"PCM
\r\nPCM 44.1KHz\u5165\u529b\u30e2\u30fc\u30c9\u6642\u306e WDCK,BCK\u4fe1\u53f7\uff08WDCK: 705.6KHz x 16fs\uff09<\/span>\r\n
\r\n
\r\n\"PCM
PCM 48.0KHz\u5165\u529b\u30e2\u30fc\u30c9\u6642\u306e WDCK,BCK\u4fe1\u53f7\uff08WDCK: 768KHz x 16fs\uff09<\/span>\r\n
\r\n
\r\n\"PCM
\r\nPCM 88.2KHz\u5165\u529b\u30e2\u30fc\u30c9\u6642\u306e WDCK,BCK\u4fe1\u53f7\uff08WDCK: 352.8KHz x 4fs\uff09<\/span>\r\n
\r\n
\r\n\"PCM
\r\nPCM 176.4KHz\u5165\u529b\u30e2\u30fc\u30c9\u6642\u306e WDCK,BCK\u4fe1\u53f7\uff08WDCK: 352.8KHz x 2fs\uff09<\/span>\r\n
\r\n
\r\n\"PCM
\r\nPCM 192.0KHz\u5165\u529b\u30e2\u30fc\u30c9\u6642\u306e WDCK,BCK\u4fe1\u53f7\uff08WDCK: 384.0KHz x 2fs\uff09<\/span>\r\n
\r\n
\r\n<\/div>\r\n
\r\n

PCM\u30c7\u30fc\u30bf\u5165\u529b\u6642\u306eWDCK\u306e\u5468\u6ce2\u6570\u3092\u30ed\u30b8\u30c3\u30af\u30a2\u30ca\u30e9\u30a4\u30b6\u306e\u5468\u671f\u6e2c\u5b9a\u30c7\u30fc\u30bf\u3067\u8abf\u3079\u3066\u307f\u308b\u3068\u3001\u5165\u529b\u4fe1\u53f7\u306e\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u5468\u6ce2\u6570\u304c44.1KHz\/48.0KHz \u6642\u306b\u306f\u3001WDCK\u306e\u5468\u6ce2\u6570\u306f\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u5468\u6ce2\u6570 fs \u306e16\u500d\uff08705.6KHz\/768KHz\uff09\u3068\u306a\u3063\u3066\u3044\u308b\uff0e\u540c\u3058\u304f\u300188.2KHz\/96KHz\u306e\u5834\u5408\u306f fs \u306e4\u500d\uff08352.8.6KHz\/384KHz\uff09\u3001176.4KHz\/192KHz\u306e\u5834\u5408\u306f fs \u306e2\u500d\uff08352.8.6KHz\/384KHz\uff09\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\uff0e<\/p>\r\n
\r\n

\r\n

DAC\u30c1\u30c3\u30d7\u3092PCM1792\u306b\u4ea4\u63db\u3059\u308b\u4e8b\u306f\u53ef\u80fd\u304b\uff1f<\/h4>\r\n
\r\n

\u4eca\u56de\u3001\u5185\u90e8\u306e\u30c7\u30b8\u30bf\u30eb\u4fe1\u53f7\u306e\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u8abf\u3079\u3066\u307f\u3066\u3001PCM1795\u3068\u30d4\u30f3\uff06\u30e2\u30fc\u30c9\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u30b3\u30f3\u30d1\u30c1\u306a\u7b48\u306ePCM1792\u306b\u306f\u305d\u306e\u307e\u307e\u3067\u306f\u7f6e\u304d\u63db\u3048\u308b\u4e8b\u304c\u3067\u304d\u306a\u3044\u4e8b\u304c\u5224\u660e\u3057\u305f\uff0e\u554f\u984c\u3068\u306a\u308b\u306e\u306fDA-300USB\u304c\u4f7f\u7528\u3057\u3066\u3044\u308b\u3001\u5916\u90e8\u30c7\u30b8\u30bf\u30eb\u30d5\u30a3\u30eb\u30bf\u30fc\u30e2\u30fc\u30c9\u304c “right-justified” \u3092\u4f7f\u7528\u3057\u3066\u304a\u308a\u3001\u30c7\u30fc\u30bf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u8a2d\u5b9a\u30d3\u30c3\u30c8\uff08\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u30ec\u30b8\u30b9\u30bf #18: FMT[2:0] bits \uff09\u306e\u5024 “001” \u304c PCM1795\u3067\u306f 32bits-right-justified\u3001 PCM1792\u3067\u306f 20bits-right-justified \u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u3001PCM1792\u30c1\u30c3\u30d7\u306e\u5834\u5408\u306f 32bit\u9577\u30c7\u30fc\u30bf\u306eLSB\u507420bits\u304c\u63a1\u7528\u3055\u308c\u3066\u3057\u307e\u3046\u4e8b\u306b\u306a\u308b\uff0e\u3053\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u30b3\u30fc\u30c9\u8a2d\u8a08\u306b\u95a2\u3057\u3066\u306f\u30e1\u30fc\u30ab\u30fc\u5074\u306e\u8a2d\u8a08\u304c\u3061\u3087\u3063\u3068\u305a\u3055\u3093\u3068\u3044\u3046\u304b\u9593\u629c\u3051\u306a\u611f\u3058\u304c\u3059\u308b\uff0e\u540c\u3058\u30b7\u30ea\u30fc\u30ba\u306eDAC\u30c1\u30c3\u30d7\u3067\u30d4\u30f3\u4e92\u63db\u3092\u58f2\u308a\u306b\u3057\u3066\u3044\u308b\u306e\u306a\u3089\u3001\u5c11\u306a\u304f\u3068\u3082\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u30b3\u30fc\u30c9\u306f\u30b7\u30ea\u30fc\u30ba\u9593\u3067\u5171\u901a\u306b\u3059\u308b\u306e\u304c\u666e\u901a\u3060\u3068\u601d\u3046\u304c\u3001\u4f55\u6545\u5f8c\u767a\u306ePCM1795\u3067\u306e32bit\u30e2\u30fc\u30c9\u6642\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30b3\u30fc\u30c9\u3092\u904e\u53bb\u306e\u30b3\u30fc\u30c9\u3068\u3076\u3064\u304b\u308b\u8a2d\u8a08\u3092\u3057\u305f\u306e\u3060\u308d\u3046\u304b\uff0e<\/p>\r\n
\r\n

