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AK4688EN Datasheet, PDF (14/36 Pages) Asahi Kasei Microsystems – Asynchronous Stereo CODEC with Capless Line I/O | |||
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[AK4688]
â Ïελ/εϨÊÏÏÊÏ
àªà°
MSN pinã§PORT1ã®ãã¹ã¿/ã¹ã¬ã¼ãã¢ã¼ããè¨å®ãã¾ããPORT2ã¯ã¹ã¬ã¼ãã¢ã¼ãã®ã¿å¯¾å¿ãã¾ãããã¹ã¿
ã¢ã¼ãæã¯ãLRCK1 pinã¨BICK1 pin ã¯åºåãã³ã§ããã¹ã¬ã¼ãã¢ã¼ãæã¯ãLRCK1 (LRCK2) pinã¨BICK1
(BICK2) pin ã¯å
¥åãã³ã§ã(Table 5)ã
MSN pin
L
H
PORT1 (ADC)
BICK1, LRCK1
Input (slave mode)
Output âLâ(master mode)
PORT2 (DAC)
BICK2, LRCK2
Input (slave mode)
Input (slave mode)
â PORT1(ADC) ΫϩοΫàªà°
Table 5. Master/Salve Mode
ãã¹ã¿ã¢ã¼ãæ (MSN pin = âHâ)ãå¿
è¦ãªã¯ããã¯ã¯ãMCLK1 ã§ããCKS1-0 bit ã¨CKS pin ã¯ã¯ããã¯å¨æ³¢æ°
ãè¨å®ãã¾ã (Table 6, Table 7)ãADCã¯MCLK1, BICK1, LRCK1ãä¾çµ¦ãããã¾ã§ãã¯ã¼ãã¦ã³ç¶æ
ã§ãã
CKS1 bit
0
0
1
1
CKS0 bit
0
1
0
1
Clock Speed
256fs
384fs
512fs
768fs
(default)
Table 6. PORT1(ADC) Master Clock Control (Master Mode, I2Cã³ã³ããã¼ã«ã¢ã¼ã)
CKS pin
L
H
Clock Speed
256fs
768fs
Table 7. PORT1(ADC) Master Clock Control (Master Mode, H/W ã³ã³ããã¼ã«ã¢ã¼ã)
ã¹ã¬ã¼ãã¢ã¼ãæ (MSN pin = âLâ)ãå¿
è¦ãªã¯ããã¯ã¯ãMCLK1, LRCK1, BICK1 ã§ããMCLK1 ã¨LRCK1 ã¯
åæãã¦ããå¿
è¦ãããã¾ãããä½ç¸ãåãããå¿
è¦ã¯ããã¾ãããé»æºONçã®ãªã»ãã解é¤æ(PDN1 pin =
âââ)ã¯MCLK1ã¨LRCK1ã¨BICK1ãå
¥åãããã¾ã§ADCã¯ãã¯ã¼ãã¦ã³ç¶æ
ã§ãã
ADCã¯Normal Speed Mode(fs = 32k ~ 48kHz)ã®ã¿ã«å¯¾å¿ãã¾ãã
LRCK1
MCLK1 (MHz)
Fs
256fs
384fs
512fs
32.0kHz
8.1920
12.2880
16.3840
44.1kHz
11.2896
16.9344
22.5792
48.0kHz
12.2880
18.4320
24.5760
768fs
24.5760
33.8688
36.8640
Table 8. PORT1(ADC) System Clock Example
BICK1 (MHz)
64fs
2.0480
2.8224
3.0720
MS1420-J-00
- 14 -
2012/05
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