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AK2301BX Datasheet, PDF (17/23 Pages) Asahi Kasei Microsystems – 3.3V Linear PCM CODEC LSI with PLL & Voltage Detector | |||
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ASAHI KASEI
[AK2301BX]
âãã¬ã¼ã åæä¿¡å·ï¼Frame Syncï¼FSï¼
8kHzã®åºæºå
¥åä¿¡å·ã§ãã1ãã¬ã¼ã (125usæ¯)ã«14ãããã®PCMãã¼ã¿ãå
¥åºåããã¾ããBCLKã¨åæã
ã¦ãããã¨ãå¿
è¦ã§ãã
âãã¼ã¿æ¬éã¯ããã¯ä¿¡å·ï¼Bit Clock:BCLKï¼
PCMãã¼ã¿ããã®BCLKã«åæãã¦å
¥åºåããã¾ããBCLKã¯256kHzã¨512kHzã§ããã¾ãããã¬ã¼ã ä¿¡å·
ã§ããFSã«åæãã¦ãããã¨ãå¿
è¦ã§ãã
ããã«ãBCLKã¯MCLKã¨åæãã¦ããå¿
è¦ãããã¾ããå
é¨PCMã³ã¼ããã¯ã¯MCLKã«åæããPLLã«ã¦
ä½æãããã¯ããã¯ã§åä½ãã¦ãã¾ããå¾ã£ã¦ãPLLOUTåºåã®256KHzã¾ãã¯512KHzãBCLKã«å
¥åãã¦
ä¸ããã
LongFrame
FS
BCLK
DX
1 2 3 4 5 6 7 8 ï¼ 10 11 12 13 14 L L
DR
Donât
care
1
2
3
4
5
6
7
8
ï¼ 10 11 12 13 14 Donât care
ShortFrame
FS
BCLK
DX
1 2 3 4 5 6 7 8 ï¼ 10 11 12 13 14 L L
DR
Donât
care
1 2 3 4 5 6 7 8 ï¼ 10 11 12 13 14 Donât care
ï¼æ³¨æäºé
ï¼éè¦ï¼
MCLKãåæ¢ããæã¯ãå¿
ãSLEEPãâ1âã«ãã¦ä¸ããã
MCLKãåæ¢ä¸ã¤SLEEPã0ã®ç¶æ
ã¯ãLSIã®æ¶è²»é»æµãå¢å ãã¾ããï¼LSIå
é¨ã§è²«éé»æµãæµãã寿å½ã
çããªãåå ã«ãªãã¾ããï¼
<MS0599-J-00>
17
2007/2
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