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AK2308LV Datasheet, PDF (13/36 Pages) Asahi Kasei Microsystems – AK2308LV | |||
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ASAHI KASEI
[AK2308LV]
â PCM ã¤ã³ã¿ã¼ãã§ã¼ã¹
AK2308LV ã¯ä»¥ä¸ã® 4 ã¤ã® PCM ã¤ã³ã¿ã¼ãã§ã¼ã¹ããµãã¼ããã¦ãã¾ãããããã¯å
é¨ã¬ã¸ã¹ã¿ã®è¨å®ã«ãã£
ã¦é¸æãããã¨ãåºæ¥ã¾ãã
ã»PCM ã¢ã¼ãï¼Long Frame/Short Frame ã¯èªåå¤å®ï¼
ã»16bit ãªãã¢ã¢ã¼ã
ã»AK130 B1 ã¢ã¼ã
ã»AK130 B2 ã¢ã¼ã
PCM ãã¼ã¿ã¯ç«¯å DR ããã³ DX ããå
¥åºåããã¾ãããããã®ç«¯åããã¼ã¿ã¯ MSB ãã¡ã¼ã¹ãã§å
¥åºå
ããã¾ããPCM ã¢ã¼ãã§ã®ãã¼ã¿ã¬ã¼ã㯠64kHzÃN(N=1~32ï¼SFãN=2~32ï¼LF)max 2.048MHz ã®ã¹ã
ã¼ãã§ä»»æã«é¸ã¶ãã¨ãåºæ¥ã¾ããAK130 ã¢ã¼ã B1ãB2 ã¯å¼ç¤¾ãã³ãã³ä¼éç¨ LSI ã® AK130 ãæ¥ç¶ãã
ãã¨ãåæã¨ããã¢ã¼ãã§ããB1/B2 ã® 2 ã¤ã®ã¢ã¼ã㯠AK130 ã® B1/B2 ãã£ãã«ã®ãããããç¨ãããã§
é¸æãã¾ãã
16bit ãªãã¢ã¢ã¼ã㯠PCM CODEC å
é¨ã® 14bit 精度 PCM ãªãã¢ãã¼ã¿ã 16bit ãã©ã¼ãããã§åºåã
ãã¢ã¼ãã§ãããã®æã®æ¬éã¯ãã㯠BCLK 㯠64kHzÃN(N=2~32)max2.048MHz ã®ã¹ãã¼ãã§ä»»æã«é¸
ã¹ã¾ãã
âPCM ã¤ã³ã¿ã¼ãã§ã¼ã¹ã®é¸æ
ä¸è¨ï¼ã¤ã®ã¢ã¼ãã¯ä¸è¨ã¢ãã¬ã¹ä¸ã®æå®ãããã« CPU ã·ãªã¢ã«ã¤ã³ã¿ã¼ãã§ã¼ã¹ããæ¸ãè¾¼ããã¨ã«ã
ãé¸æããã¾ããã¾ããA åãμåã®é¸æãè¡ãã¾ãã
PCM ã¤ã³ã¿ã¼ãã§ã¼ã¹é¸æã¬ã¸ã¹ã¿ï¼
âPCM ã³ã³ããã¼ã« Register Type : Read Write[ã¢ãã¬ã¹ 0001ï¼ D2-D0ï¼ (PCM_X, μå/A å)]
ADD
D7
D6
D5
D4
D3
D2
D1
D0
1
ï¼
ï¼
ï¼
â
ï¼
PCM_1 PCM_0
μå
Aå
åæå¤ 0
0
0
0
0
0
0
0
PCM_1ã0 ï¼ PCM ã¤ã³ã¿ã¼ãã§ã¼ã¹ã¢ã¼ãé¸æ
PCM_1 PCM_0
PCM ã¤ã³ã¿ãã§ã¼ã¹
0
0
PCM ãã©ã¼ãããï¼LF or SFï¼
0
1
16bit ãªãã¢ã¢ã¼ã
åè
LF/SF 㯠FS ä¿¡å·ã§èªåå¤å®ï¼æ¬¡ãã¼
ã¸åç
§ï¼
16bit ãªãã¢ãã¼ã¿ãå
¥åºå
1
0
AK130 B1 ã¢ã¼ã
AK130 ã® B1 ãã£ãã«ã使ç¨
1
1
AK130 B2 ã¢ã¼ã
AK130 ã® B2 ãã£ãã«ã使ç¨
â ã¬ã¸ã¹ã¿åæåæ㯠PCM ãã©ã¼ãããã¢ã¼ã(PCM_1/0=00)ãé¸æããã¾ãã
A/u åï¼ A/μåé¸æ
A/μå
0
å¤æå
μå
åè
åæå¤
1
Aå
ï¼ ã¬ã¸ã¹ã¿åæåæã¯Î¼åãé¸æããã¾ãã
ï¼PCM ãã©ã¼ãããã¢ã¼ã
PCM ãã©ã¼ãããã¢ã¼ãã§ã¯ãLong Frame 㨠Short Frame ã®ä¸¡ãã©ã¼ãããããµãã¼ããã¾ããLF/SF
ã®å¤å®ã¯ãAK2308LV ã«å
¥åããã FS ä¿¡å·ãã LSI ãèªåçã«å¤å®ãã¾ãã
<AK2308LV>
13
MS0227âJâ01
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