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AK4591VQ Datasheet, PDF (31/41 Pages) Asahi Kasei Microsystems – 入力セレクタ付24bit 4ch ADC + 24bit 6ch DAC | |||
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[AK4591]
(6) ãã¤ã³ã³ã¤ã³ã¿ã¼ãã§ã¼ã¹
ãã¤ã³ã³ã¨ã®ã¤ã³ã¿ã¼ãã§ã¼ã¹ã¯ã RQ (ReQuest Bar).SCLK(Serial data input CLocK),
SI(Serial data Input),SO(Serial data Output), ã® 4 ã¤ ã® å¶ å¾¡ ä¿¡ å· ã§ å® æ½ ã ã¾ ã 。 å¿
è¦ ã« å¿ ã 㦠CS
(ChipSelect Bar)ã使ãã¾ãã
ãã¤ã³ã³ã¤ã³ã¿ãã§ã¼ã¹ãç¨ãã¦ãã³ã³ããã¼ã«ã¬ã¸ã¹ã¿è¨å®ãè¡ãã¾ãã
ãã¤ã³ã³ã¨AK4591ã¨ã®ã¤ã³ã¿ã¼ãã§ã¼ã¹ãè¡ãå ´åã¯ã RQ ãâLâã«ãã¦è¡ãã¾ããSCLKã®ç«ã¡ä¸ã
ãã§ãã¼ã¿ãåãè¾¼ã¿ãSCLKã®ç«ã¡ä¸ããã§ãã¼ã¿ãåºåãã¾ãã
æ¸ãè¾¼ã¿(WRITE)ã¯ãæåã«ã³ãã³ãã³ã¼ããå
¥åãã次ã«ã¬ã¸ã¹ã¿è¨å®ãè¡ãã¾ããèªã¿åºã(READ)
ã¯ãã³ãã³ãã³ã¼ããå
¥åããç¶ãã¦8bitåâLâãå
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RQ ãâHâã«ããäºã«ããï¼ã¤ã®ã³ãã³ããçµäºãã¾ãã®ã§ãæ°ãã«ã³ãã³ããæ¸ãè¾¼ãããã«ã¯ã
RQ ãâHâã«ããã®ã¡åã³âLâã«ãã¦æ¸ãè¾¼ã¿ãè¡ã£ã¦ä¸ããã
AK4591ã§ã¯ã³ãã³ãã³ã¼ãã¨ãã¦20hãã3Fhã¾ã§å²ãå½ã¦ããã¦ãã¾ãã
CS =âHâã«ããã¨ãSIãã¼ã¿ã¯åãè¾¼ã¾ãããSOã¯Hi-zã¨ãªãã¾ãã( CS =âLâã®æã RQ =âHâã§ãSI
ã¯åãè¾¼ã¾ãã¾ããããSOã¯Hi-Zã§ã¯ããã¾ããã)
ã³ ã³ ã ã 㼠㫠㬠㸠㹠㿠㸠㮠å æ è¨ å® ï¼ WRITE ï¼ ã¯ ã ã· ã¹ ã ã 㪠㻠ã ã ä¸ ï¼ S_RESET =âLâ &
INIT_RESET =âHâï¼ã«è¡ã£ã¦ãã ãããAK4591ã§ã¯ãã³ã³ããã¼ã«ã¬ã¸ã¹ã¿ã¸ã®èªã¿æ¸ãã«é¢ãã¦ã¯ã
ã·ã¹ãã ã¯ããã¯(MCLK,LRCLK,BITCLK)ãå¿
è¦ã¨ãã¾ããããã ãããã¤ãºã®å½±é¿ãé¿ããããã«ãã·
ã¹ãã ã¯ããã¯ã®åãæ¿ãä¸ã«èªã¿æ¸ããè¡ãäºã¯ãå§ããã¾ãããã·ã¹ãã ã¯ããã¯ãâLâãããã¯å®
å®ã«åä½ãã¦ããæã«è¡ã£ã¦ä¸ãããä¸é¨ã®ã¬ã¸ã¹ã¿ã§ã¯åä½ä¸ã«è¨å®åºæ¥ããã®ãããã¾ãã(SMUTE
ç)ãåãæ¿ãæã«ã¯ã¯ãªãã¯ãã¤ãºï¼ããé³ï¼å¯¾ççãå¿
è¦ãªå ´åãããã¾ãã
ãã¤ã³ã³ã¨ã®éä¿¡ãç¡ãå ´åã¯ãå¤é¨ãã¤ãºçã«ãã誤åä½ãé¿ããããã« RQ =âHâ,SCLK="H",
SI="L"ã«ãã¦ä¸ãããï¼ CS ã«é¢ãã¦ã¯ãç¨éã«å¿ãã¦ä½¿ãåããã¦ãã ãããï¼
[MS0295-J-01]
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2012/12
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