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AK2306LVM Datasheet, PDF (11/36 Pages) Asahi Kasei Microsystems – ISDN/VoIPターミナルアダプタ用 2チャンネル PCMコーデック LSI | |||
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ASAHI KASEI
â GCI ï¼General Circuit Interfaceï¼
[AK2306/LV]
âã¤ã³ã¿ãã§ã¼ã¹ã¿ã¤ãã³ã°
åãã£ã³ãã«ã®PCMãã¼ã¿ã¯ããã¬ã¼ã åæä¿¡å·FSã«åæãã¦ã1ãã¬ã¼ã åºé(125μs)æ¯ã«ãããã8ããã
ãã¤DX,DR端åããå
¥åºåããã¾ãã
âãã¬ã¼ã åæä¿¡å·ï¼Frame Syncï¼FSï¼
8kHzã®åºæºå
¥åä¿¡å·ã§ãã1ãã¬ã¼ã (125usæ¯)ã«8ãããã®PCMãã¼ã¿ãå
¥åºåããã¾ããBCLKã¨åæãã¦ã
ããã¨ãå¿
è¦ã§ããFSã¯PLLã®å
¥åã¨ãªããããããã¨ã«å
é¨ã®åä½ã¯ããã¯ãçæããã¾ãã
âBCLK
BCLKã®å¨æ³¢æ°ã¯PCMãã¼ã¿ã¬ã¼ãã®2åã§ããå
¥åå¨æ³¢æ°ç¯å²ã¯512kHzï½4096kHzã§ãã
FS
BCLK
DX
B1 ch
B2 ch
1234567812345678
DR
Donât
care
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Donât
care
SEL2B=0
SEL2B=1
â
â
B1-CHANNEL (CH0)
B1-CHANNEL (CH1)
B2-CHANNEL (CH1)
B2-CHANNEL (CH0)
âPCMãã¼ã¿å
¥åºåãã£ãã«(B1 or B2)ã®æå®
CH0,CH1ã®PCMãã¼ã¿ãB1,B2ãã£ã³ãã«ã®ã©ã¡ãã®ã¿ã¤ãã³ã°ã§å
¥åºåãããæå®ãã¾ãã
以ä¸ãåç
§ãã¦SEL2Bã¬ã¸ã¹ã¿ãè¨å®ãã¦ä¸ããã
CH0,CH1å
¥åºåãã£ã³ãã«é¸æï¼ã¢ãã¬ã¹ï¼101 Bitï¼1ï¼
SEL2B
CH0
CH1
åè
0
B1
B2
åæå¤
1
B2
B1
ï¼æ³¨æäºé
ï¼éè¦ï¼
å
¨ãã¯ã¼ãã¦ã³æ以å¤ã¯FSã¨BCLKãåæ¢ããªãã§ä¸ããã
FSã¨BCLKã®ã©ã¡ãããåæ¢ããã¨AK2306ã®PLLã¯èªèµ°å¨æ³¢æ°ã§åä½ãã¾ãã
ãã®å ´åãAK2306ã®Ring Tone Generatorã®æ§è½ã¯ä¿è¨¼ããã¾ããã
MS0093-J-06
11
2012/01
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