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AK4688EN Datasheet, PDF (15/36 Pages) Asahi Kasei Microsystems – Asynchronous Stereo CODEC with Capless Line I/O | |||
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[AK4688]
â PORT2 (DAC) ΫϩοΫàªà°
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è¦ãªã¯ããã¯ã¯ãMCLK2, LRCK2, BICK2 ã§ãããã¹ã¿ã¯ãã㯠(MCLK2) ã¨ãµã³ããªã³ã°ã¯ãã㯠(LRCK2)
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è¦ã¯ããã¾ãããMCLK2 ã¯ã¤ã³ã¿ãï¼ã¬ã¼ã·ã§ã³ãã£ã«ã¿ã¨
ÎΣ å¤èª¿å¨ã«ä½¿ç¨ããã¾ããåä½ä¸ã«MCLK2, LRCK2ã¾ãã¯BICK2ãæ¢ã¾ã£ãå ´åã¯ãDACã¯èªåçã«ãªã»ã
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ã«ãªããã¢ããã°åºåã¯0Vé»å§(typ)ãåºåãã¾ããMCLK2ã¨LRCK2ã¨BICK2ãåå
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ã解é¤ããåä½ãåéãã¾ããé»æºONçã®ãªã»ãã解é¤æ(PDN2 pin = âââ)㯠MCLK2ã¨LRCK2ã¨BICK2 ã
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DACã®ãµã³ããªã³ã°ã¹ãã¼ããè¨å®ããæ¹æ³ã¯äºç¨®é¡ããã¾ããä¸ã¤ã¯DFS1-0 bits ã使ã£ãManual Setting
Mode (ACKS bit = â0â)ãããä¸ã¤ã¯Auto Setting Mode (ACKS bit = â1â)ã§ãã
1. Manual Setting Mode (ACKS bit = â0â)
ACKS bit = â0âã§DACã¯Manual Setting Modeã«ãªãã¾ãããµã³ããªã³ã°ã¹ãã¼ãã¯DFS1-0 bitsã§è¨å®ãã¾ã(Table 9)ã
DFS1 bit
0
0
1
1
DFS0 bit
0
1
0
1
DAC Sampling Speed (fs)
Normal Speed Mode
32kHz~48kHz
Double Speed Mode
64kHz~96kHz
Quad Speed Mode
128kHz~192kHz
Not Available
-
(default)
Table 9. PORT2(DAC) Sampling Speed (ACKS bit = â0â, Manual Setting Mode)
LRCK2
Fs
32.0kHz
44.1kHz
48.0kHz
256fs
8.1920
11.2896
12.2880
MCLK2 (MHz)
384fs
512fs
12.2880
16.3840
16.9344
22.5792
18.4320
24.5760
768fs
24.5760
33.8688
36.8640
BICK2 (MHz)
64fs
2.0480
2.8224
3.0720
Table 10. PORT2(DAC) system Clock Example (Normal Speed Mode @Manual Setting Mode)
LRCK2
Fs
88.2kHz
96.0kHz
128fs
11.2896
12.2880
MCLK2 (MHz)
192fs
256fs
16.9344
22.5792
18.4320
24.5760
384fs
33.8688
36.8640
BICK2 (MHz)
64fs
5.6448
6.1440
Table 11. PORT2(DAC)system Clock Example (Double Speed Mode @Manual Setting Mode)
LRCK2
Fs
176.4kHz
192.0kHz
128fs
22.5792
24.5760
MCLK2 (MHz)
192fs
256fs
33.8688
-
36.8640
-
384fs
-
-
BICK2 (MHz)
64fs
11.2896
12.2880
Table 12. PORT2(DAC) system Clock Example (Quad Speed Mode @Manual Setting Mode)
MS1420-J-00
- 15 -
2012/05
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