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AK4688EN Datasheet, PDF (25/36 Pages) Asahi Kasei Microsystems – Asynchronous Stereo CODEC with Capless Line I/O | |||
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[AK4688]
1-3. ã¢ã¯ããªãã¸
ãã¼ã¿ãéåºãã¦ããICã¯ã1ãã¤ãã®ãã¼ã¿ãéåºããå¾SDAã©ã¤ã³ã解æ¾ãã¾ã(HIGHã®ç¶æ
ã«ãã)ãã
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ã¢ãã¬ã¹ãåãåãã¨ã¢ã¯ããªãã¸ãçæãã¾ããã¾ãWRITEå½ä»¤ã®å ´åã«ã¯åãã¤ãã®åä¿¡ãå®äºãã度
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ãçæãããªãã£ãå ´åãAK4688ã¯ãã¼ã¿åºåãçµäºãã¾ãã
Clock pulse
for acknowledge
SCL FROM
MASTER
1
8
9
DATA
OUTPUT BY
TRANSMITTER
DATA
OUTPUT BY
RECEIVER
START
CONDITION
Figure 14. Acknowledge on the I2C-bus
not acknowledge
acknowledge
1-4. FIRST BYTE
ã¹ã¬ã¼ãã¢ãã¬ã¹ãå«ã第1ãã¤ãã¯ã¹ã¿ã¼ãã³ã³ãã£ã·ã§ã³ã®å¾ã«å
¥åãããã¹ã¬ã¼ã·ã¢ãã¬ã¹ã«ããã
ã¹ä¸ã®ICã®ä¸ããã¢ã¯ã»ã¹ããICãé¸ã°ãã¾ããã¹ã¬ã¼ã·ã¢ãã¬ã¹ã¯ä¸ä½7ãããã§æ§æããã¾ããä¸ä½6ã
ããã¯â001001âã§ããã 次ã®1ãããã¯ã¢ã¯ã»ã¹ããICãé¸ã¶çºã®ã¢ãã¬ã¹ããã(CAD0 bit)ã§ãã CAD0 pin
ã®è¨å®ã«åããã¦CAD0 bitãè¨å®ãã¦ãã ãã(CAD0 pin = âLâ: CAD0 bit = â0â, CAD0 pin =Hâ: CAD0 bit=
â1â)ãã¹ã¬ã¼ã·ã¢ãã¬ã¹ãå
¥åãããã¨ãããã¤ã¹ã®ã¢ãã¬ã¹ãä¸è´ãã¦ããICã¯ã¢ã¯ããªãã¸ãçæãã
ãã®å¾å½ä»¤ãå®è¡ãã¾ãã第1ãã¤ãã®8çªç®ã®ããã(æä¸ä½ããã)ã¯R/W bitã§ããR/W bit= â1âã®ã¨ãREAD
å½ä»¤ãå®è¡ãããR/W bit= â0âã®ã¨ãWRITEå½ä»¤ãå®è¡ããã¾ãã
0
0
1
0
0
1 CAD0 R/W
Figure 15. The First Byte
MS1420-J-00
- 25 -
2012/05
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