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AK4141 Datasheet, PDF (31/96 Pages) Asahi Kasei Microsystems – NICAM/A2/EIA-J Digital Stereo Decoder | |||
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CONFIDENTIAL
[AK4141]
1-3. ã¢ã¯ããªãã¸
ãã¼ã¿ãéåºãã¦ããICã¯ã1ãã¤ãã®ãã¼ã¿ãéåºããå¾SDAã©ã¤ã³ã解æ¾ãã¾ã(HIGHã®ç¶æ
ã«ãã)ã
ãã¼ã¿ãåä¿¡ããICã¯æ¬¡ã®ã¯ããã¯ã§SDAã©ã¤ã³ã âLâã«ãã¾ãããã®åä½ã¯ã¢ã¯ããªãã¸ã¨å¼ã°ãããã®
åä½ã«ããæ£ãããã¼ã¿è»¢éãè¡ãããã確èªãããã¨ãã§ãã¾ããAK4141ã¯ã¹ã¿ã¼ã·ã³ã³ãã£ã·ã§ã³ã¨
ã¹ã¬ã¼ã·ã¢ãã¬ã¹ãåãåãã¨ã¢ã¯ããªãã¸ãçæãã¾ããã¾ãWRITEå½ä»¤ã®å ´åã«ã¯åãã¤ãã®åä¿¡ã
å®äºãã度ã«ã¢ã¯ããªãã¸ãçæãã¾ããREADå½ä»¤ã®å ´åã«ã¯ãAK4141ã¯ã¢ã¯ããªãã¸çæã«ç¶ãã¦æå®
ãããã¢ãã¬ã¹ã®ãã¼ã¿ãåºåããå¾SDAã©ã¤ã³ã解æ¾ããSDAã©ã¤ã³ãã¢ãã¿ãã¾ãããã¹ã¿ãã¹ããã
·ã³ã³ãã£ã·ã§ã³ãéããã¢ã¯ããªãã¸ãçæããå ´åãAK4141ã¯æ¬¡ã®ã¢ãã¬ã¹ã®ãã¼ã¿ãåºåãã¾ããã¢
ã¯ããªãã¸ãçæãããªãã£ãå ´åãAK4141ã¯ãã¼ã¿åºåãçµäºãã¾ãã
Clock pulse
for acknowledge
SCL FROM
MASTER
1
8
9
DATA
OUTPUT BY
TRANSMITTER
DATA
OUTPUT BY
RECEIVER
START
CONDITION
Figure 20. ã¢ã¯ããªãã¸ã®çæ
not acknowledge
acknowledge
1-4. 第1ãã¤ã
ã¹ã¬ã¼ãã¢ãã¬ã¹ãå«ã第1ãã¤ãã¯ã¹ã¿ã¼ãã³ã³ãã£ã·ã§ã³ã®å¾ã«å
¥åãããã¹ã¬ã¼ã·ã¢ãã¬ã¹ã«ããã
ã¹ä¸ã®ï¼©ï¼£ã®ä¸ããã¢ã¯ã»ã¹ããICãé¸ã°ãã¾ããã¹ã¬ã¼ã·ã¢ãã¬ã¹ã¯ä¸ä½7ãããã§æ§æããã¾ããä¸
ä½4ãããã¯ãâ1000âã§ããã次ã®3ãããã¯ã¢ã¯ã»ã¹ããICãé¸ã¶çºã®ã¢ãã¬ã¹ãããã§ãããCAD1/CAD0
= â11âã¯æå¹ã§ã¯ããã¾ãããã¹ã¬ã¼ã·ã¢ãã¬ã¹ãå
¥åãããã¨ãããã¤ã¹ã®ã¢ãã¬ã¹ãä¸è´ãã¦ããICã¯
ã¢ã¯ããªãã¸ãçæãããã®å¾å½ä»¤ãå®è¡ãã¾ãã第1ãã¤ãã®8çªç®ã®ããã(æä¸ä½ããã)ã¯R/W bitã§ãã
R/W bit= â1âã®ã¨ãREADå½ä»¤ãå®è¡ãããR/W bit= â0âã®ã¨ãWRITEå½ä»¤ãå®è¡ããã¾ãã
1
0
0
0 CAD1 CAD0 0
R/W
(CAD1-0 bitã¯CAD1-0 pinã¨ä¸è´ãã¦ãã)
Figure 21. 第1ãã¤ãã®æ§æ
CAD1 pin
L
L
L
L
H
H
H
H
CAD0 pin
L
L
H
H
L
L
H
H
R/W
Write
Read
Write
Read
Write
Read
Write
Read
Table 19. 第1ãã¤ãã®è¨å®
First Byte
80H
81H
84H
85H
88H
89H
N/A
N/A
(N/A: Not available)
MS0952-J-03
- 31 -
2013/12
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