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AK5701KN_17 Datasheet, PDF (50/64 Pages) Asahi Kasei Microsystems – PLL & MIC-AMP内蔵16-Bit Stereo ADC | |||
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[AK5701]
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ADCãPower-upæã«ã¯ã¯ããã¯ãä¾çµ¦ããã¦ããå¿
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1. PLLãã¹ã¿ã¢ã¼ãã®å ´å
Power Supply
PDN pin
PMVCM bit
(Addr:10H, D2)
MCKO bit
(Addr:16H, D2)
PMPLL bit
(Addr:11H, D0)
MCKI pin
M/S bit
(Addr:11H, D1)
BCLK pin
LRCK pin
MCKO pin
(1)
(2) (3)
(4)
(5)
Input
40msec(max)
40msec(max)
(7)
(6)
Output
(8)
Output
Example:
Audio I/F Format: I2S
BCLK frequency at Master Mode: 64fs
Input Master Clock Select at PLL Mode: 11.2896MHz
MCKO: Enable
Sampling Frequency: 44.1kHz
(1) Power Supply & PDN pin = âLâ ï âHâ
(2)Addr:11H, Data:12H
Addr:14H, Data:23H
Addr:15H, Data:2FH
(3)Addr:10H, Data:04H
(4)Addr:16H, Data:04H
Addr:11H, Data:13H
MCKO, BCLK and LRCK output
Figure 45. Clock Set Up Sequence (1)
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(1) é»æºç«ã¡ä¸ãå¾ãPDN pin âLâ ï âHâ
ãã®åºéã¯AK5701ã®ãªã»ããã®ããã150ns以ä¸ã® âLâåºéãå¿
è¦ã§ãã
(2) ãã®åºéã«ãDIF1-0, PLL3-0, FS3-0, BCKO1-0, M/S bitsã®è¨å®ã次ã®é çªã®ã¨ããè¡ã£ã¦ä¸ããã
(2a) M/S bit = â1â , PLL3-0, FS3-0, BCKO1-0ã®è¨å®
(2b) DIF1-0ã®è¨å®ã
(3) VCOMã®ãã¯ã¼ã¢ãã: PMVCM bit = â0â ï â1â
åãããã¯ãç«ã¡ä¸ããåã«æåã«VCOMãç«ã¡ä¸ãã¦ä¸ããã
(4) MCKOåºåã使ç¨ããå ´å: MCKO bit = â1â
MCKOåºåã使ç¨ããªãå ´å: MCKO bit = â0â
(5) PMPLL bit = â0â ï â1âãè¨å®ããMCKI pinã«ã¯ããã¯ãä¾çµ¦ãããå¾ãPLLåä½ãã¹ã¿ã¼ããã¾ãã
PLLã®ããã¯æéã¯MCKI=12MHzã®ã¨ã40ms(max)ã§ã(Table 4)ã
(6) PLLãå®å®å¾ãBCLK, LRCKãåºåãå§ããæ£å¸¸ãªåä½ãéå§ãã¾ãã
(7) MCKO bit = â1âã®å ´åããã®åºéã§ã¯MCKO pinããæ£å¸¸ã§ãªãã¯ããã¯ãåºåããã¾ãã
(8) MCKO bit = â1âã®å ´åãPLLãå®å®å¾MCKO pinããæ£å¸¸ãªã¯ããã¯ãåºåããã¾ãã
MS0404-J-04
- 50 -
2015/10
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