|
AK4141 Datasheet, PDF (30/96 Pages) Asahi Kasei Microsystems – NICAM/A2/EIA-J Digital Stereo Decoder | |||
|
◁ |
CONFIDENTIAL
[AK4141]
â ã·ãªã¢ã«ã³ã³ããã¼ã«ã¤ã³ã¿ã¼ãã§ã¼ã¹
AK4141ã®I2Cãã¹ã¢ã¼ãã®ãã©ã¼ãããã¯ãé«éã¢ã¼ã(max:400kHz)ã§ãã
1. ãã¼ã¿è»¢éã«ã¤ãã¦
ãã¹ä¸ã®ï¼©ï¼£ã¸ã®ã¢ã¯ã»ã¹ã«ã¯ãæåã«ã¹ã¿ã¼ã·ã³ã³ãã£ã·ã§ã³ãå
¥åãã¾ãã次ã«ã1ãã¤ãã§æ§æãã
ãããã¤ã¹ã®ã¢ãã¬ã¹ãå«ãã ã¹ã¬ã¼ã·ã¢ãã¬ã¹ãå
¥åãã¾ãããã®æããã¹ä¸ã®ï¼©ï¼£ã¯ãã®ã¢ãã¬ã¹ã¨
èªåèªèº«ã®ã¢ãã¬ã¹ãæ¯è¼ããã¢ãã¬ã¹ãä¸è´ããICã¯ã¢ã¯ããªãã¸ãçæãã¾ããã¢ãã¬ã¹ãä¸è´ãã
ICã¯ããã®å¾READåã¯WRITEãå®è¡ãã¾ããå½ä»¤çµäºæã«ã¯ãã¹ããã·ã³ã³ãã£ã·ã§ã³ãå
¥åãã¦ä¸ã
ãã
1-1. ãã¼ã¿ã®å¤æ´
SDAã©ã¤ã³ã®ãã¼ã¿å¤æ´ã¯SCLã©ã¤ã³ã âLâã®éã«è¡ã£ã¦ä¸ãããã¯ããã¯ã âHâã®éã«ã¯SDAã©ã¤ã³ã®ç¶æ
ã¯ä¸å®ã§ãªããã°ãªãã¾ããããã¼ã¿ã©ã¤ã³ã âHâ㨠âLâã®éã§ç¶æ
ãå¤æ´ã§ããã®ã¯SCLã©ã¤ã³ã®ã¯ãã
ã¯ä¿¡å·ã âLâã®æã«éããã¾ããSCLã©ã¤ã³ã âHâã®æã«SDAã©ã¤ã³ãå¤æ´ããã®ã¯ãã¹ã¿ã¼ã·ã³ã³ãã£ã·
ã§ã³ãã¹ããã·ã³ã³ãã£ã·ã§ã³ãå
¥åããã¨ãã®ã¿ã§ãã
SCL
SDA
DATA LINE
STABLE :
DATA VALID
CHANGE
OF DATA
ALLOWED
Figure 18. ãã¼ã¿ã®å¤æ´
1-2. ã¹ã¿ã¼ãï½¥ã³ã³ãã£ã·ã§ã³ã¨ã¹ãããï½¥ã³ã³ãã£ã·ã§ã³
SCLã©ã¤ã³ã âHâã®æã«SDAã©ã¤ã³ã âHâãã âLâã«ããã¨ãã¹ã¿ã¼ã·ã³ã³ãã£ã·ã§ã³ãä½ããã¾ããå
¨ã¦
ã®å½ä»¤ã¯ãã¹ã¿ã¼ã·ã³ã³ãã£ã·ã§ã³ããå§ã¾ãã¾ããSCLã©ã¤ã³ã âHâã®æã«SDAã©ã¤ã³ã âLâãã âHâã«
ããã¨ãã¹ããã·ã³ã³ãã£ã·ã§ã³ãä½ããã¾ããå
¨ã¦ã®å½ä»¤ã¯ãã¹ããã·ã³ã³ãã£ã·ã§ã³ã«ããçµäºãã¾
ãã
SCL
SDA
START CONDITION
STOP CONDITION
Figure 19. ã¹ã¿ã¼ã·ã³ã³ãã£ã·ã§ã³ã¨ã¹ããã·ã³ã³ãã£ã·ã§ã³
MS0952-J-03
- 30 -
2013/12
|
▷ |