\u30aa\u30fc\u30c7\u30a3\u30aa\u30c7\u30fc\u30bf\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3068\u30c7\u30fc\u30bf\u30d3\u30c3\u30c8\u9577\u306e\u554f\u984c\u304c\u3042\u308b\u306e\u3067\u3001DA-300USB\u306e\u5834\u5408\u306f\u30d4\u30f3\u4e92\u63db\u306aPCM1792\u306b\u5358\u7d14\u306b\u7f6e\u304d\u63db\u3048\u308b\u4e8b\u306f\u3067\u304d\u306a\u3044\uff0e32bits right-justified\u30c7\u30fc\u30bf\u309224bits right-justified\u306b\u5909\u63db\u3059\u308b\u306b\u306f\u300174HC594\u306a\u3069\u306e\u6c4e\u7528\u7684\u306a\u30b7\u30d5\u30c8\u30ec\u30b8\u30b9\u30bf\u30c1\u30c3\u30d7\u3092\u9593\u306b\u565b\u307e\u305b\u3070\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u5909\u63db\u306f\u4f55\u3068\u304b\u306a\u308a\u305d\u3046\u3060\u304c\u3001DAC\u5074\u306e\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u30ec\u30b8\u30b9\u30bf#18\u306eFMT\u306e\u5024\u309224bit\u7528\u306e “010” \u306b\u5909\u66f4\u3059\u308b\u306e\u306f\u3061\u3087\u3063\u3068\u96e3\u3057\u305d\u3046\u3060\uff0ePCM1795\u7528\u306eSPI\u5236\u5fa1\u30b3\u30fc\u30c9\u3092\u53d7\u3051\u53d6\u3063\u3066\u30bf\u30fc\u30b2\u30c3\u30c8\u7528\u306eDAC\u30c1\u30c3\u30d7\u306eSPI\u3042\u308b\u3044\u306fI2C\u5236\u5fa1\u30b3\u30fc\u30c9\u306b\u5909\u63db\uff08\u4ef2\u4ecb\u304b\u306a\uff1f\uff09\u3059\u308b\u30a4\u30f3\u30bf\u30d7\u30ea\u30bf\u30fc\u306e\u3088\u3046\u306a\u4ed5\u7d44\u307f\u304c\u5fc5\u8981\u306b\u306a\u308b\u3060\u308d\u3046\uff0ePIC\u3084NXP\u306a\u3069\u306e\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30c1\u30c3\u30d7\u3067\u51e6\u7406\u7cfb\u3092\u4f5c\u3089\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u306e\u3067\u304b\u306a\u308a\u5384\u4ecb\u306a\u4e8b\u306b\u306a\u308a\u305d\u3046\u3060\uff0e<\/p>\r\n
\r\n

DA-300USB\u306e\u30c7\u30b8\u30bf\u30eb\u51e6\u7406\u7cfb\u306eDAC\u5236\u5fa1\u30b3\u30fc\u30c9\u306fPCM1795\u30c1\u30c3\u30d7\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u305d\u306e\u307e\u307e\u3067\u306f\u6c4e\u7528\u7684\u306a\u9ad8\u6027\u80fdUSB-IF\u3068\u3057\u3066\u306e\u5229\u7528\u306f\u96e3\u3057\u3044\uff0e<\/b><\/p>\r\n
","protected":false},"excerpt":{"rendered":"DA-300USB\u3092\u81ea\u5206\u3067\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u305f\u3081\u306b\u5185\u90e8\u69cb\u9020\u3092\u8abf\u3079\u3066\u307f\u305f\u304c\u3001\u30c7\u30b8\u30bf\u30eb\u51e6\u7406\u7cfb\u57fa\u677f\u304b\u3089DAC\u90e8\u306e\u30e1\u30a4\u30f3\u57fa\u677f\u306b\u6e21\u3055\u308c\u308b\u30aa\u30fc\u30c7\u30a3\u30aa\u30c7\u30fc\u30bf\u4fe1\u53f7\u306e\u53d7\u3051\u6e21\u3057\u65b9\u6cd5\u822c\u7684\u306aI2S\u30c7\u30fc\u30bf\u4fe1\u53f7\u306e\u5f62\u5f0f\u3067\u306f\u306a\u3044\u3088\u3046\u306a\u306e\u3067\u3001\u30c7\u30b8\u30bf\u30eb\u4fe1\u53f7\u7cfb\u306e\u6271\u3044\u3092\u5c11\u3057\u3060\u3051\u63a2\u3063\u3066\u307f\u305f\uff0e","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[713],"tags":[639,669],"class_list":["post-4364","post","type-post","status-publish","format-standard","hentry","category-digital-audio","tag-da-300usb","tag-internal-digital-signal"],"_links":{"self":[{"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/posts\/4364","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/comments?post=4364"}],"version-history":[{"count":2,"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/posts\/4364\/revisions"}],"predecessor-version":[{"id":4659,"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/posts\/4364\/revisions\/4659"}],"wp:attachment":[{"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/media?parent=4364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/categories?post=4364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/tags?post=4364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}