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AK2301BX Datasheet, PDF (16/23 Pages) Asahi Kasei Microsystems – 3.3V Linear PCM CODEC LSI with PLL & Voltage Detector | |||
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ASAHI KASEI
[AK2301BX]
â PCMã¤ã³ã¿ãã§ã¼ã¹
AK2301Bã¯ä»¥ä¸ã®ï¼ã¤ã®PCMãã¼ã¿ã¤ã³ã¿ãã§ã¼ã¹ããµãã¼ããã¦ãã¾ãã
ã»Long Frame Sync(LF)
ã»Short Frame Sync(SF)
PCMãã¼ã¿ã¯ç«¯å(DR,DX)ããé 次å
¥åºåããã¾ãã
ãããã®å ´åã2âs complimentå½¢å¼ã®2é²æ°ã16ãããMSBãã¡ã¼ã¹ãã§ã¤ã³ã¿ã¼ãã§ã¼ã¹ãã¾ãã
ãã ããå
é¨ã³ã¼ããã¯ã¯14ãããã§åä½ãã¦ããããã«ãä¸ä½2ãããã®åºåã¯ãâLâåºå®ã¨ãªãã¾ãã
ã¾ãå
¥åã«ã¤ãã¦ã¯ãä¸ä½2ãããã¯Donât Careã¨ãªãã¾ãã
âPCMã¤ã³ã¿ãã§ã¼ã¹ã®é¸æ
Long Frame/ Short frame ã¯FSããLSIãèªåçã«å¤å®ãã¾ãã
â LONG FRAME (LF) / SHORT FRAME (SF)
âLF/SFã®å¤å®æ¹æ³
AK2301Bã¯ã以ä¸ã®ããã«å
¥åãããFSã®âHâæéã«ããLong Frame, Short Frameããèªåçã«å¤æãã¾
ãã
FS=âHâã®æé
ãã¬ã¼ã æ§æ
BCLKã®2å¨æ以ä¸
LF
BCLKã®1å¨æ
SF
âã¤ã³ã¿ãã§ã¼ã¹ã¿ã¤ãã³ã°
PCMãã¼ã¿ã¯ããã¬ã¼ã åæä¿¡å·FSã«åæãã¦ã1ãã¬ã¼ã åºé(125μs)æ¯ã«ãããã14ããããã¤DX,DR
端åããå
¥åºåããã¾ãã1ãã¬ã¼ã åºéã«ã¯æ大4åã®ã¿ã¤ã ã¹ããã(BCLK=512kHzæ)ãããã¾ãããæ¬
LSIã¯ãã®ãã¡ã®æåã®ã¿ã¤ã ã¹ãããã使ã£ã¦PCMãã¼ã¿ãå
¥åºåãã¾ãã
<MS0599-J-00>
16
2007/2
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